foundationdb/fdbclient/FileBackupAgent.actor.cpp

4717 lines
193 KiB
C++

/*
* FileBackupAgent.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fdbclient/BackupAgent.actor.h"
#include "fdbclient/BackupContainer.h"
#include "fdbclient/DatabaseContext.h"
#include "fdbclient/Knobs.h"
#include "fdbclient/ManagementAPI.actor.h"
#include "fdbclient/Status.h"
#include "fdbclient/SystemData.h"
#include "fdbclient/KeyBackedTypes.h"
#include "fdbclient/JsonBuilder.h"
#include <cinttypes>
#include <ctime>
#include <climits>
#include "fdbrpc/IAsyncFile.h"
#include "flow/genericactors.actor.h"
#include "flow/Hash3.h"
#include <numeric>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <algorithm>
#include "flow/actorcompiler.h" // This must be the last #include.
static std::string boolToYesOrNo(bool val) { return val ? std::string("Yes") : std::string("No"); }
static std::string versionToString(Optional<Version> version) {
if (version.present())
return std::to_string(version.get());
else
return "N/A";
}
static std::string timeStampToString(Optional<int64_t> epochs) {
if (!epochs.present())
return "N/A";
return BackupAgentBase::formatTime(epochs.get());
}
static Future<Optional<int64_t>> getTimestampFromVersion(Optional<Version> ver, Reference<ReadYourWritesTransaction> tr) {
if (!ver.present())
return Optional<int64_t>();
return timeKeeperEpochsFromVersion(ver.get(), tr);
}
// Time format :
// <= 59 seconds
// <= 59.99 minutes
// <= 23.99 hours
// N.NN days
std::string secondsToTimeFormat(int64_t seconds) {
if (seconds >= 86400)
return format("%.2f day(s)", seconds / 86400.0);
else if (seconds >= 3600)
return format("%.2f hour(s)", seconds / 3600.0);
else if (seconds >= 60)
return format("%.2f minute(s)", seconds / 60.0);
else
return format("%ld second(s)", seconds);
}
const Key FileBackupAgent::keyLastRestorable = LiteralStringRef("last_restorable");
// For convenience
typedef FileBackupAgent::ERestoreState ERestoreState;
StringRef FileBackupAgent::restoreStateText(ERestoreState id) {
switch(id) {
case ERestoreState::UNITIALIZED: return LiteralStringRef("unitialized");
case ERestoreState::QUEUED: return LiteralStringRef("queued");
case ERestoreState::STARTING: return LiteralStringRef("starting");
case ERestoreState::RUNNING: return LiteralStringRef("running");
case ERestoreState::COMPLETED: return LiteralStringRef("completed");
case ERestoreState::ABORTED: return LiteralStringRef("aborted");
default: return LiteralStringRef("Unknown");
}
}
template<> Tuple Codec<ERestoreState>::pack(ERestoreState const &val) { return Tuple().append(val); }
template<> ERestoreState Codec<ERestoreState>::unpack(Tuple const &val) { return (ERestoreState)val.getInt(0); }
ACTOR Future<std::vector<KeyBackedTag>> TagUidMap::getAll_impl(TagUidMap *tagsMap, Reference<ReadYourWritesTransaction> tr, bool snapshot) {
state Key prefix = tagsMap->prefix; // Copying it here as tagsMap lifetime is not tied to this actor
TagMap::PairsType tagPairs = wait(tagsMap->getRange(tr, std::string(), {}, 1e6, snapshot));
std::vector<KeyBackedTag> results;
for(auto &p : tagPairs)
results.push_back(KeyBackedTag(p.first, prefix));
return results;
}
KeyBackedTag::KeyBackedTag(std::string tagName, StringRef tagMapPrefix)
: KeyBackedProperty<UidAndAbortedFlagT>(TagUidMap(tagMapPrefix).getProperty(tagName)), tagName(tagName), tagMapPrefix(tagMapPrefix) {}
class RestoreConfig : public KeyBackedConfig {
public:
RestoreConfig(UID uid = UID()) : KeyBackedConfig(fileRestorePrefixRange.begin, uid) {}
RestoreConfig(Reference<Task> task) : KeyBackedConfig(fileRestorePrefixRange.begin, task) {}
KeyBackedProperty<ERestoreState> stateEnum() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
Future<StringRef> stateText(Reference<ReadYourWritesTransaction> tr) {
return map(stateEnum().getD(tr), [](ERestoreState s) -> StringRef { return FileBackupAgent::restoreStateText(s); });
}
KeyBackedProperty<Key> addPrefix() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
KeyBackedProperty<Key> removePrefix() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
// XXX: Remove restoreRange() once it is safe to remove. It has been changed to restoreRanges
KeyBackedProperty<KeyRange> restoreRange() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
KeyBackedProperty<std::vector<KeyRange>> restoreRanges() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
KeyBackedProperty<Key> batchFuture() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
KeyBackedProperty<Version> restoreVersion() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
KeyBackedProperty<Reference<IBackupContainer>> sourceContainer() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
// Get the source container as a bare URL, without creating a container instance
KeyBackedProperty<Value> sourceContainerURL() {
return configSpace.pack(LiteralStringRef("sourceContainer"));
}
// Total bytes written by all log and range restore tasks.
KeyBackedBinaryValue<int64_t> bytesWritten() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
// File blocks that have had tasks created for them by the Dispatch task
KeyBackedBinaryValue<int64_t> filesBlocksDispatched() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
// File blocks whose tasks have finished
KeyBackedBinaryValue<int64_t> fileBlocksFinished() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
// Total number of files in the fileMap
KeyBackedBinaryValue<int64_t> fileCount() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
// Total number of file blocks in the fileMap
KeyBackedBinaryValue<int64_t> fileBlockCount() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
Future<std::vector<KeyRange>> getRestoreRangesOrDefault(Reference<ReadYourWritesTransaction> tr) {
return getRestoreRangesOrDefault_impl(this, tr);
}
ACTOR static Future<std::vector<KeyRange>> getRestoreRangesOrDefault_impl(RestoreConfig *self, Reference<ReadYourWritesTransaction> tr) {
state std::vector<KeyRange> ranges = wait(self->restoreRanges().getD(tr));
if (ranges.empty()) {
state KeyRange range = wait(self->restoreRange().getD(tr));
ranges.push_back(range);
}
return ranges;
}
// Describes a file to load blocks from during restore. Ordered by version and then fileName to enable
// incrementally advancing through the map, saving the version and path of the next starting point.
struct RestoreFile {
Version version;
std::string fileName;
bool isRange; // false for log file
int64_t blockSize;
int64_t fileSize;
Version endVersion; // not meaningful for range files
Tuple pack() const {
return Tuple()
.append(version)
.append(StringRef(fileName))
.append(isRange)
.append(fileSize)
.append(blockSize)
.append(endVersion);
}
static RestoreFile unpack(Tuple const &t) {
RestoreFile r;
int i = 0;
r.version = t.getInt(i++);
r.fileName = t.getString(i++).toString();
r.isRange = t.getInt(i++) != 0;
r.fileSize = t.getInt(i++);
r.blockSize = t.getInt(i++);
r.endVersion = t.getInt(i++);
return r;
}
};
typedef KeyBackedSet<RestoreFile> FileSetT;
FileSetT fileSet() {
return configSpace.pack(LiteralStringRef(__FUNCTION__));
}
Future<bool> isRunnable(Reference<ReadYourWritesTransaction> tr) {
return map(stateEnum().getD(tr), [](ERestoreState s) -> bool { return s != ERestoreState::ABORTED
&& s != ERestoreState::COMPLETED
&& s != ERestoreState::UNITIALIZED;
});
}
Future<Void> logError(Database cx, Error e, std::string const &details, void *taskInstance = nullptr) {
if(!uid.isValid()) {
TraceEvent(SevError, "FileRestoreErrorNoUID").error(e).detail("Description", details);
return Void();
}
TraceEvent t(SevWarn, "FileRestoreError");
t.error(e).detail("RestoreUID", uid).detail("Description", details).detail("TaskInstance", (uint64_t)taskInstance);
// key_not_found could happen
if(e.code() == error_code_key_not_found)
t.backtrace();
return updateErrorInfo(cx, e, details);
}
Key mutationLogPrefix() {
return uidPrefixKey(applyLogKeys.begin, uid);
}
Key applyMutationsMapPrefix() {
return uidPrefixKey(applyMutationsKeyVersionMapRange.begin, uid);
}
ACTOR static Future<int64_t> getApplyVersionLag_impl(Reference<ReadYourWritesTransaction> tr, UID uid) {
// Both of these are snapshot reads
state Future<Optional<Value>> beginVal = tr->get(uidPrefixKey(applyMutationsBeginRange.begin, uid), true);
state Future<Optional<Value>> endVal = tr->get(uidPrefixKey(applyMutationsEndRange.begin, uid), true);
wait(success(beginVal) && success(endVal));
if(!beginVal.get().present() || !endVal.get().present())
return 0;
Version beginVersion = BinaryReader::fromStringRef<Version>(beginVal.get().get(), Unversioned());
Version endVersion = BinaryReader::fromStringRef<Version>(endVal.get().get(), Unversioned());
return endVersion - beginVersion;
}
Future<int64_t> getApplyVersionLag(Reference<ReadYourWritesTransaction> tr) {
return getApplyVersionLag_impl(tr, uid);
}
void initApplyMutations(Reference<ReadYourWritesTransaction> tr, Key addPrefix, Key removePrefix) {
// Set these because they have to match the applyMutations values.
this->addPrefix().set(tr, addPrefix);
this->removePrefix().set(tr, removePrefix);
clearApplyMutationsKeys(tr);
// Initialize add/remove prefix, range version map count and set the map's start key to InvalidVersion
tr->set(uidPrefixKey(applyMutationsAddPrefixRange.begin, uid), addPrefix);
tr->set(uidPrefixKey(applyMutationsRemovePrefixRange.begin, uid), removePrefix);
int64_t startCount = 0;
tr->set(uidPrefixKey(applyMutationsKeyVersionCountRange.begin, uid), StringRef((uint8_t*)&startCount, 8));
Key mapStart = uidPrefixKey(applyMutationsKeyVersionMapRange.begin, uid);
tr->set(mapStart, BinaryWriter::toValue<Version>(invalidVersion, Unversioned()));
}
void clearApplyMutationsKeys(Reference<ReadYourWritesTransaction> tr) {
tr->setOption(FDBTransactionOptions::COMMIT_ON_FIRST_PROXY);
// Clear add/remove prefix keys
tr->clear(uidPrefixKey(applyMutationsAddPrefixRange.begin, uid));
tr->clear(uidPrefixKey(applyMutationsRemovePrefixRange.begin, uid));
// Clear range version map and count key
tr->clear(uidPrefixKey(applyMutationsKeyVersionCountRange.begin, uid));
Key mapStart = uidPrefixKey(applyMutationsKeyVersionMapRange.begin, uid);
tr->clear(KeyRangeRef(mapStart, strinc(mapStart)));
// Clear any loaded mutations that have not yet been applied
Key mutationPrefix = mutationLogPrefix();
tr->clear(KeyRangeRef(mutationPrefix, strinc(mutationPrefix)));
// Clear end and begin versions (intentionally in this order)
tr->clear(uidPrefixKey(applyMutationsEndRange.begin, uid));
tr->clear(uidPrefixKey(applyMutationsBeginRange.begin, uid));
}
void setApplyBeginVersion(Reference<ReadYourWritesTransaction> tr, Version ver) {
tr->set(uidPrefixKey(applyMutationsBeginRange.begin, uid), BinaryWriter::toValue(ver, Unversioned()));
}
void setApplyEndVersion(Reference<ReadYourWritesTransaction> tr, Version ver) {
tr->set(uidPrefixKey(applyMutationsEndRange.begin, uid), BinaryWriter::toValue(ver, Unversioned()));
}
Future<Version> getApplyEndVersion(Reference<ReadYourWritesTransaction> tr) {
return map(tr->get(uidPrefixKey(applyMutationsEndRange.begin, uid)), [=](Optional<Value> const &value) -> Version {
return value.present() ? BinaryReader::fromStringRef<Version>(value.get(), Unversioned()) : 0;
});
}
ACTOR static Future<std::string> getProgress_impl(RestoreConfig restore, Reference<ReadYourWritesTransaction> tr);
Future<std::string> getProgress(Reference<ReadYourWritesTransaction> tr) { return getProgress_impl(*this, tr); }
ACTOR static Future<std::string> getFullStatus_impl(RestoreConfig restore, Reference<ReadYourWritesTransaction> tr);
Future<std::string> getFullStatus(Reference<ReadYourWritesTransaction> tr) { return getFullStatus_impl(*this, tr); }
};
typedef RestoreConfig::RestoreFile RestoreFile;
ACTOR Future<std::string> RestoreConfig::getProgress_impl(RestoreConfig restore, Reference<ReadYourWritesTransaction> tr) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Future<int64_t> fileCount = restore.fileCount().getD(tr);
state Future<int64_t> fileBlockCount = restore.fileBlockCount().getD(tr);
state Future<int64_t> fileBlocksDispatched = restore.filesBlocksDispatched().getD(tr);
state Future<int64_t> fileBlocksFinished = restore.fileBlocksFinished().getD(tr);
state Future<int64_t> bytesWritten = restore.bytesWritten().getD(tr);
state Future<StringRef> status = restore.stateText(tr);
state Future<Version> lag = restore.getApplyVersionLag(tr);
state Future<std::string> tag = restore.tag().getD(tr);
state Future<std::pair<std::string, Version>> lastError = restore.lastError().getD(tr);
// restore might no longer be valid after the first wait so make sure it is not needed anymore.
state UID uid = restore.getUid();
wait(success(fileCount) && success(fileBlockCount) && success(fileBlocksDispatched) && success(fileBlocksFinished) && success(bytesWritten) && success(status) && success(lag) && success(tag) && success(lastError));
std::string errstr = "None";
if(lastError.get().second != 0)
errstr = format("'%s' %" PRId64 "s ago.\n", lastError.get().first.c_str(), (tr->getReadVersion().get() - lastError.get().second) / CLIENT_KNOBS->CORE_VERSIONSPERSECOND );
TraceEvent("FileRestoreProgress")
.detail("RestoreUID", uid)
.detail("Tag", tag.get())
.detail("State", status.get().toString())
.detail("FileCount", fileCount.get())
.detail("FileBlocksFinished", fileBlocksFinished.get())
.detail("FileBlocksTotal", fileBlockCount.get())
.detail("FileBlocksInProgress", fileBlocksDispatched.get() - fileBlocksFinished.get())
.detail("BytesWritten", bytesWritten.get())
.detail("ApplyLag", lag.get())
.detail("TaskInstance", THIS_ADDR);
return format("Tag: %s UID: %s State: %s Blocks: %lld/%lld BlocksInProgress: %lld Files: %lld BytesWritten: %lld ApplyVersionLag: %lld LastError: %s",
tag.get().c_str(),
uid.toString().c_str(),
status.get().toString().c_str(),
fileBlocksFinished.get(),
fileBlockCount.get(),
fileBlocksDispatched.get() - fileBlocksFinished.get(),
fileCount.get(),
bytesWritten.get(),
lag.get(),
errstr.c_str()
);
}
ACTOR Future<std::string> RestoreConfig::getFullStatus_impl(RestoreConfig restore, Reference<ReadYourWritesTransaction> tr) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Future<std::vector<KeyRange>> ranges = restore.getRestoreRangesOrDefault(tr);
state Future<Key> addPrefix = restore.addPrefix().getD(tr);
state Future<Key> removePrefix = restore.removePrefix().getD(tr);
state Future<Key> url = restore.sourceContainerURL().getD(tr);
state Future<Version> restoreVersion = restore.restoreVersion().getD(tr);
state Future<std::string> progress = restore.getProgress(tr);
// restore might no longer be valid after the first wait so make sure it is not needed anymore.
wait(success(ranges) && success(addPrefix) && success(removePrefix) && success(url) && success(restoreVersion) && success(progress));
std::string returnStr;
returnStr = format("%s URL: %s", progress.get().c_str(), url.get().toString().c_str());
for (auto &range : ranges.get()) {
returnStr += format(" Range: '%s'-'%s'", printable(range.begin).c_str(), printable(range.end).c_str());
}
returnStr += format(" AddPrefix: '%s' RemovePrefix: '%s' Version: %lld",
printable(addPrefix.get()).c_str(),
printable(removePrefix.get()).c_str(),
restoreVersion.get()
);
return returnStr;
}
FileBackupAgent::FileBackupAgent()
: subspace(Subspace(fileBackupPrefixRange.begin))
// The other subspaces have logUID -> value
, config(subspace.get(BackupAgentBase::keyConfig))
, lastRestorable(subspace.get(FileBackupAgent::keyLastRestorable))
, taskBucket(new TaskBucket(subspace.get(BackupAgentBase::keyTasks), true, false, true))
, futureBucket(new FutureBucket(subspace.get(BackupAgentBase::keyFutures), true, true))
{
}
namespace fileBackup {
// Return a block of contiguous padding bytes, growing if needed.
Value makePadding(int size) {
static Value pad;
if(pad.size() < size) {
pad = makeString(size);
memset(mutateString(pad), '\xff', pad.size());
}
return pad.substr(0, size);
}
// File Format handlers.
// Both Range and Log formats are designed to be readable starting at any 1MB boundary
// so they can be read in parallel.
//
// Writer instances must be kept alive while any member actors are in progress.
//
// RangeFileWriter must be used as follows:
// 1 - writeKey(key) the queried key range begin
// 2 - writeKV(k, v) each kv pair to restore
// 3 - writeKey(key) the queried key range end
//
// RangeFileWriter will insert the required padding, header, and extra
// end/begin keys around the 1MB boundaries as needed.
//
// Example:
// The range a-z is queries and returns c-j which covers 3 blocks.
// The client code writes keys in this sequence:
// a c d e f g h i j z
//
// H = header P = padding a...z = keys v = value | = block boundary
//
// Encoded file: H a cv dv ev P | H e ev fv gv hv P | H h hv iv jv z
// Decoded in blocks yields:
// Block 1: range [a, e) with kv pairs cv, dv
// Block 2: range [e, h) with kv pairs ev, fv, gv
// Block 3: range [h, z) with kv pairs hv, iv, jv
//
// NOTE: All blocks except for the final block will have one last
// value which will not be used. This isn't actually a waste since
// if the next KV pair wouldn't fit within the block after the value
// then the space after the final key to the next 1MB boundary would
// just be padding anyway.
struct RangeFileWriter {
RangeFileWriter(Reference<IBackupFile> file = Reference<IBackupFile>(), int blockSize = 0)
: file(file), blockSize(blockSize), blockEnd(0), fileVersion(BACKUP_AGENT_SNAPSHOT_FILE_VERSION) {}
// Handles the first block and internal blocks. Ends current block if needed.
// The final flag is used in simulation to pad the file's final block to a whole block size
ACTOR static Future<Void> newBlock(RangeFileWriter *self, int bytesNeeded, bool final = false) {
// Write padding to finish current block if needed
int bytesLeft = self->blockEnd - self->file->size();
if(bytesLeft > 0) {
state Value paddingFFs = makePadding(bytesLeft);
wait(self->file->append(paddingFFs.begin(), bytesLeft));
}
if(final) {
ASSERT(g_network->isSimulated());
return Void();
}
// Set new blockEnd
self->blockEnd += self->blockSize;
// write Header
wait(self->file->append((uint8_t *)&self->fileVersion, sizeof(self->fileVersion)));
// If this is NOT the first block then write duplicate stuff needed from last block
if(self->blockEnd > self->blockSize) {
wait(self->file->appendStringRefWithLen(self->lastKey));
wait(self->file->appendStringRefWithLen(self->lastKey));
wait(self->file->appendStringRefWithLen(self->lastValue));
}
// There must now be room in the current block for bytesNeeded or the block size is too small
if(self->file->size() + bytesNeeded > self->blockEnd)
throw backup_bad_block_size();
return Void();
}
// Used in simulation only to create backup file sizes which are an integer multiple of the block size
Future<Void> padEnd() {
ASSERT(g_network->isSimulated());
if(file->size() > 0) {
return newBlock(this, 0, true);
}
return Void();
}
// Ends the current block if necessary based on bytesNeeded.
Future<Void> newBlockIfNeeded(int bytesNeeded) {
if(file->size() + bytesNeeded > blockEnd)
return newBlock(this, bytesNeeded);
return Void();
}
// Start a new block if needed, then write the key and value
ACTOR static Future<Void> writeKV_impl(RangeFileWriter *self, Key k, Value v) {
int toWrite = sizeof(int32_t) + k.size() + sizeof(int32_t) + v.size();
wait(self->newBlockIfNeeded(toWrite));
wait(self->file->appendStringRefWithLen(k));
wait(self->file->appendStringRefWithLen(v));
self->lastKey = k;
self->lastValue = v;
return Void();
}
Future<Void> writeKV(Key k, Value v) { return writeKV_impl(this, k, v); }
// Write begin key or end key.
ACTOR static Future<Void> writeKey_impl(RangeFileWriter *self, Key k) {
int toWrite = sizeof(uint32_t) + k.size();
wait(self->newBlockIfNeeded(toWrite));
wait(self->file->appendStringRefWithLen(k));
return Void();
}
Future<Void> writeKey(Key k) { return writeKey_impl(this, k); }
Reference<IBackupFile> file;
int blockSize;
private:
int64_t blockEnd;
uint32_t fileVersion;
Key lastKey;
Key lastValue;
};
ACTOR Future<Standalone<VectorRef<KeyValueRef>>> decodeRangeFileBlock(Reference<IAsyncFile> file, int64_t offset, int len) {
state Standalone<StringRef> buf = makeString(len);
int rLen = wait(file->read(mutateString(buf), len, offset));
if(rLen != len)
throw restore_bad_read();
Standalone<VectorRef<KeyValueRef>> results({}, buf.arena());
state StringRefReader reader(buf, restore_corrupted_data());
try {
// Read header, currently only decoding BACKUP_AGENT_SNAPSHOT_FILE_VERSION
if(reader.consume<int32_t>() != BACKUP_AGENT_SNAPSHOT_FILE_VERSION)
throw restore_unsupported_file_version();
// Read begin key, if this fails then block was invalid.
uint32_t kLen = reader.consumeNetworkUInt32();
const uint8_t *k = reader.consume(kLen);
results.push_back(results.arena(), KeyValueRef(KeyRef(k, kLen), ValueRef()));
// Read kv pairs and end key
while(1) {
// Read a key.
kLen = reader.consumeNetworkUInt32();
k = reader.consume(kLen);
// If eof reached or first value len byte is 0xFF then a valid block end was reached.
if(reader.eof() || *reader.rptr == 0xFF) {
results.push_back(results.arena(), KeyValueRef(KeyRef(k, kLen), ValueRef()));
break;
}
// Read a value, which must exist or the block is invalid
uint32_t vLen = reader.consumeNetworkUInt32();
const uint8_t *v = reader.consume(vLen);
results.push_back(results.arena(), KeyValueRef(KeyRef(k, kLen), ValueRef(v, vLen)));
// If eof reached or first byte of next key len is 0xFF then a valid block end was reached.
if(reader.eof() || *reader.rptr == 0xFF)
break;
}
// Make sure any remaining bytes in the block are 0xFF
for(auto b : reader.remainder())
if(b != 0xFF)
throw restore_corrupted_data_padding();
return results;
} catch(Error &e) {
TraceEvent(SevWarn, "FileRestoreCorruptRangeFileBlock")
.error(e)
.detail("Filename", file->getFilename())
.detail("BlockOffset", offset)
.detail("BlockLen", len)
.detail("ErrorRelativeOffset", reader.rptr - buf.begin())
.detail("ErrorAbsoluteOffset", reader.rptr - buf.begin() + offset);
throw;
}
}
// Very simple format compared to KeyRange files.
// Header, [Key, Value]... Key len
struct LogFileWriter {
static const std::string &FFs;
LogFileWriter(Reference<IBackupFile> file = Reference<IBackupFile>(), int blockSize = 0)
: file(file), blockSize(blockSize), blockEnd(0) {}
// Start a new block if needed, then write the key and value
ACTOR static Future<Void> writeKV_impl(LogFileWriter *self, Key k, Value v) {
// If key and value do not fit in this block, end it and start a new one
int toWrite = sizeof(int32_t) + k.size() + sizeof(int32_t) + v.size();
if(self->file->size() + toWrite > self->blockEnd) {
// Write padding if needed
int bytesLeft = self->blockEnd - self->file->size();
if(bytesLeft > 0) {
state Value paddingFFs = makePadding(bytesLeft);
wait(self->file->append(paddingFFs.begin(), bytesLeft));
}
// Set new blockEnd
self->blockEnd += self->blockSize;
// write the block header
wait(self->file->append((uint8_t *)&BACKUP_AGENT_MLOG_VERSION, sizeof(BACKUP_AGENT_MLOG_VERSION)));
}
wait(self->file->appendStringRefWithLen(k));
wait(self->file->appendStringRefWithLen(v));
// At this point we should be in whatever the current block is or the block size is too small
if(self->file->size() > self->blockEnd)
throw backup_bad_block_size();
return Void();
}
Future<Void> writeKV(Key k, Value v) { return writeKV_impl(this, k, v); }
Reference<IBackupFile> file;
int blockSize;
private:
int64_t blockEnd;
};
ACTOR Future<Standalone<VectorRef<KeyValueRef>>> decodeLogFileBlock(Reference<IAsyncFile> file, int64_t offset, int len) {
state Standalone<StringRef> buf = makeString(len);
int rLen = wait(file->read(mutateString(buf), len, offset));
if(rLen != len)
throw restore_bad_read();
Standalone<VectorRef<KeyValueRef>> results({}, buf.arena());
state StringRefReader reader(buf, restore_corrupted_data());
try {
// Read header, currently only decoding version BACKUP_AGENT_MLOG_VERSION
if(reader.consume<int32_t>() != BACKUP_AGENT_MLOG_VERSION)
throw restore_unsupported_file_version();
// Read k/v pairs. Block ends either at end of last value exactly or with 0xFF as first key len byte.
while(1) {
// If eof reached or first key len bytes is 0xFF then end of block was reached.
if(reader.eof() || *reader.rptr == 0xFF)
break;
// Read key and value. If anything throws then there is a problem.
uint32_t kLen = reader.consumeNetworkUInt32();
const uint8_t *k = reader.consume(kLen);
uint32_t vLen = reader.consumeNetworkUInt32();
const uint8_t *v = reader.consume(vLen);
results.push_back(results.arena(), KeyValueRef(KeyRef(k, kLen), ValueRef(v, vLen)));
}
// Make sure any remaining bytes in the block are 0xFF
for(auto b : reader.remainder())
if(b != 0xFF)
throw restore_corrupted_data_padding();
return results;
} catch(Error &e) {
TraceEvent(SevWarn, "FileRestoreCorruptLogFileBlock")
.error(e)
.detail("Filename", file->getFilename())
.detail("BlockOffset", offset)
.detail("BlockLen", len)
.detail("ErrorRelativeOffset", reader.rptr - buf.begin())
.detail("ErrorAbsoluteOffset", reader.rptr - buf.begin() + offset);
throw;
}
}
ACTOR Future<Void> checkTaskVersion(Database cx, Reference<Task> task, StringRef name, uint32_t version) {
uint32_t taskVersion = task->getVersion();
if (taskVersion > version) {
state Error err = task_invalid_version();
TraceEvent(SevWarn, "BA_BackupRangeTaskFuncExecute").detail("TaskVersion", taskVersion).detail("Name", name).detail("Version", version);
if (KeyBackedConfig::TaskParams.uid().exists(task)) {
std::string msg = format("%s task version `%lu' is greater than supported version `%lu'", task->params[Task::reservedTaskParamKeyType].toString().c_str(), (unsigned long)taskVersion, (unsigned long)version);
wait(BackupConfig(task).logError(cx, err, msg));
}
throw err;
}
return Void();
}
ACTOR static Future<Void> abortFiveZeroBackup(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr, std::string tagName) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Subspace tagNames = backupAgent->subspace.get(BackupAgentBase::keyTagName);
Optional<Value> uidStr = wait(tr->get(tagNames.pack(Key(tagName))));
if (!uidStr.present()) {
TraceEvent(SevWarn, "FileBackupAbortIncompatibleBackup_TagNotFound").detail("TagName", tagName.c_str());
return Void();
}
state UID uid = BinaryReader::fromStringRef<UID>(uidStr.get(), Unversioned());
state Subspace statusSpace = backupAgent->subspace.get(BackupAgentBase::keyStates).get(uid.toString());
state Subspace globalConfig = backupAgent->subspace.get(BackupAgentBase::keyConfig).get(uid.toString());
state Subspace newConfigSpace = uidPrefixKey(LiteralStringRef("uid->config/").withPrefix(fileBackupPrefixRange.begin), uid);
Optional<Value> statusStr = wait(tr->get(statusSpace.pack(FileBackupAgent::keyStateStatus)));
state EBackupState status = !statusStr.present() ? FileBackupAgent::STATE_NEVERRAN : BackupAgentBase::getState(statusStr.get().toString());
TraceEvent(SevInfo, "FileBackupAbortIncompatibleBackup")
.detail("TagName", tagName.c_str())
.detail("Status", BackupAgentBase::getStateText(status));
// Clear the folder id to prevent future tasks from executing at all
tr->clear(singleKeyRange(StringRef(globalConfig.pack(FileBackupAgent::keyFolderId))));
// Clear the mutations logging config and data
Key configPath = uidPrefixKey(logRangesRange.begin, uid);
Key logsPath = uidPrefixKey(backupLogKeys.begin, uid);
tr->clear(KeyRangeRef(configPath, strinc(configPath)));
tr->clear(KeyRangeRef(logsPath, strinc(logsPath)));
// Clear the new-style config space
tr->clear(newConfigSpace.range());
Key statusKey = StringRef(statusSpace.pack(FileBackupAgent::keyStateStatus));
// Set old style state key to Aborted if it was Runnable
if(backupAgent->isRunnable(status))
tr->set(statusKey, StringRef(FileBackupAgent::getStateText(BackupAgentBase::STATE_ABORTED)));
return Void();
}
struct AbortFiveZeroBackupTask : TaskFuncBase {
static StringRef name;
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state FileBackupAgent backupAgent;
state std::string tagName = task->params[BackupAgentBase::keyConfigBackupTag].toString();
TEST(true); // Canceling old backup task
TraceEvent(SevInfo, "FileBackupCancelOldTask")
.detail("Task", task->params[Task::reservedTaskParamKeyType])
.detail("TagName", tagName);
wait(abortFiveZeroBackup(&backupAgent, tr, tagName));
wait(taskBucket->finish(tr, task));
return Void();
}
virtual StringRef getName() const {
TraceEvent(SevError, "FileBackupError").detail("Cause", "AbortFiveZeroBackupTaskFunc::name() should never be called");
ASSERT(false);
return StringRef();
}
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Future<Void>(Void()); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef AbortFiveZeroBackupTask::name = LiteralStringRef("abort_legacy_backup");
REGISTER_TASKFUNC(AbortFiveZeroBackupTask);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_backup_diff_logs);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_backup_log_range);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_backup_logs);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_backup_range);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_backup_restorable);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_finish_full_backup);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_finished_full_backup);
REGISTER_TASKFUNC_ALIAS(AbortFiveZeroBackupTask, file_start_full_backup);
ACTOR static Future<Void> abortFiveOneBackup(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr, std::string tagName) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag = makeBackupTag(tagName);
state UidAndAbortedFlagT current = wait(tag.getOrThrow(tr, false, backup_unneeded()));
state BackupConfig config(current.first);
EBackupState status = wait(config.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
if (!backupAgent->isRunnable((BackupAgentBase::enumState)status)) {
throw backup_unneeded();
}
TraceEvent(SevInfo, "FBA_AbortFileOneBackup")
.detail("TagName", tagName.c_str())
.detail("Status", BackupAgentBase::getStateText(status));
// Cancel backup task through tag
wait(tag.cancel(tr));
Key configPath = uidPrefixKey(logRangesRange.begin, config.getUid());
Key logsPath = uidPrefixKey(backupLogKeys.begin, config.getUid());
tr->clear(KeyRangeRef(configPath, strinc(configPath)));
tr->clear(KeyRangeRef(logsPath, strinc(logsPath)));
config.stateEnum().set(tr, EBackupState::STATE_ABORTED);
return Void();
}
struct AbortFiveOneBackupTask : TaskFuncBase {
static StringRef name;
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state FileBackupAgent backupAgent;
state BackupConfig config(task);
state std::string tagName = wait(config.tag().getOrThrow(tr));
TEST(true); // Canceling 5.1 backup task
TraceEvent(SevInfo, "FileBackupCancelFiveOneTask")
.detail("Task", task->params[Task::reservedTaskParamKeyType])
.detail("TagName", tagName);
wait(abortFiveOneBackup(&backupAgent, tr, tagName));
wait(taskBucket->finish(tr, task));
return Void();
}
virtual StringRef getName() const {
TraceEvent(SevError, "FileBackupError").detail("Cause", "AbortFiveOneBackupTaskFunc::name() should never be called");
ASSERT(false);
return StringRef();
}
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Future<Void>(Void()); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef AbortFiveOneBackupTask::name = LiteralStringRef("abort_legacy_backup_5.2");
REGISTER_TASKFUNC(AbortFiveOneBackupTask);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_write_range);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_dispatch_ranges);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_write_logs);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_erase_logs);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_dispatch_logs);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_finished);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_write_snapshot_manifest);
REGISTER_TASKFUNC_ALIAS(AbortFiveOneBackupTask, file_backup_start);
std::function<void(Reference<Task>)> NOP_SETUP_TASK_FN = [](Reference<Task> task) { /* NOP */ };
ACTOR static Future<Key> addBackupTask(StringRef name,
uint32_t version,
Reference<ReadYourWritesTransaction> tr,
Reference<TaskBucket> taskBucket,
TaskCompletionKey completionKey,
BackupConfig config,
Reference<TaskFuture> waitFor = Reference<TaskFuture>(),
std::function<void(Reference<Task>)> setupTaskFn = NOP_SETUP_TASK_FN,
int priority = 0,
bool setValidation = true) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
Key doneKey = wait(completionKey.get(tr, taskBucket));
state Reference<Task> task(new Task(name, version, doneKey, priority));
// Bind backup config to new task
wait(config.toTask(tr, task, setValidation));
// Set task specific params
setupTaskFn(task);
if (!waitFor) {
return taskBucket->addTask(tr, task);
}
wait(waitFor->onSetAddTask(tr, taskBucket, task));
return LiteralStringRef("OnSetAddTask");
}
// Clears the backup ID from "backupStartedKey" to pause backup workers.
ACTOR static Future<Void> clearBackupStartID(Reference<ReadYourWritesTransaction> tr, UID backupUid) {
// If backup worker is not enabled, exit early.
Optional<Value> started = wait(tr->get(backupStartedKey));
std::vector<std::pair<UID, Version>> ids;
if (started.present()) {
ids = decodeBackupStartedValue(started.get());
}
auto it = std::find_if(ids.begin(), ids.end(),
[=](const std::pair<UID, Version>& p) { return p.first == backupUid; });
if (it != ids.end()) {
ids.erase(it);
}
if (ids.empty()) {
TraceEvent("ClearBackup").detail("BackupID", backupUid);
tr->clear(backupStartedKey);
} else {
tr->set(backupStartedKey, encodeBackupStartedValue(ids));
}
return Void();
}
// Backup and Restore taskFunc definitions will inherit from one of the following classes which
// servers to catch and log to the appropriate config any error that execute/finish didn't catch and log.
struct RestoreTaskFuncBase : TaskFuncBase {
virtual Future<Void> handleError(Database cx, Reference<Task> task, Error const &error) {
return RestoreConfig(task).logError(cx, error, format("'%s' on '%s'", error.what(), task->params[Task::reservedTaskParamKeyType].printable().c_str()));
}
virtual std::string toString(Reference<Task> task)
{
return "";
}
};
struct BackupTaskFuncBase : TaskFuncBase {
virtual Future<Void> handleError(Database cx, Reference<Task> task, Error const &error) {
return BackupConfig(task).logError(cx, error, format("'%s' on '%s'", error.what(), task->params[Task::reservedTaskParamKeyType].printable().c_str()));
}
virtual std::string toString(Reference<Task> task)
{
return "";
}
};
ACTOR static Future<Standalone<VectorRef<KeyRef>>> getBlockOfShards(Reference<ReadYourWritesTransaction> tr, Key beginKey, Key endKey, int limit) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Standalone<VectorRef<KeyRef>> results;
Standalone<RangeResultRef> values = wait(tr->getRange(KeyRangeRef(keyAfter(beginKey.withPrefix(keyServersPrefix)), endKey.withPrefix(keyServersPrefix)), limit));
for (auto &s : values) {
KeyRef k = s.key.removePrefix(keyServersPrefix);
results.push_back_deep(results.arena(), k);
}
return results;
}
struct BackupRangeTaskFunc : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
static TaskParam<Key> beginKey() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<Key> endKey() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<bool> addBackupRangeTasks() {
return LiteralStringRef(__FUNCTION__);
}
} Params;
std::string toString(Reference<Task> task) {
return format("beginKey '%s' endKey '%s' addTasks %d",
Params.beginKey().get(task).printable().c_str(),
Params.endKey().get(task).printable().c_str(),
Params.addBackupRangeTasks().get(task)
);
}
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
// Finish (which flushes/syncs) the file, and then in a single transaction, make some range backup progress durable.
// This means:
// - increment the backup config's range bytes written
// - update the range file map
// - update the task begin key
// - save/extend the task with the new params
// Returns whether or not the caller should continue executing the task.
ACTOR static Future<bool> finishRangeFile(Reference<IBackupFile> file, Database cx, Reference<Task> task, Reference<TaskBucket> taskBucket, KeyRange range, Version version) {
wait(file->finish());
// Ignore empty ranges.
if(range.empty())
return false;
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
state BackupConfig backup(task);
state bool usedFile = false;
// Avoid unnecessary conflict by prevent taskbucket's automatic timeout extension
// because the following transaction loop extends and updates the task.
wait(task->extendMutex.take());
state FlowLock::Releaser releaser(task->extendMutex, 1);
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
// Update the start key of the task so if this transaction completes but the task then fails
// when it is restarted it will continue where this execution left off.
Params.beginKey().set(task, range.end);
// Save and extend the task with the new begin parameter
state Version newTimeout = wait(taskBucket->extendTimeout(tr, task, true));
// Update the range bytes written in the backup config
backup.rangeBytesWritten().atomicOp(tr, file->size(), MutationRef::AddValue);
backup.snapshotRangeFileCount().atomicOp(tr, 1, MutationRef::AddValue);
// See if there is already a file for this key which has an earlier begin, update the map if not.
Optional<BackupConfig::RangeSlice> s = wait(backup.snapshotRangeFileMap().get(tr, range.end));
if(!s.present() || s.get().begin >= range.begin) {
backup.snapshotRangeFileMap().set(tr, range.end, {range.begin, version, file->getFileName(), file->size()});
usedFile = true;
}
wait(tr->commit());
task->timeoutVersion = newTimeout;
break;
} catch(Error &e) {
wait(tr->onError(e));
}
}
return usedFile;
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, int priority, Key begin, Key end, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>(), Version scheduledVersion = invalidVersion) {
Key key = wait(addBackupTask(BackupRangeTaskFunc::name,
BackupRangeTaskFunc::version,
tr, taskBucket, completionKey,
BackupConfig(parentTask),
waitFor,
[=](Reference<Task> task) {
Params.beginKey().set(task, begin);
Params.endKey().set(task, end);
Params.addBackupRangeTasks().set(task, false);
if(scheduledVersion != invalidVersion)
ReservedTaskParams::scheduledVersion().set(task, scheduledVersion);
},
priority));
return key;
}
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Reference<FlowLock> lock(new FlowLock(CLIENT_KNOBS->BACKUP_LOCK_BYTES));
wait(checkTaskVersion(cx, task, BackupRangeTaskFunc::name, BackupRangeTaskFunc::version));
state Key beginKey = Params.beginKey().get(task);
state Key endKey = Params.endKey().get(task);
TraceEvent("FileBackupRangeStart")
.suppressFor(60)
.detail("BackupUID", BackupConfig(task).getUid())
.detail("BeginKey", Params.beginKey().get(task).printable())
.detail("EndKey", Params.endKey().get(task).printable())
.detail("TaskKey", task->key.printable());
// When a key range task saves the last chunk of progress and then the executor dies, when the task continues
// its beginKey and endKey will be equal but there is no work to be done.
if(beginKey == endKey)
return Void();
// Find out if there is a shard boundary in(beginKey, endKey)
Standalone<VectorRef<KeyRef>> keys = wait(runRYWTransaction(cx, [=](Reference<ReadYourWritesTransaction> tr){ return getBlockOfShards(tr, beginKey, endKey, 1); }));
if (keys.size() > 0) {
Params.addBackupRangeTasks().set(task, true);
return Void();
}
// Read everything from beginKey to endKey, write it to an output file, run the output file processor, and
// then set on_done. If we are still writing after X seconds, end the output file and insert a new backup_range
// task for the remainder.
state Reference<IBackupFile> outFile;
state Version outVersion = invalidVersion;
state Key lastKey;
// retrieve kvData
state PromiseStream<RangeResultWithVersion> results;
state Future<Void> rc = readCommitted(cx, results, lock, KeyRangeRef(beginKey, endKey), true, true, true);
state RangeFileWriter rangeFile;
state BackupConfig backup(task);
// Don't need to check keepRunning(task) here because we will do that while finishing each output file, but if bc
// is false then clearly the backup is no longer in progress
state Reference<IBackupContainer> bc = wait(backup.backupContainer().getD(cx));
if(!bc) {
return Void();
}
state bool done = false;
state int64_t nrKeys = 0;
loop{
state RangeResultWithVersion values;
try {
RangeResultWithVersion _values = waitNext(results.getFuture());
values = _values;
lock->release(values.first.expectedSize());
} catch(Error &e) {
if(e.code() == error_code_end_of_stream)
done = true;
else
throw;
}
// If we've seen a new read version OR hit the end of the stream, then if we were writing a file finish it.
if (values.second != outVersion || done) {
if (outFile){
TEST(outVersion != invalidVersion); // Backup range task wrote multiple versions
state Key nextKey = done ? endKey : keyAfter(lastKey);
wait(rangeFile.writeKey(nextKey));
if(BUGGIFY) {
rangeFile.padEnd();
}
bool usedFile = wait(finishRangeFile(outFile, cx, task, taskBucket, KeyRangeRef(beginKey, nextKey), outVersion));
TraceEvent("FileBackupWroteRangeFile")
.suppressFor(60)
.detail("BackupUID", backup.getUid())
.detail("Size", outFile->size())
.detail("Keys", nrKeys)
.detail("ReadVersion", outVersion)
.detail("BeginKey", beginKey.printable())
.detail("EndKey", nextKey.printable())
.detail("AddedFileToMap", usedFile);
nrKeys = 0;
beginKey = nextKey;
}
if(done)
return Void();
// Start writing a new file after verifying this task should keep running as of a new read version (which must be >= outVersion)
outVersion = values.second;
// block size must be at least large enough for 3 max size keys and 2 max size values + overhead so 250k conservatively.
state int blockSize = BUGGIFY ? deterministicRandom()->randomInt(250e3, 4e6) : CLIENT_KNOBS->BACKUP_RANGEFILE_BLOCK_SIZE;
state Version snapshotBeginVersion;
state int64_t snapshotRangeFileCount;
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait(taskBucket->keepRunning(tr, task)
&& storeOrThrow(snapshotBeginVersion, backup.snapshotBeginVersion().get(tr))
&& store(snapshotRangeFileCount, backup.snapshotRangeFileCount().getD(tr))
);
break;
} catch(Error &e) {
wait(tr->onError(e));
}
}
Reference<IBackupFile> f = wait(bc->writeRangeFile(snapshotBeginVersion, snapshotRangeFileCount, outVersion, blockSize));
outFile = f;
// Initialize range file writer and write begin key
rangeFile = RangeFileWriter(outFile, blockSize);
wait(rangeFile.writeKey(beginKey));
}
// write kvData to file, update lastKey and key count
if(values.first.size() != 0) {
state size_t i = 0;
for (; i < values.first.size(); ++i) {
wait(rangeFile.writeKV(values.first[i].key, values.first[i].value));
}
lastKey = values.first.back().key;
nrKeys += values.first.size();
}
}
}
ACTOR static Future<Void> startBackupRangeInternal(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task, Reference<TaskFuture> onDone) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Key nextKey = Params.beginKey().get(task);
state Key endKey = Params.endKey().get(task);
state Standalone<VectorRef<KeyRef>> keys = wait(getBlockOfShards(tr, nextKey, endKey, CLIENT_KNOBS->BACKUP_SHARD_TASK_LIMIT));
std::vector<Future<Key>> addTaskVector;
for (int idx = 0; idx < keys.size(); ++idx) {
if (nextKey != keys[idx]) {
addTaskVector.push_back(addTask(tr, taskBucket, task, task->getPriority(), nextKey, keys[idx], TaskCompletionKey::joinWith(onDone)));
TraceEvent("FileBackupRangeSplit")
.suppressFor(60)
.detail("BackupUID", BackupConfig(task).getUid())
.detail("BeginKey", Params.beginKey().get(task).printable())
.detail("EndKey", Params.endKey().get(task).printable())
.detail("SliceBeginKey", nextKey.printable())
.detail("SliceEndKey", keys[idx].printable());
}
nextKey = keys[idx];
}
wait(waitForAll(addTaskVector));
if (nextKey != endKey) {
// Add task to cover nextKey to the end, using the priority of the current task
wait(success(addTask(tr, taskBucket, task, task->getPriority(), nextKey, endKey, TaskCompletionKey::joinWith(onDone), Reference<TaskFuture>(), task->getPriority())));
}
return Void();
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Reference<TaskFuture> taskFuture = futureBucket->unpack(task->params[Task::reservedTaskParamKeyDone]);
if (Params.addBackupRangeTasks().get(task)) {
wait(startBackupRangeInternal(tr, taskBucket, futureBucket, task, taskFuture));
}
else {
wait(taskFuture->set(tr, taskBucket));
}
wait(taskBucket->finish(tr, task));
TraceEvent("FileBackupRangeFinish")
.suppressFor(60)
.detail("BackupUID", BackupConfig(task).getUid())
.detail("BeginKey", Params.beginKey().get(task).printable())
.detail("EndKey", Params.endKey().get(task).printable())
.detail("TaskKey", task->key.printable());
return Void();
}
};
StringRef BackupRangeTaskFunc::name = LiteralStringRef("file_backup_write_range_5.2");
const uint32_t BackupRangeTaskFunc::version = 1;
REGISTER_TASKFUNC(BackupRangeTaskFunc);
struct BackupSnapshotDispatchTask : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
// Set by Execute, used by Finish
static TaskParam<int64_t> shardsBehind() {
return LiteralStringRef(__FUNCTION__);
}
// Set by Execute, used by Finish
static TaskParam<bool> snapshotFinished() {
return LiteralStringRef(__FUNCTION__);
}
// Set by Execute, used by Finish
static TaskParam<Version> nextDispatchVersion() {
return LiteralStringRef(__FUNCTION__);
}
} Params;
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, int priority, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>(), Version scheduledVersion = invalidVersion) {
Key key = wait(addBackupTask(name,
version,
tr, taskBucket, completionKey,
BackupConfig(parentTask),
waitFor,
[=](Reference<Task> task) {
if(scheduledVersion != invalidVersion)
ReservedTaskParams::scheduledVersion().set(task, scheduledVersion);
},
priority));
return key;
}
enum DispatchState { SKIP=0, DONE=1, NOT_DONE_MIN=2};
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Reference<FlowLock> lock(new FlowLock(CLIENT_KNOBS->BACKUP_LOCK_BYTES));
wait(checkTaskVersion(cx, task, name, version));
state double startTime = timer();
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
// The shard map will use 3 values classes. Exactly SKIP, exactly DONE, then any number >= NOT_DONE_MIN which will mean not done.
// This is to enable an efficient coalesce() call to squash adjacent ranges which are not yet finished to enable efficiently
// finding random database shards which are not done.
state int notDoneSequence = NOT_DONE_MIN;
state KeyRangeMap<int> shardMap(notDoneSequence++, normalKeys.end);
state Key beginKey = normalKeys.begin;
// Read all shard boundaries and add them to the map
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Future<Standalone<VectorRef<KeyRef>>> shardBoundaries = getBlockOfShards(tr, beginKey, normalKeys.end, CLIENT_KNOBS->TOO_MANY);
wait(success(shardBoundaries) && taskBucket->keepRunning(tr, task));
if(shardBoundaries.get().size() == 0)
break;
for(auto &boundary : shardBoundaries.get()) {
shardMap.rawInsert(boundary, notDoneSequence++);
}
beginKey = keyAfter(shardBoundaries.get().back());
tr->reset();
} catch(Error &e) {
wait(tr->onError(e));
}
}
// Read required stuff from backup config
state BackupConfig config(task);
state Version recentReadVersion;
state Version snapshotBeginVersion;
state Version snapshotTargetEndVersion;
state int64_t snapshotIntervalSeconds;
state Optional<Version> latestSnapshotEndVersion;
state std::vector<KeyRange> backupRanges;
state Optional<Key> snapshotBatchFutureKey;
state Reference<TaskFuture> snapshotBatchFuture;
state Optional<int64_t> snapshotBatchSize;
tr->reset();
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait( store(snapshotBeginVersion, config.snapshotBeginVersion().getOrThrow(tr))
&& store(snapshotTargetEndVersion, config.snapshotTargetEndVersion().getOrThrow(tr))
&& store(backupRanges, config.backupRanges().getOrThrow(tr))
&& store(snapshotIntervalSeconds, config.snapshotIntervalSeconds().getOrThrow(tr))
// The next two parameters are optional
&& store(snapshotBatchFutureKey, config.snapshotBatchFuture().get(tr))
&& store(snapshotBatchSize, config.snapshotBatchSize().get(tr))
&& store(latestSnapshotEndVersion, config.latestSnapshotEndVersion().get(tr))
&& store(recentReadVersion, tr->getReadVersion())
&& taskBucket->keepRunning(tr, task));
// If the snapshot batch future key does not exist, this is the first execution of this dispatch task so
// - create and set the snapshot batch future key
// - initialize the batch size to 0
// - initialize the target snapshot end version if it is not yet set
// - commit
if(!snapshotBatchFutureKey.present()) {
snapshotBatchFuture = futureBucket->future(tr);
config.snapshotBatchFuture().set(tr, snapshotBatchFuture->pack());
snapshotBatchSize = 0;
config.snapshotBatchSize().set(tr, snapshotBatchSize.get());
// The dispatch of this batch can take multiple separate executions if the executor fails
// so store a completion key for the dispatch finish() to set when dispatching the batch is done.
state TaskCompletionKey dispatchCompletionKey = TaskCompletionKey::joinWith(snapshotBatchFuture);
// this is a bad hack - but flow doesn't work well with lambda functions and caputring
// state variables...
auto cfg = &config;
auto tx = &tr;
wait(map(dispatchCompletionKey.get(tr, taskBucket), [cfg, tx](Key const& k) {
cfg->snapshotBatchDispatchDoneKey().set(*tx, k);
return Void();
}));
wait(tr->commit());
}
else {
ASSERT(snapshotBatchSize.present());
// Batch future key exists in the config so create future from it
snapshotBatchFuture = Reference<TaskFuture>(new TaskFuture(futureBucket, snapshotBatchFutureKey.get()));
}
break;
} catch(Error &e) {
wait(tr->onError(e));
}
}
// Read all dispatched ranges
state std::vector<std::pair<Key, bool>> dispatchBoundaries;
tr->reset();
beginKey = normalKeys.begin;
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Future<std::vector<std::pair<Key, bool>>> bounds = config.snapshotRangeDispatchMap().getRange(tr, beginKey, keyAfter(normalKeys.end), CLIENT_KNOBS->TOO_MANY);
wait(success(bounds) && taskBucket->keepRunning(tr, task) && store(recentReadVersion, tr->getReadVersion()));
if(bounds.get().empty())
break;
dispatchBoundaries.reserve(dispatchBoundaries.size() + bounds.get().size());
dispatchBoundaries.insert(dispatchBoundaries.end(), bounds.get().begin(), bounds.get().end());
beginKey = keyAfter(bounds.get().back().first);
tr->reset();
} catch(Error &e) {
wait(tr->onError(e));
}
}
// The next few sections involve combining the results above. Yields are used after operations
// that could have operated on many thousands of things and in loops which could have many
// thousands of iterations.
// Declare some common iterators which must be state vars and will be used multiple times.
state int i;
state RangeMap<Key, int, KeyRangeRef>::Iterator iShard;
state RangeMap<Key, int, KeyRangeRef>::Iterator iShardEnd;
// Set anything inside a dispatched range to DONE.
// Also ensure that the boundary value are true, false, [true, false]...
if(dispatchBoundaries.size() > 0) {
state bool lastValue = false;
state Key lastKey;
for(i = 0; i < dispatchBoundaries.size(); ++i) {
const std::pair<Key, bool> &boundary = dispatchBoundaries[i];
// Values must alternate
ASSERT(boundary.second == !lastValue);
// If this was the end of a dispatched range
if(!boundary.second) {
// Ensure that the dispatched boundaries exist AND set all shard ranges in the dispatched range to DONE.
RangeMap<Key, int, KeyRangeRef>::Ranges shardRanges = shardMap.modify(KeyRangeRef(lastKey, boundary.first));
iShard = shardRanges.begin();
iShardEnd = shardRanges.end();
for(; iShard != iShardEnd; ++iShard) {
iShard->value() = DONE;
wait(yield());
}
}
lastValue = dispatchBoundaries[i].second;
lastKey = dispatchBoundaries[i].first;
wait(yield());
}
ASSERT(lastValue == false);
}
// Set anything outside the backup ranges to SKIP. We can use insert() here instead of modify()
// because it's OK to delete shard boundaries in the skipped ranges.
if(backupRanges.size() > 0) {
shardMap.insert(KeyRangeRef(normalKeys.begin, backupRanges.front().begin), SKIP);
wait(yield());
for(i = 0; i < backupRanges.size() - 1; ++i) {
shardMap.insert(KeyRangeRef(backupRanges[i].end, backupRanges[i + 1].begin), SKIP);
wait(yield());
}
shardMap.insert(KeyRangeRef(backupRanges.back().end, normalKeys.end), SKIP);
wait(yield());
}
state int countShardsDone = 0;
state int countShardsNotDone = 0;
// Scan through the shard map, counting the DONE and NOT_DONE shards.
RangeMap<Key, int, KeyRangeRef>::Ranges shardRanges = shardMap.ranges();
iShard = shardRanges.begin();
iShardEnd = shardRanges.end();
for(; iShard != iShardEnd; ++iShard) {
if(iShard->value() == DONE) {
++countShardsDone;
}
else if(iShard->value() >= NOT_DONE_MIN)
++countShardsNotDone;
wait(yield());
}
// Coalesce the shard map to make random selection below more efficient.
shardMap.coalesce(normalKeys);
wait(yield());
// In this context "all" refers to all of the shards relevant for this particular backup
state int countAllShards = countShardsDone + countShardsNotDone;
if(countShardsNotDone == 0) {
TraceEvent("FileBackupSnapshotDispatchFinished")
.detail("BackupUID", config.getUid())
.detail("AllShards", countAllShards)
.detail("ShardsDone", countShardsDone)
.detail("ShardsNotDone", countShardsNotDone)
.detail("SnapshotBeginVersion", snapshotBeginVersion)
.detail("SnapshotTargetEndVersion", snapshotTargetEndVersion)
.detail("CurrentVersion", recentReadVersion)
.detail("SnapshotIntervalSeconds", snapshotIntervalSeconds);
Params.snapshotFinished().set(task, true);
return Void();
}
// Decide when the next snapshot dispatch should run.
state Version nextDispatchVersion;
// In simulation, use snapshot interval / 5 to ensure multiple dispatches run
// Otherwise, use the knob for the number of seconds between snapshot dispatch tasks.
if(g_network->isSimulated())
nextDispatchVersion = recentReadVersion + CLIENT_KNOBS->CORE_VERSIONSPERSECOND * (snapshotIntervalSeconds / 5.0);
else
nextDispatchVersion = recentReadVersion + CLIENT_KNOBS->CORE_VERSIONSPERSECOND * CLIENT_KNOBS->BACKUP_SNAPSHOT_DISPATCH_INTERVAL_SEC;
// If nextDispatchVersion is greater than snapshotTargetEndVersion (which could be in the past) then just use
// the greater of recentReadVersion or snapshotTargetEndVersion. Any range tasks created in this dispatch will
// be scheduled at a random time between recentReadVersion and nextDispatchVersion,
// so nextDispatchVersion shouldn't be less than recentReadVersion.
if(nextDispatchVersion > snapshotTargetEndVersion)
nextDispatchVersion = std::max(recentReadVersion, snapshotTargetEndVersion);
Params.nextDispatchVersion().set(task, nextDispatchVersion);
// Calculate number of shards that should be done before the next interval end
// timeElapsed is between 0 and 1 and represents what portion of the shards we should have completed by now
double timeElapsed;
Version snapshotScheduledVersionInterval = snapshotTargetEndVersion - snapshotBeginVersion;
if(snapshotTargetEndVersion > snapshotBeginVersion)
timeElapsed = std::min(1.0, (double)(nextDispatchVersion - snapshotBeginVersion) / (snapshotScheduledVersionInterval));
else
timeElapsed = 1.0;
state int countExpectedShardsDone = countAllShards * timeElapsed;
state int countShardsToDispatch = std::max<int>(0, countExpectedShardsDone - countShardsDone);
// Calculate the number of shards that would have been dispatched by a normal (on-schedule) BackupSnapshotDispatchTask given
// the dispatch window and the start and expected-end versions of the current snapshot.
int64_t dispatchWindow = nextDispatchVersion - recentReadVersion;
// If the scheduled snapshot interval is 0 (such as for initial, as-fast-as-possible snapshot) then all shards are considered late
int countShardsExpectedPerNormalWindow;
if(snapshotScheduledVersionInterval == 0) {
countShardsExpectedPerNormalWindow = 0;
}
else {
// A dispatchWindow of 0 means the target end version is <= now which also results in all shards being considered late
countShardsExpectedPerNormalWindow = (double(dispatchWindow) / snapshotScheduledVersionInterval) * countAllShards;
}
// The number of shards 'behind' the snapshot is the count of how may additional shards beyond normal are being dispatched, if any.
int countShardsBehind = std::max<int64_t>(0, countShardsToDispatch + snapshotBatchSize.get() - countShardsExpectedPerNormalWindow);
Params.shardsBehind().set(task, countShardsBehind);
TraceEvent("FileBackupSnapshotDispatchStats")
.detail("BackupUID", config.getUid())
.detail("AllShards", countAllShards)
.detail("ShardsDone", countShardsDone)
.detail("ShardsNotDone", countShardsNotDone)
.detail("ExpectedShardsDone", countExpectedShardsDone)
.detail("ShardsToDispatch", countShardsToDispatch)
.detail("ShardsBehind", countShardsBehind)
.detail("SnapshotBeginVersion", snapshotBeginVersion)
.detail("SnapshotTargetEndVersion", snapshotTargetEndVersion)
.detail("NextDispatchVersion", nextDispatchVersion)
.detail("CurrentVersion", recentReadVersion)
.detail("TimeElapsed", timeElapsed)
.detail("SnapshotIntervalSeconds", snapshotIntervalSeconds);
// Dispatch random shards to catch up to the expected progress
while(countShardsToDispatch > 0) {
// First select ranges to add
state std::vector<KeyRange> rangesToAdd;
// Limit number of tasks added per transaction
int taskBatchSize = BUGGIFY ? deterministicRandom()->randomInt(1, countShardsToDispatch + 1) : CLIENT_KNOBS->BACKUP_DISPATCH_ADDTASK_SIZE;
int added = 0;
while(countShardsToDispatch > 0 && added < taskBatchSize && shardMap.size() > 0) {
// Get a random range.
auto it = shardMap.randomRange();
// Find a NOT_DONE range and add it to rangesToAdd
while(1) {
if(it->value() >= NOT_DONE_MIN) {
rangesToAdd.push_back(it->range());
it->value() = DONE;
shardMap.coalesce(Key(it->begin()));
++added;
++countShardsDone;
--countShardsToDispatch;
--countShardsNotDone;
break;
}
if(it->end() == shardMap.mapEnd)
break;
++it;
}
}
state int64_t oldBatchSize = snapshotBatchSize.get();
state int64_t newBatchSize = oldBatchSize + rangesToAdd.size();
// Now add the selected ranges in a single transaction.
tr->reset();
loop {
try {
TraceEvent("FileBackupSnapshotDispatchAddingTasks")
.suppressFor(2)
.detail("TasksToAdd", rangesToAdd.size())
.detail("NewBatchSize", newBatchSize);
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
// For each range, make sure it isn't set in the dispatched range map.
state std::vector<Future<Optional<bool>>> beginReads;
state std::vector<Future<Optional<bool>>> endReads;
for(auto &range : rangesToAdd) {
beginReads.push_back(config.snapshotRangeDispatchMap().get(tr, range.begin));
endReads.push_back( config.snapshotRangeDispatchMap().get(tr, range.end));
}
wait(store(snapshotBatchSize.get(), config.snapshotBatchSize().getOrThrow(tr))
&& waitForAll(beginReads) && waitForAll(endReads) && taskBucket->keepRunning(tr, task));
// Snapshot batch size should be either oldBatchSize or newBatchSize. If new, this transaction is already done.
if(snapshotBatchSize.get() == newBatchSize) {
break;
}
else {
ASSERT(snapshotBatchSize.get() == oldBatchSize);
config.snapshotBatchSize().set(tr, newBatchSize);
snapshotBatchSize = newBatchSize;
config.snapshotDispatchLastShardsBehind().set(tr, Params.shardsBehind().get(task));
config.snapshotDispatchLastVersion().set(tr, tr->getReadVersion().get());
}
state std::vector<Future<Void>> addTaskFutures;
for(i = 0; i < beginReads.size(); ++i) {
KeyRange &range = rangesToAdd[i];
// This loop might have made changes to begin or end boundaries in a prior
// iteration. If so, the updated values exist in the RYW cache so re-read both entries.
Optional<bool> beginValue = config.snapshotRangeDispatchMap().get(tr, range.begin).get();
Optional<bool> endValue = config.snapshotRangeDispatchMap().get(tr, range.end).get();
ASSERT(!beginValue.present() || !endValue.present() || beginValue != endValue);
// If begin is present, it must be a range end so value must be false
// If end is present, it must be a range begin so value must be true
if( (!beginValue.present() || !beginValue.get())
&& (!endValue.present() || endValue.get()) )
{
if(beginValue.present()) {
config.snapshotRangeDispatchMap().erase(tr, range.begin);
}
else {
config.snapshotRangeDispatchMap().set(tr, range.begin, true);
}
if(endValue.present()) {
config.snapshotRangeDispatchMap().erase(tr, range.end);
}
else {
config.snapshotRangeDispatchMap().set(tr, range.end, false);
}
Version scheduledVersion = invalidVersion;
// If the next dispatch version is in the future, choose a random version at which to start the new task.
if(nextDispatchVersion > recentReadVersion)
scheduledVersion = recentReadVersion + deterministicRandom()->random01() * (nextDispatchVersion - recentReadVersion);
// Range tasks during the initial snapshot should run at a higher priority
int priority = latestSnapshotEndVersion.present() ? 0 : 1;
addTaskFutures.push_back(success(BackupRangeTaskFunc::addTask(tr, taskBucket, task, priority, range.begin, range.end, TaskCompletionKey::joinWith(snapshotBatchFuture), Reference<TaskFuture>(), scheduledVersion)));
TraceEvent("FileBackupSnapshotRangeDispatched")
.suppressFor(2)
.detail("BackupUID", config.getUid())
.detail("CurrentVersion", recentReadVersion)
.detail("ScheduledVersion", scheduledVersion)
.detail("BeginKey", range.begin.printable())
.detail("EndKey", range.end.printable());
}
else {
// This shouldn't happen because if the transaction was already done or if another execution
// of this task is making progress it should have been detected above.
ASSERT(false);
}
}
wait(waitForAll(addTaskFutures));
wait(tr->commit());
break;
} catch(Error &e) {
wait(tr->onError(e));
}
}
}
if(countShardsNotDone == 0) {
TraceEvent("FileBackupSnapshotDispatchFinished")
.detail("BackupUID", config.getUid())
.detail("AllShards", countAllShards)
.detail("ShardsDone", countShardsDone)
.detail("ShardsNotDone", countShardsNotDone)
.detail("SnapshotBeginVersion", snapshotBeginVersion)
.detail("SnapshotTargetEndVersion", snapshotTargetEndVersion)
.detail("CurrentVersion", recentReadVersion)
.detail("SnapshotIntervalSeconds", snapshotIntervalSeconds)
.detail("DispatchTimeSeconds", timer() - startTime);
Params.snapshotFinished().set(task, true);
}
return Void();
}
// This function is just a wrapper for BackupSnapshotManifest::addTask() which is defined below.
// The BackupSnapshotDispatchTask and BackupSnapshotManifest tasks reference each other so in order to keep their execute and finish phases
// defined together inside their class definitions this wrapper is declared here but defined after BackupSnapshotManifest is defined.
static Future<Key> addSnapshotManifestTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>());
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state BackupConfig config(task);
// Get the batch future and dispatch done keys, then clear them.
state Key snapshotBatchFutureKey;
state Key snapshotBatchDispatchDoneKey;
wait( store(snapshotBatchFutureKey, config.snapshotBatchFuture().getOrThrow(tr))
&& store(snapshotBatchDispatchDoneKey, config.snapshotBatchDispatchDoneKey().getOrThrow(tr)));
state Reference<TaskFuture> snapshotBatchFuture = futureBucket->unpack(snapshotBatchFutureKey);
state Reference<TaskFuture> snapshotBatchDispatchDoneFuture = futureBucket->unpack(snapshotBatchDispatchDoneKey);
config.snapshotBatchFuture().clear(tr);
config.snapshotBatchDispatchDoneKey().clear(tr);
config.snapshotBatchSize().clear(tr);
// Update shardsBehind here again in case the execute phase did not actually have to create any shard tasks
config.snapshotDispatchLastShardsBehind().set(tr, Params.shardsBehind().getOrDefault(task, 0));
config.snapshotDispatchLastVersion().set(tr, tr->getReadVersion().get());
state Reference<TaskFuture> snapshotFinishedFuture = task->getDoneFuture(futureBucket);
// If the snapshot is finished, the next task is to write a snapshot manifest, otherwise it's another snapshot dispatch task.
// In either case, the task should wait for snapshotBatchFuture.
// The snapshot done key, passed to the current task, is also passed on.
if(Params.snapshotFinished().getOrDefault(task, false)) {
wait(success(addSnapshotManifestTask(tr, taskBucket, task, TaskCompletionKey::signal(snapshotFinishedFuture), snapshotBatchFuture)));
}
else {
wait(success(addTask(tr, taskBucket, task, 1, TaskCompletionKey::signal(snapshotFinishedFuture), snapshotBatchFuture, Params.nextDispatchVersion().get(task))));
}
// This snapshot batch is finished, so set the batch done future.
wait(snapshotBatchDispatchDoneFuture->set(tr, taskBucket));
wait(taskBucket->finish(tr, task));
return Void();
}
};
StringRef BackupSnapshotDispatchTask::name = LiteralStringRef("file_backup_dispatch_ranges_5.2");
const uint32_t BackupSnapshotDispatchTask::version = 1;
REGISTER_TASKFUNC(BackupSnapshotDispatchTask);
struct BackupLogRangeTaskFunc : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
static TaskParam<bool> addBackupLogRangeTasks() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<int64_t> fileSize() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<Version> beginVersion() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<Version> endVersion() {
return LiteralStringRef(__FUNCTION__);
}
} Params;
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Reference<FlowLock> lock(new FlowLock(CLIENT_KNOBS->BACKUP_LOCK_BYTES));
wait(checkTaskVersion(cx, task, BackupLogRangeTaskFunc::name, BackupLogRangeTaskFunc::version));
state Version beginVersion = Params.beginVersion().get(task);
state Version endVersion = Params.endVersion().get(task);
state BackupConfig config(task);
state Reference<IBackupContainer> bc;
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
loop{
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
// Wait for the read version to pass endVersion
try {
wait(taskBucket->keepRunning(tr, task));
if(!bc) {
// Backup container must be present if we're still here
Reference<IBackupContainer> _bc = wait(config.backupContainer().getOrThrow(tr));
bc = _bc;
}
Version currentVersion = tr->getReadVersion().get();
if(endVersion < currentVersion)
break;
wait(delay(std::max(CLIENT_KNOBS->BACKUP_RANGE_MINWAIT, (double) (endVersion-currentVersion)/CLIENT_KNOBS->CORE_VERSIONSPERSECOND)));
tr->reset();
}
catch (Error &e) {
wait(tr->onError(e));
}
}
Key destUidValue = wait(config.destUidValue().getOrThrow(tr));
// Get the set of key ranges that hold mutations for (beginVersion, endVersion). They will be queried in parallel below
// and there is a limit on how many we want to process in a single BackupLogRangeTask so if that limit is exceeded then
// set the addBackupLogRangeTasks boolean in Params and stop, signalling the finish() step to break up the
// (beginVersion, endVersion) range into smaller intervals which are then processed by individual BackupLogRangeTasks.
state Standalone<VectorRef<KeyRangeRef>> ranges = getLogRanges(beginVersion, endVersion, destUidValue);
if (ranges.size() > CLIENT_KNOBS->BACKUP_MAX_LOG_RANGES) {
Params.addBackupLogRangeTasks().set(task, true);
return Void();
}
// Block size must be at least large enough for 1 max size key, 1 max size value, and overhead, so conservatively 125k.
state int blockSize = BUGGIFY ? deterministicRandom()->randomInt(125e3, 4e6) : CLIENT_KNOBS->BACKUP_LOGFILE_BLOCK_SIZE;
state Reference<IBackupFile> outFile = wait(bc->writeLogFile(beginVersion, endVersion, blockSize));
state LogFileWriter logFile(outFile, blockSize);
// Query all key ranges covering (beginVersion, endVersion) in parallel, writing their results to the results promise stream
// as they are received. Note that this means the records read from the results stream are not likely to be in increasing
// Version order.
state PromiseStream<RangeResultWithVersion> results;
state std::vector<Future<Void>> rc;
for (auto &range : ranges) {
rc.push_back(readCommitted(cx, results, lock, range, false, true, true));
}
state Future<Void> sendEOS = map(errorOr(waitForAll(rc)), [=](ErrorOr<Void> const &result) {
if(result.isError())
results.sendError(result.getError());
else
results.sendError(end_of_stream());
return Void();
});
state Version lastVersion;
try {
loop {
state RangeResultWithVersion r = waitNext(results.getFuture());
lock->release(r.first.expectedSize());
state int i = 0;
for (; i < r.first.size(); ++i) {
// Remove the backupLogPrefix + UID bytes from the key
wait(logFile.writeKV(r.first[i].key.substr(backupLogPrefixBytes + 16), r.first[i].value));
lastVersion = r.second;
}
}
} catch (Error &e) {
if(e.code() == error_code_actor_cancelled)
throw;
if (e.code() != error_code_end_of_stream) {
state Error err = e;
wait(config.logError(cx, err, format("Failed to write to file `%s'", outFile->getFileName().c_str())));
throw err;
}
}
// Make sure this task is still alive, if it's not then the data read above could be incomplete.
wait(taskBucket->keepRunning(cx, task));
wait(outFile->finish());
TraceEvent("FileBackupWroteLogFile")
.suppressFor(60)
.detail("BackupUID", config.getUid())
.detail("Size", outFile->size())
.detail("BeginVersion", beginVersion)
.detail("EndVersion", endVersion)
.detail("LastReadVersion", latestVersion);
Params.fileSize().set(task, outFile->size());
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, int priority, Version beginVersion, Version endVersion, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key key = wait(addBackupTask(BackupLogRangeTaskFunc::name,
BackupLogRangeTaskFunc::version,
tr, taskBucket, completionKey,
BackupConfig(parentTask),
waitFor,
[=](Reference<Task> task) {
Params.beginVersion().set(task, beginVersion);
Params.endVersion().set(task, endVersion);
Params.addBackupLogRangeTasks().set(task, false);
},
priority));
return key;
}
ACTOR static Future<Void> startBackupLogRangeInternal(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task, Reference<TaskFuture> taskFuture, Version beginVersion, Version endVersion) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
std::vector<Future<Key>> addTaskVector;
int tasks = 0;
for (int64_t vblock = beginVersion / CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE; vblock < (endVersion + CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE - 1) / CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE; vblock += CLIENT_KNOBS->BACKUP_MAX_LOG_RANGES) {
Version bv = std::max(beginVersion, vblock * CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE);
if( tasks >= CLIENT_KNOBS->BACKUP_SHARD_TASK_LIMIT ) {
addTaskVector.push_back(addTask(tr, taskBucket, task, task->getPriority(), bv, endVersion, TaskCompletionKey::joinWith(taskFuture)));
break;
}
Version ev = std::min(endVersion, (vblock + CLIENT_KNOBS->BACKUP_MAX_LOG_RANGES) * CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE);
addTaskVector.push_back(addTask(tr, taskBucket, task, task->getPriority(), bv, ev, TaskCompletionKey::joinWith(taskFuture)));
tasks++;
}
wait(waitForAll(addTaskVector));
return Void();
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Version beginVersion = Params.beginVersion().get(task);
state Version endVersion = Params.endVersion().get(task);
state Reference<TaskFuture> taskFuture = futureBucket->unpack(task->params[Task::reservedTaskParamKeyDone]);
state BackupConfig config(task);
if(Params.fileSize().exists(task)) {
config.logBytesWritten().atomicOp(tr, Params.fileSize().get(task), MutationRef::AddValue);
}
if (Params.addBackupLogRangeTasks().get(task)) {
wait(startBackupLogRangeInternal(tr, taskBucket, futureBucket, task, taskFuture, beginVersion, endVersion));
} else {
wait(taskFuture->set(tr, taskBucket));
}
wait(taskBucket->finish(tr, task));
return Void();
}
};
StringRef BackupLogRangeTaskFunc::name = LiteralStringRef("file_backup_write_logs_5.2");
const uint32_t BackupLogRangeTaskFunc::version = 1;
REGISTER_TASKFUNC(BackupLogRangeTaskFunc);
//This task stopped being used in 6.2, however the code remains here to handle upgrades.
struct EraseLogRangeTaskFunc : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
StringRef getName() const { return name; };
static struct {
static TaskParam<Version> beginVersion() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<Version> endVersion() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<Key> destUidValue() {
return LiteralStringRef(__FUNCTION__);
}
} Params;
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, UID logUid, TaskCompletionKey completionKey, Key destUidValue, Version endVersion = 0, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key key = wait(addBackupTask(EraseLogRangeTaskFunc::name,
EraseLogRangeTaskFunc::version,
tr, taskBucket, completionKey,
BackupConfig(logUid),
waitFor,
[=](Reference<Task> task) {
Params.beginVersion().set(task, 1); //FIXME: remove in 6.X, only needed for 5.2 backward compatibility
Params.endVersion().set(task, endVersion);
Params.destUidValue().set(task, destUidValue);
},
0, false));
return key;
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Reference<TaskFuture> taskFuture = futureBucket->unpack(task->params[Task::reservedTaskParamKeyDone]);
wait(checkTaskVersion(tr->getDatabase(), task, EraseLogRangeTaskFunc::name, EraseLogRangeTaskFunc::version));
state Version endVersion = Params.endVersion().get(task);
state Key destUidValue = Params.destUidValue().get(task);
state BackupConfig config(task);
state Key logUidValue = config.getUidAsKey();
wait(taskFuture->set(tr, taskBucket) && taskBucket->finish(tr, task) && eraseLogData(tr, logUidValue, destUidValue, endVersion != 0 ? Optional<Version>(endVersion) : Optional<Version>()));
return Void();
}
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Void(); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef EraseLogRangeTaskFunc::name = LiteralStringRef("file_backup_erase_logs_5.2");
const uint32_t EraseLogRangeTaskFunc::version = 1;
REGISTER_TASKFUNC(EraseLogRangeTaskFunc);
struct BackupLogsDispatchTask : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
static TaskParam<Version> prevBeginVersion() {
return LiteralStringRef(__FUNCTION__);
}
static TaskParam<Version> beginVersion() {
return LiteralStringRef(__FUNCTION__);
}
} Params;
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
wait(checkTaskVersion(tr->getDatabase(), task, BackupLogsDispatchTask::name, BackupLogsDispatchTask::version));
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Reference<TaskFuture> onDone = task->getDoneFuture(futureBucket);
state Version prevBeginVersion = Params.prevBeginVersion().get(task);
state Version beginVersion = Params.beginVersion().get(task);
state BackupConfig config(task);
config.latestLogEndVersion().set(tr, beginVersion);
state bool stopWhenDone;
state Optional<Version> restorableVersion;
state EBackupState backupState;
state Optional<std::string> tag;
state Optional<Version> latestSnapshotEndVersion;
state Optional<bool> partitionedLog;
wait(store(stopWhenDone, config.stopWhenDone().getOrThrow(tr))
&& store(restorableVersion, config.getLatestRestorableVersion(tr))
&& store(backupState, config.stateEnum().getOrThrow(tr))
&& store(tag, config.tag().get(tr))
&& store(latestSnapshotEndVersion, config.latestSnapshotEndVersion().get(tr))
&& store(partitionedLog, config.partitionedLogEnabled().get(tr)));
// If restorable, update the last restorable version for this tag
if(restorableVersion.present() && tag.present()) {
FileBackupAgent().setLastRestorable(tr, StringRef(tag.get()), restorableVersion.get());
}
// If the backup is restorable but the state is not differential then set state to differential
if(restorableVersion.present() && backupState != BackupAgentBase::STATE_RUNNING_DIFFERENTIAL)
config.stateEnum().set(tr, BackupAgentBase::STATE_RUNNING_DIFFERENTIAL);
// If stopWhenDone is set and there is a restorable version, set the done future and do not create further tasks.
if(stopWhenDone && restorableVersion.present()) {
wait(onDone->set(tr, taskBucket) && taskBucket->finish(tr, task));
TraceEvent("FileBackupLogsDispatchDone")
.detail("BackupUID", config.getUid())
.detail("BeginVersion", beginVersion)
.detail("RestorableVersion", restorableVersion.orDefault(-1));
return Void();
}
state Version endVersion = std::max<Version>( tr->getReadVersion().get() + 1, beginVersion + (CLIENT_KNOBS->BACKUP_MAX_LOG_RANGES-1)*CLIENT_KNOBS->LOG_RANGE_BLOCK_SIZE );
TraceEvent("FileBackupLogDispatch")
.suppressFor(60)
.detail("BeginVersion", beginVersion)
.detail("EndVersion", endVersion)
.detail("RestorableVersion", restorableVersion.orDefault(-1));
state Reference<TaskFuture> logDispatchBatchFuture = futureBucket->future(tr);
// If a snapshot has ended for this backup then mutations are higher priority to reduce backup lag
state int priority = latestSnapshotEndVersion.present() ? 1 : 0;
if (!partitionedLog.present() || !partitionedLog.get()) {
// Add the initial log range task to read/copy the mutations and the next logs dispatch task which will run after this batch is done
wait(success(BackupLogRangeTaskFunc::addTask(tr, taskBucket, task, priority, beginVersion, endVersion, TaskCompletionKey::joinWith(logDispatchBatchFuture))));
wait(success(BackupLogsDispatchTask::addTask(tr, taskBucket, task, priority, beginVersion, endVersion, TaskCompletionKey::signal(onDone), logDispatchBatchFuture)));
// Do not erase at the first time
if (prevBeginVersion > 0) {
state Key destUidValue = wait(config.destUidValue().getOrThrow(tr));
wait( eraseLogData(tr, config.getUidAsKey(), destUidValue, Optional<Version>(beginVersion)) );
}
} else {
// Skip mutation copy and erase backup mutations. Just check back periodically.
Version scheduledVersion = tr->getReadVersion().get() + CLIENT_KNOBS->BACKUP_POLL_PROGRESS_SECONDS * CLIENT_KNOBS->VERSIONS_PER_SECOND;
wait(success(BackupLogsDispatchTask::addTask(tr, taskBucket, task, 1, beginVersion, endVersion, TaskCompletionKey::signal(onDone), Reference<TaskFuture>(), scheduledVersion)));
}
wait(taskBucket->finish(tr, task));
TraceEvent("FileBackupLogsDispatchContinuing")
.suppressFor(60)
.detail("BackupUID", config.getUid())
.detail("BeginVersion", beginVersion)
.detail("EndVersion", endVersion);
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, int priority, Version prevBeginVersion, Version beginVersion, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>(), Version scheduledVersion = invalidVersion) {
Key key = wait(addBackupTask(BackupLogsDispatchTask::name,
BackupLogsDispatchTask::version,
tr, taskBucket, completionKey,
BackupConfig(parentTask),
waitFor,
[=](Reference<Task> task) {
Params.prevBeginVersion().set(task, prevBeginVersion);
Params.beginVersion().set(task, beginVersion);
if (scheduledVersion != invalidVersion) {
ReservedTaskParams::scheduledVersion().set(task, scheduledVersion);
}
},
priority));
return key;
}
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Void(); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef BackupLogsDispatchTask::name = LiteralStringRef("file_backup_dispatch_logs_5.2");
const uint32_t BackupLogsDispatchTask::version = 1;
REGISTER_TASKFUNC(BackupLogsDispatchTask);
struct FileBackupFinishedTask : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
StringRef getName() const { return name; };
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
wait(checkTaskVersion(tr->getDatabase(), task, FileBackupFinishedTask::name, FileBackupFinishedTask::version));
state BackupConfig backup(task);
state UID uid = backup.getUid();
tr->setOption(FDBTransactionOptions::COMMIT_ON_FIRST_PROXY);
state Key destUidValue = wait(backup.destUidValue().getOrThrow(tr));
wait(eraseLogData(tr, backup.getUidAsKey(), destUidValue) && clearBackupStartID(tr, uid));
backup.stateEnum().set(tr, EBackupState::STATE_COMPLETED);
wait(taskBucket->finish(tr, task));
TraceEvent("FileBackupFinished").detail("BackupUID", uid);
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key key = wait(addBackupTask(FileBackupFinishedTask::name,
FileBackupFinishedTask::version,
tr, taskBucket, completionKey,
BackupConfig(parentTask), waitFor));
return key;
}
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Void(); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef FileBackupFinishedTask::name = LiteralStringRef("file_backup_finished_5.2");
const uint32_t FileBackupFinishedTask::version = 1;
REGISTER_TASKFUNC(FileBackupFinishedTask);
struct BackupSnapshotManifest : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
static TaskParam<Version> endVersion() { return LiteralStringRef(__FUNCTION__); }
} Params;
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state BackupConfig config(task);
state Reference<IBackupContainer> bc;
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
// Read the entire range file map into memory, then walk it backwards from its last entry to produce a list of non overlapping key range files
state std::map<Key, BackupConfig::RangeSlice> localmap;
state Key startKey;
state int batchSize = BUGGIFY ? 1 : 1000000;
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait(taskBucket->keepRunning(tr, task));
if(!bc) {
// Backup container must be present if we're still here
wait(store(bc, config.backupContainer().getOrThrow(tr)));
}
BackupConfig::RangeFileMapT::PairsType rangeresults = wait(config.snapshotRangeFileMap().getRange(tr, startKey, {}, batchSize));
for(auto &p : rangeresults) {
localmap.insert(p);
}
if(rangeresults.size() < batchSize)
break;
startKey = keyAfter(rangeresults.back().first);
tr->reset();
} catch(Error &e) {
wait(tr->onError(e));
}
}
std::vector<std::string> files;
std::vector<std::pair<Key, Key>> beginEndKeys;
state Version maxVer = 0;
state Version minVer = std::numeric_limits<Version>::max();
state int64_t totalBytes = 0;
if(!localmap.empty()) {
// Get iterator that points to greatest key, start there.
auto ri = localmap.rbegin();
auto i = (++ri).base();
while(1) {
const BackupConfig::RangeSlice &r = i->second;
// Add file to final file list
files.push_back(r.fileName);
// Add (beginKey, endKey) pairs to the list
beginEndKeys.emplace_back(i->second.begin, i->first);
// Update version range seen
if(r.version < minVer)
minVer = r.version;
if(r.version > maxVer)
maxVer = r.version;
// Update total bytes counted.
totalBytes += r.fileSize;
// Jump to file that either ends where this file begins or has the greatest end that is less than
// the begin of this file. In other words find the map key that is <= begin of this file. To do this
// find the first end strictly greater than begin and then back up one.
i = localmap.upper_bound(i->second.begin);
// If we get begin then we're done, there are no more ranges that end at or before the last file's begin
if(i == localmap.begin())
break;
--i;
}
}
Params.endVersion().set(task, maxVer);
wait(bc->writeKeyspaceSnapshotFile(files, beginEndKeys, totalBytes));
TraceEvent(SevInfo, "FileBackupWroteSnapshotManifest")
.detail("BackupUID", config.getUid())
.detail("BeginVersion", minVer)
.detail("EndVersion", maxVer)
.detail("TotalBytes", totalBytes);
return Void();
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
wait(checkTaskVersion(tr->getDatabase(), task, BackupSnapshotManifest::name, BackupSnapshotManifest::version));
state BackupConfig config(task);
// Set the latest snapshot end version, which was set during the execute phase
config.latestSnapshotEndVersion().set(tr, Params.endVersion().get(task));
state bool stopWhenDone;
state EBackupState backupState;
state Optional<Version> restorableVersion;
state Optional<Version> firstSnapshotEndVersion;
state Optional<std::string> tag;
wait(store(stopWhenDone, config.stopWhenDone().getOrThrow(tr))
&& store(backupState, config.stateEnum().getOrThrow(tr))
&& store(restorableVersion, config.getLatestRestorableVersion(tr))
&& store(firstSnapshotEndVersion, config.firstSnapshotEndVersion().get(tr))
&& store(tag, config.tag().get(tr)));
// If restorable, update the last restorable version for this tag
if(restorableVersion.present() && tag.present()) {
FileBackupAgent().setLastRestorable(tr, StringRef(tag.get()), restorableVersion.get());
}
if(!firstSnapshotEndVersion.present()) {
config.firstSnapshotEndVersion().set(tr, Params.endVersion().get(task));
}
// If the backup is restorable and the state isn't differential the set state to differential
if(restorableVersion.present() && backupState != BackupAgentBase::STATE_RUNNING_DIFFERENTIAL)
config.stateEnum().set(tr, BackupAgentBase::STATE_RUNNING_DIFFERENTIAL);
// Unless we are to stop, start the next snapshot using the default interval
Reference<TaskFuture> snapshotDoneFuture = task->getDoneFuture(futureBucket);
if(!stopWhenDone) {
wait(config.initNewSnapshot(tr) && success(BackupSnapshotDispatchTask::addTask(tr, taskBucket, task, 1, TaskCompletionKey::signal(snapshotDoneFuture))));
} else {
// Set the done future as the snapshot is now complete.
wait(snapshotDoneFuture->set(tr, taskBucket));
}
wait(taskBucket->finish(tr, task));
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key key = wait(addBackupTask(BackupSnapshotManifest::name,
BackupSnapshotManifest::version,
tr, taskBucket, completionKey,
BackupConfig(parentTask), waitFor, NOP_SETUP_TASK_FN, 1));
return key;
}
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef BackupSnapshotManifest::name = LiteralStringRef("file_backup_write_snapshot_manifest_5.2");
const uint32_t BackupSnapshotManifest::version = 1;
REGISTER_TASKFUNC(BackupSnapshotManifest);
Future<Key> BackupSnapshotDispatchTask::addSnapshotManifestTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor) {
return BackupSnapshotManifest::addTask(tr, taskBucket, parentTask, completionKey, waitFor);
}
struct StartFullBackupTaskFunc : BackupTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
static TaskParam<Version> beginVersion() { return LiteralStringRef(__FUNCTION__); }
} Params;
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
wait(checkTaskVersion(cx, task, StartFullBackupTaskFunc::name, StartFullBackupTaskFunc::version));
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
loop{
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
Version startVersion = wait(tr->getReadVersion());
Params.beginVersion().set(task, startVersion);
break;
}
catch (Error &e) {
wait(tr->onError(e));
}
}
// Check if backup worker is enabled
DatabaseConfiguration dbConfig = wait(getDatabaseConfiguration(cx));
state bool backupWorkerEnabled = dbConfig.backupWorkerEnabled;
if (!backupWorkerEnabled) {
wait(success(changeConfig(cx, "backup_worker_enabled:=1", true)));
backupWorkerEnabled = true;
}
// Set the "backupStartedKey" and wait for all backup worker started
tr->reset();
state BackupConfig config(task);
loop {
state Future<Void> watchFuture;
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Future<Void> keepRunning = taskBucket->keepRunning(tr, task);
state Future<Optional<Value>> started = tr->get(backupStartedKey);
state Future<Optional<Value>> taskStarted = tr->get(config.allWorkerStarted().key);
state Future<Optional<bool>> partitionedLog = config.partitionedLogEnabled().get(tr);
wait(success(started) && success(taskStarted) && success(partitionedLog));
if (!partitionedLog.get().present() || !partitionedLog.get().get()) {
return Void(); // Skip if not using partitioned logs
}
std::vector<std::pair<UID, Version>> ids;
if (started.get().present()) {
ids = decodeBackupStartedValue(started.get().get());
}
const UID uid = config.getUid();
auto it = std::find_if(ids.begin(), ids.end(),
[uid](const std::pair<UID, Version>& p) { return p.first == uid; });
if (it == ids.end()) {
ids.emplace_back(uid, Params.beginVersion().get(task));
} else {
Params.beginVersion().set(task, it->second);
}
tr->set(backupStartedKey, encodeBackupStartedValue(ids));
if (backupWorkerEnabled) {
config.backupWorkerEnabled().set(tr, true);
}
// The task may be restarted. Set the watch if started key has NOT been set.
if (!taskStarted.get().present()) {
watchFuture = tr->watch(config.allWorkerStarted().key);
}
wait(keepRunning);
wait(tr->commit());
if (!taskStarted.get().present()) {
wait(watchFuture);
}
return Void();
} catch (Error &e) {
wait(tr->onError(e));
}
}
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state BackupConfig config(task);
state Version beginVersion = Params.beginVersion().get(task);
state Future<std::vector<KeyRange>> backupRangesFuture = config.backupRanges().getOrThrow(tr);
state Future<Key> destUidValueFuture = config.destUidValue().getOrThrow(tr);
state Future<Optional<bool>> partitionedLog = config.partitionedLogEnabled().get(tr);
wait(success(backupRangesFuture) && success(destUidValueFuture) && success(partitionedLog));
std::vector<KeyRange> backupRanges = backupRangesFuture.get();
Key destUidValue = destUidValueFuture.get();
// Start logging the mutations for the specified ranges of the tag if needed
if (!partitionedLog.get().present() || !partitionedLog.get().get()) {
for (auto& backupRange : backupRanges) {
config.startMutationLogs(tr, backupRange, destUidValue);
}
}
config.stateEnum().set(tr, EBackupState::STATE_RUNNING);
state Reference<TaskFuture> backupFinished = futureBucket->future(tr);
// Initialize the initial snapshot and create tasks to continually write logs and snapshots
// The initial snapshot has a desired duration of 0, meaning go as fast as possible.
wait(config.initNewSnapshot(tr, 0));
// Using priority 1 for both of these to at least start both tasks soon
wait(success(BackupSnapshotDispatchTask::addTask(tr, taskBucket, task, 1, TaskCompletionKey::joinWith(backupFinished))));
wait(success(BackupLogsDispatchTask::addTask(tr, taskBucket, task, 1, 0, beginVersion, TaskCompletionKey::joinWith(backupFinished))));
// If a clean stop is requested, the log and snapshot tasks will quit after the backup is restorable, then the following
// task will clean up and set the completed state.
wait(success(FileBackupFinishedTask::addTask(tr, taskBucket, task, TaskCompletionKey::noSignal(), backupFinished)));
wait(taskBucket->finish(tr, task));
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, UID uid, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>())
{
Key key = wait(addBackupTask(StartFullBackupTaskFunc::name,
StartFullBackupTaskFunc::version,
tr, taskBucket, completionKey,
BackupConfig(uid), waitFor));
return key;
}
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef StartFullBackupTaskFunc::name = LiteralStringRef("file_backup_start_5.2");
const uint32_t StartFullBackupTaskFunc::version = 1;
REGISTER_TASKFUNC(StartFullBackupTaskFunc);
struct RestoreCompleteTaskFunc : RestoreTaskFuncBase {
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
wait(checkTaskVersion(tr->getDatabase(), task, name, version));
state RestoreConfig restore(task);
restore.stateEnum().set(tr, ERestoreState::COMPLETED);
tr->atomicOp(metadataVersionKey, metadataVersionRequiredValue, MutationRef::SetVersionstampedValue);
// Clear the file map now since it could be huge.
restore.fileSet().clear(tr);
// TODO: Validate that the range version map has exactly the restored ranges in it. This means that for any restore operation
// the ranges to restore must be within the backed up ranges, otherwise from the restore perspective it will appear that some
// key ranges were missing and so the backup set is incomplete and the restore has failed.
// This validation cannot be done currently because Restore only supports a single restore range but backups can have many ranges.
// Clear the applyMutations stuff, including any unapplied mutations from versions beyond the restored version.
restore.clearApplyMutationsKeys(tr);
wait(taskBucket->finish(tr, task));
wait(unlockDatabase(tr, restore.getUid()));
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key doneKey = wait(completionKey.get(tr, taskBucket));
state Reference<Task> task(new Task(RestoreCompleteTaskFunc::name, RestoreCompleteTaskFunc::version, doneKey));
// Get restore config from parent task and bind it to new task
wait(RestoreConfig(parentTask).toTask(tr, task));
if (!waitFor) {
return taskBucket->addTask(tr, task);
}
wait(waitFor->onSetAddTask(tr, taskBucket, task));
return LiteralStringRef("OnSetAddTask");
}
static StringRef name;
static const uint32_t version;
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Void(); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef RestoreCompleteTaskFunc::name = LiteralStringRef("restore_complete");
const uint32_t RestoreCompleteTaskFunc::version = 1;
REGISTER_TASKFUNC(RestoreCompleteTaskFunc);
struct RestoreFileTaskFuncBase : RestoreTaskFuncBase {
struct InputParams {
static TaskParam<RestoreFile> inputFile() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<int64_t> readOffset() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<int64_t> readLen() { return LiteralStringRef(__FUNCTION__); }
} Params;
std::string toString(Reference<Task> task) {
return format("fileName '%s' readLen %lld readOffset %lld",
Params.inputFile().get(task).fileName.c_str(),
Params.readLen().get(task),
Params.readOffset().get(task));
}
};
struct RestoreRangeTaskFunc : RestoreFileTaskFuncBase {
static struct : InputParams {
// The range of data that the (possibly empty) data represented, which is set if it intersects the target restore range
static TaskParam<KeyRange> originalFileRange() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<std::vector<KeyRange>> originalFileRanges() { return LiteralStringRef(__FUNCTION__); }
static std::vector<KeyRange> getOriginalFileRanges(Reference<Task> task) {
if (originalFileRanges().exists(task)) {
return Params.originalFileRanges().get(task);
}
else {
std::vector<KeyRange> range;
if (originalFileRange().exists(task))
range.push_back(Params.originalFileRange().get(task));
return range;
}
}
} Params;
std::string toString(Reference<Task> task) {
std::string returnStr = RestoreFileTaskFuncBase::toString(task);
for(auto &range : Params.getOriginalFileRanges(task))
returnStr += format(" originalFileRange '%s'", printable(range).c_str());
return returnStr;
}
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state RestoreConfig restore(task);
state RestoreFile rangeFile = Params.inputFile().get(task);
state int64_t readOffset = Params.readOffset().get(task);
state int64_t readLen = Params.readLen().get(task);
TraceEvent("FileRestoreRangeStart")
.suppressFor(60)
.detail("RestoreUID", restore.getUid())
.detail("FileName", rangeFile.fileName)
.detail("FileVersion", rangeFile.version)
.detail("FileSize", rangeFile.fileSize)
.detail("ReadOffset", readOffset)
.detail("ReadLen", readLen)
.detail("TaskInstance", THIS_ADDR);
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
state Future<Reference<IBackupContainer>> bc;
state Future<std::vector<KeyRange>> restoreRanges;
state Future<Key> addPrefix;
state Future<Key> removePrefix;
loop{
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
bc = restore.sourceContainer().getOrThrow(tr);
restoreRanges = restore.getRestoreRangesOrDefault(tr);
addPrefix = restore.addPrefix().getD(tr);
removePrefix = restore.removePrefix().getD(tr);
wait(taskBucket->keepRunning(tr, task));
wait(success(bc) && success(restoreRanges) && success(addPrefix) && success(removePrefix) && checkTaskVersion(tr->getDatabase(), task, name, version));
break;
}
catch (Error &e) {
wait(tr->onError(e));
}
}
state Reference<IAsyncFile> inFile = wait(bc.get()->readFile(rangeFile.fileName));
state Standalone<VectorRef<KeyValueRef>> blockData = wait(decodeRangeFileBlock(inFile, readOffset, readLen));
// First and last key are the range for this file
state KeyRange fileRange = KeyRangeRef(blockData.front().key, blockData.back().key);
state std::vector<KeyRange> originalFileRanges;
// If fileRange doesn't intersect restore range then we're done.
state int index;
for (index = 0; index < restoreRanges.get().size(); index++) {
auto &restoreRange = restoreRanges.get()[index];
if (!fileRange.intersects(restoreRange))
continue;
// We know the file range intersects the restore range but there could still be keys outside the restore range.
// Find the subvector of kv pairs that intersect the restore range. Note that the first and last keys are just the range endpoints for this file
int rangeStart = 1;
int rangeEnd = blockData.size() - 1;
// Slide start forward, stop if something in range is found
while (rangeStart < rangeEnd && !restoreRange.contains(blockData[rangeStart].key))
++rangeStart;
// Side end backward, stop if something in range is found
while (rangeEnd > rangeStart && !restoreRange.contains(blockData[rangeEnd - 1].key))
--rangeEnd;
state VectorRef<KeyValueRef> data = blockData.slice(rangeStart, rangeEnd);
// Shrink file range to be entirely within restoreRange and translate it to the new prefix
// First, use the untranslated file range to create the shrunk original file range which must be used in the kv range version map for applying mutations
state KeyRange originalFileRange = KeyRangeRef(std::max(fileRange.begin, restoreRange.begin), std::min(fileRange.end, restoreRange.end));
originalFileRanges.push_back(originalFileRange);
// Now shrink and translate fileRange
Key fileEnd = std::min(fileRange.end, restoreRange.end);
if (fileEnd == (removePrefix.get() == StringRef() ? normalKeys.end : strinc(removePrefix.get()))) {
fileEnd = addPrefix.get() == StringRef() ? normalKeys.end : strinc(addPrefix.get());
}
else {
fileEnd = fileEnd.removePrefix(removePrefix.get()).withPrefix(addPrefix.get());
}
fileRange = KeyRangeRef(std::max(fileRange.begin, restoreRange.begin).removePrefix(removePrefix.get()).withPrefix(addPrefix.get()), fileEnd);
state int start = 0;
state int end = data.size();
state int dataSizeLimit = BUGGIFY ? deterministicRandom()->randomInt(256 * 1024, 10e6) : CLIENT_KNOBS->RESTORE_WRITE_TX_SIZE;
tr->reset();
loop{
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state int i = start;
state int txBytes = 0;
state int iend = start;
// find iend that results in the desired transaction size
for (; iend < end && txBytes < dataSizeLimit; ++iend) {
txBytes += data[iend].key.expectedSize();
txBytes += data[iend].value.expectedSize();
}
// Clear the range we are about to set.
// If start == 0 then use fileBegin for the start of the range, else data[start]
// If iend == end then use fileEnd for the end of the range, else data[iend]
state KeyRange trRange = KeyRangeRef((start == 0) ? fileRange.begin : data[start].key.removePrefix(removePrefix.get()).withPrefix(addPrefix.get())
, (iend == end) ? fileRange.end : data[iend].key.removePrefix(removePrefix.get()).withPrefix(addPrefix.get()));
tr->clear(trRange);
for (; i < iend; ++i) {
tr->setOption(FDBTransactionOptions::NEXT_WRITE_NO_WRITE_CONFLICT_RANGE);
tr->set(data[i].key.removePrefix(removePrefix.get()).withPrefix(addPrefix.get()), data[i].value);
}
// Add to bytes written count
restore.bytesWritten().atomicOp(tr, txBytes, MutationRef::Type::AddValue);
state Future<Void> checkLock = checkDatabaseLock(tr, restore.getUid());
wait(taskBucket->keepRunning(tr, task));
wait(checkLock);
wait(tr->commit());
TraceEvent("FileRestoreCommittedRange")
.suppressFor(60)
.detail("RestoreUID", restore.getUid())
.detail("FileName", rangeFile.fileName)
.detail("FileVersion", rangeFile.version)
.detail("FileSize", rangeFile.fileSize)
.detail("ReadOffset", readOffset)
.detail("ReadLen", readLen)
.detail("CommitVersion", tr->getCommittedVersion())
.detail("BeginRange", trRange.begin)
.detail("EndRange", trRange.end)
.detail("StartIndex", start)
.detail("EndIndex", i)
.detail("DataSize", data.size())
.detail("Bytes", txBytes)
.detail("OriginalFileRange", originalFileRange)
.detail("TaskInstance", THIS_ADDR);
// Commit succeeded, so advance starting point
start = i;
if (start == end)
break;
tr->reset();
}
catch (Error &e) {
if (e.code() == error_code_transaction_too_large)
dataSizeLimit /= 2;
else
wait(tr->onError(e));
}
}
}
if (!originalFileRanges.empty()) {
if (BUGGIFY && restoreRanges.get().size() == 1) {
Params.originalFileRange().set(task, originalFileRanges[0]);
}
else {
Params.originalFileRanges().set(task, originalFileRanges);
}
}
return Void();
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state RestoreConfig restore(task);
restore.fileBlocksFinished().atomicOp(tr, 1, MutationRef::Type::AddValue);
// Update the KV range map if originalFileRange is set
std::vector<Future<Void>> updateMap;
std::vector<KeyRange> ranges = Params.getOriginalFileRanges(task);
for (auto &range : ranges) {
Value versionEncoded = BinaryWriter::toValue(Params.inputFile().get(task).version, Unversioned());
updateMap.push_back(krmSetRange(tr, restore.applyMutationsMapPrefix(), range, versionEncoded));
}
state Reference<TaskFuture> taskFuture = futureBucket->unpack(task->params[Task::reservedTaskParamKeyDone]);
wait(taskFuture->set(tr, taskBucket) &&
taskBucket->finish(tr, task) && waitForAll(updateMap));
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, RestoreFile rf, int64_t offset, int64_t len, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key doneKey = wait(completionKey.get(tr, taskBucket));
state Reference<Task> task(new Task(RestoreRangeTaskFunc::name, RestoreRangeTaskFunc::version, doneKey));
// Create a restore config from the current task and bind it to the new task.
wait(RestoreConfig(parentTask).toTask(tr, task));
Params.inputFile().set(task, rf);
Params.readOffset().set(task, offset);
Params.readLen().set(task, len);
if (!waitFor) {
return taskBucket->addTask(tr, task);
}
wait(waitFor->onSetAddTask(tr, taskBucket, task));
return LiteralStringRef("OnSetAddTask");
}
static StringRef name;
static const uint32_t version;
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef RestoreRangeTaskFunc::name = LiteralStringRef("restore_range_data");
const uint32_t RestoreRangeTaskFunc::version = 1;
REGISTER_TASKFUNC(RestoreRangeTaskFunc);
struct RestoreLogDataTaskFunc : RestoreFileTaskFuncBase {
static StringRef name;
static const uint32_t version;
StringRef getName() const { return name; };
static struct : InputParams {
} Params;
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state RestoreConfig restore(task);
state RestoreFile logFile = Params.inputFile().get(task);
state int64_t readOffset = Params.readOffset().get(task);
state int64_t readLen = Params.readLen().get(task);
TraceEvent("FileRestoreLogStart")
.suppressFor(60)
.detail("RestoreUID", restore.getUid())
.detail("FileName", logFile.fileName)
.detail("FileBeginVersion", logFile.version)
.detail("FileEndVersion", logFile.endVersion)
.detail("FileSize", logFile.fileSize)
.detail("ReadOffset", readOffset)
.detail("ReadLen", readLen)
.detail("TaskInstance", THIS_ADDR);
state Reference<ReadYourWritesTransaction> tr( new ReadYourWritesTransaction(cx) );
state Reference<IBackupContainer> bc;
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
Reference<IBackupContainer> _bc = wait(restore.sourceContainer().getOrThrow(tr));
bc = _bc;
wait(checkTaskVersion(tr->getDatabase(), task, name, version));
wait(taskBucket->keepRunning(tr, task));
break;
} catch(Error &e) {
wait(tr->onError(e));
}
}
state Key mutationLogPrefix = restore.mutationLogPrefix();
state Reference<IAsyncFile> inFile = wait(bc->readFile(logFile.fileName));
state Standalone<VectorRef<KeyValueRef>> data = wait(decodeLogFileBlock(inFile, readOffset, readLen));
state int start = 0;
state int end = data.size();
state int dataSizeLimit = BUGGIFY ? deterministicRandom()->randomInt(256 * 1024, 10e6) : CLIENT_KNOBS->RESTORE_WRITE_TX_SIZE;
tr->reset();
loop {
try {
if(start == end)
return Void();
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state int i = start;
state int txBytes = 0;
for(; i < end && txBytes < dataSizeLimit; ++i) {
Key k = data[i].key.withPrefix(mutationLogPrefix);
ValueRef v = data[i].value;
tr->set(k, v);
txBytes += k.expectedSize();
txBytes += v.expectedSize();
}
state Future<Void> checkLock = checkDatabaseLock(tr, restore.getUid());
wait(taskBucket->keepRunning(tr, task));
wait( checkLock );
// Add to bytes written count
restore.bytesWritten().atomicOp(tr, txBytes, MutationRef::Type::AddValue);
wait(tr->commit());
TraceEvent("FileRestoreCommittedLog")
.suppressFor(60)
.detail("RestoreUID", restore.getUid())
.detail("FileName", logFile.fileName)
.detail("FileBeginVersion", logFile.version)
.detail("FileEndVersion", logFile.endVersion)
.detail("FileSize", logFile.fileSize)
.detail("ReadOffset", readOffset)
.detail("ReadLen", readLen)
.detail("CommitVersion", tr->getCommittedVersion())
.detail("StartIndex", start)
.detail("EndIndex", i)
.detail("DataSize", data.size())
.detail("Bytes", txBytes)
.detail("TaskInstance", THIS_ADDR);
// Commit succeeded, so advance starting point
start = i;
tr->reset();
} catch(Error &e) {
if(e.code() == error_code_transaction_too_large)
dataSizeLimit /= 2;
else
wait(tr->onError(e));
}
}
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
RestoreConfig(task).fileBlocksFinished().atomicOp(tr, 1, MutationRef::Type::AddValue);
state Reference<TaskFuture> taskFuture = futureBucket->unpack(task->params[Task::reservedTaskParamKeyDone]);
// TODO: Check to see if there is a leak in the FutureBucket since an invalid task (validation key fails) will never set its taskFuture.
wait(taskFuture->set(tr, taskBucket) &&
taskBucket->finish(tr, task));
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, RestoreFile lf, int64_t offset, int64_t len, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key doneKey = wait(completionKey.get(tr, taskBucket));
state Reference<Task> task(new Task(RestoreLogDataTaskFunc::name, RestoreLogDataTaskFunc::version, doneKey));
// Create a restore config from the current task and bind it to the new task.
wait(RestoreConfig(parentTask).toTask(tr, task));
Params.inputFile().set(task, lf);
Params.readOffset().set(task, offset);
Params.readLen().set(task, len);
if (!waitFor) {
return taskBucket->addTask(tr, task);
}
wait(waitFor->onSetAddTask(tr, taskBucket, task));
return LiteralStringRef("OnSetAddTask");
}
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef RestoreLogDataTaskFunc::name = LiteralStringRef("restore_log_data");
const uint32_t RestoreLogDataTaskFunc::version = 1;
REGISTER_TASKFUNC(RestoreLogDataTaskFunc);
struct RestoreDispatchTaskFunc : RestoreTaskFuncBase {
static StringRef name;
static const uint32_t version;
StringRef getName() const { return name; };
static struct {
static TaskParam<Version> beginVersion() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<std::string> beginFile() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<int64_t> beginBlock() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<int64_t> batchSize() { return LiteralStringRef(__FUNCTION__); }
static TaskParam<int64_t> remainingInBatch() { return LiteralStringRef(__FUNCTION__); }
} Params;
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state RestoreConfig restore(task);
state Version beginVersion = Params.beginVersion().get(task);
state Reference<TaskFuture> onDone = futureBucket->unpack(task->params[Task::reservedTaskParamKeyDone]);
state int64_t remainingInBatch = Params.remainingInBatch().get(task);
state bool addingToExistingBatch = remainingInBatch > 0;
state Version restoreVersion;
wait(store(restoreVersion, restore.restoreVersion().getOrThrow(tr))
&& checkTaskVersion(tr->getDatabase(), task, name, version));
// If not adding to an existing batch then update the apply mutations end version so the mutations from the
// previous batch can be applied. Only do this once beginVersion is > 0 (it will be 0 for the initial dispatch).
if(!addingToExistingBatch && beginVersion > 0) {
restore.setApplyEndVersion(tr, std::min(beginVersion, restoreVersion + 1));
}
// The applyLag must be retrieved AFTER potentially updating the apply end version.
state int64_t applyLag = wait(restore.getApplyVersionLag(tr));
state int64_t batchSize = Params.batchSize().get(task);
// If starting a new batch and the apply lag is too large then re-queue and wait
if(!addingToExistingBatch && applyLag > (BUGGIFY ? 1 : CLIENT_KNOBS->CORE_VERSIONSPERSECOND * 300)) {
// Wait a small amount of time and then re-add this same task.
wait(delay(FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY));
wait(success(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, beginVersion, "", 0, batchSize, remainingInBatch)));
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("ApplyLag", applyLag)
.detail("BatchSize", batchSize)
.detail("Decision", "too_far_behind")
.detail("TaskInstance", THIS_ADDR);
wait(taskBucket->finish(tr, task));
return Void();
}
state std::string beginFile = Params.beginFile().getOrDefault(task);
// Get a batch of files. We're targeting batchSize blocks being dispatched so query for batchSize files (each of which is 0 or more blocks).
state int taskBatchSize = BUGGIFY ? 1 : CLIENT_KNOBS->RESTORE_DISPATCH_ADDTASK_SIZE;
state RestoreConfig::FileSetT::Values files = wait(restore.fileSet().getRange(tr, {beginVersion, beginFile}, {}, taskBatchSize));
// allPartsDone will be set once all block tasks in the current batch are finished.
state Reference<TaskFuture> allPartsDone;
// If adding to existing batch then join the new block tasks to the existing batch future
if(addingToExistingBatch) {
Key fKey = wait(restore.batchFuture().getD(tr));
allPartsDone = Reference<TaskFuture>(new TaskFuture(futureBucket, fKey));
}
else {
// Otherwise create a new future for the new batch
allPartsDone = futureBucket->future(tr);
restore.batchFuture().set(tr, allPartsDone->pack());
// Set batch quota remaining to batch size
remainingInBatch = batchSize;
}
// If there were no files to load then this batch is done and restore is almost done.
if(files.size() == 0) {
// If adding to existing batch then blocks could be in progress so create a new Dispatch task that waits for them to finish
if(addingToExistingBatch) {
// Setting next begin to restoreVersion + 1 so that any files in the file map at the restore version won't be dispatched again.
wait(success(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, restoreVersion + 1, "", 0, batchSize, 0, TaskCompletionKey::noSignal(), allPartsDone)));
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("BeginFile", Params.beginFile().get(task))
.detail("BeginBlock", Params.beginBlock().get(task))
.detail("RestoreVersion", restoreVersion)
.detail("ApplyLag", applyLag)
.detail("Decision", "end_of_final_batch")
.detail("TaskInstance", THIS_ADDR);
}
else if(beginVersion < restoreVersion) {
// If beginVersion is less than restoreVersion then do one more dispatch task to get there
wait(success(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, restoreVersion, "", 0, batchSize)));
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("BeginFile", Params.beginFile().get(task))
.detail("BeginBlock", Params.beginBlock().get(task))
.detail("RestoreVersion", restoreVersion)
.detail("ApplyLag", applyLag)
.detail("Decision", "apply_to_restore_version")
.detail("TaskInstance", THIS_ADDR);
}
else if(applyLag == 0) {
// If apply lag is 0 then we are done so create the completion task
wait(success(RestoreCompleteTaskFunc::addTask(tr, taskBucket, task, TaskCompletionKey::noSignal())));
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("BeginFile", Params.beginFile().get(task))
.detail("BeginBlock", Params.beginBlock().get(task))
.detail("ApplyLag", applyLag)
.detail("Decision", "restore_complete")
.detail("TaskInstance", THIS_ADDR);
} else {
// Applying of mutations is not yet finished so wait a small amount of time and then re-add this same task.
wait(delay(FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY));
wait(success(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, beginVersion, "", 0, batchSize)));
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("ApplyLag", applyLag)
.detail("Decision", "apply_still_behind")
.detail("TaskInstance", THIS_ADDR);
}
// If adding to existing batch then task is joined with a batch future so set done future
// Note that this must be done after joining at least one task with the batch future in case all other blockers already finished.
Future<Void> setDone = addingToExistingBatch ? onDone->set(tr, taskBucket) : Void();
wait(taskBucket->finish(tr, task) && setDone);
return Void();
}
// Start moving through the file list and queuing up blocks. Only queue up to RESTORE_DISPATCH_ADDTASK_SIZE blocks per Dispatch task
// and target batchSize total per batch but a batch must end on a complete version boundary so exceed the limit if necessary
// to reach the end of a version of files.
state std::vector<Future<Key>> addTaskFutures;
state Version endVersion = files[0].version;
state int blocksDispatched = 0;
state int64_t beginBlock = Params.beginBlock().getOrDefault(task);
state int i = 0;
for(; i < files.size(); ++i) {
RestoreConfig::RestoreFile &f = files[i];
// Here we are "between versions" (prior to adding the first block of the first file of a new version) so this is an opportunity
// to end the current dispatch batch (which must end on a version boundary) if the batch size has been reached or exceeded
if(f.version != endVersion && remainingInBatch <= 0) {
// Next start will be at the first version after endVersion at the first file first block
++endVersion;
beginFile = "";
beginBlock = 0;
break;
}
// Set the starting point for the next task in case we stop inside this file
endVersion = f.version;
beginFile = f.fileName;
state int64_t j = beginBlock * f.blockSize;
// For each block of the file
for(; j < f.fileSize; j += f.blockSize) {
// Stop if we've reached the addtask limit
if(blocksDispatched == taskBatchSize)
break;
if(f.isRange) {
addTaskFutures.push_back(RestoreRangeTaskFunc::addTask(tr, taskBucket, task,
f, j, std::min<int64_t>(f.blockSize, f.fileSize - j),
TaskCompletionKey::joinWith(allPartsDone)));
}
else {
addTaskFutures.push_back(RestoreLogDataTaskFunc::addTask(tr, taskBucket, task,
f, j, std::min<int64_t>(f.blockSize, f.fileSize - j),
TaskCompletionKey::joinWith(allPartsDone)));
}
// Increment beginBlock for the file and total blocks dispatched for this task
++beginBlock;
++blocksDispatched;
--remainingInBatch;
}
// Stop if we've reached the addtask limit
if(blocksDispatched == taskBatchSize)
break;
// We just completed an entire file so the next task should start at the file after this one within endVersion (or later)
// if this iteration ends up being the last for this task
beginFile = beginFile + '\x00';
beginBlock = 0;
TraceEvent("FileRestoreDispatchedFile")
.suppressFor(60)
.detail("RestoreUID", restore.getUid())
.detail("FileName", f.fileName)
.detail("TaskInstance", THIS_ADDR);
}
// If no blocks were dispatched then the next dispatch task should run now and be joined with the allPartsDone future
if(blocksDispatched == 0) {
std::string decision;
// If no files were dispatched either then the batch size wasn't large enough to catch all of the files at the next lowest non-dispatched
// version, so increase the batch size.
if(i == 0) {
batchSize *= 2;
decision = "increased_batch_size";
}
else
decision = "all_files_were_empty";
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("BeginFile", Params.beginFile().get(task))
.detail("BeginBlock", Params.beginBlock().get(task))
.detail("EndVersion", endVersion)
.detail("ApplyLag", applyLag)
.detail("BatchSize", batchSize)
.detail("Decision", decision)
.detail("TaskInstance", THIS_ADDR)
.detail("RemainingInBatch", remainingInBatch);
wait(success(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, endVersion, beginFile, beginBlock, batchSize, remainingInBatch, TaskCompletionKey::joinWith((allPartsDone)))));
// If adding to existing batch then task is joined with a batch future so set done future.
// Note that this must be done after joining at least one task with the batch future in case all other blockers already finished.
Future<Void> setDone = addingToExistingBatch ? onDone->set(tr, taskBucket) : Void();
wait(setDone && taskBucket->finish(tr, task));
return Void();
}
// Increment the number of blocks dispatched in the restore config
restore.filesBlocksDispatched().atomicOp(tr, blocksDispatched, MutationRef::Type::AddValue);
// If beginFile is not empty then we had to stop in the middle of a version (possibly within a file) so we cannot end
// the batch here because we do not know if we got all of the files and blocks from the last version queued, so
// make sure remainingInBatch is at least 1.
if(!beginFile.empty())
remainingInBatch = std::max<int64_t>(1, remainingInBatch);
// If more blocks need to be dispatched in this batch then add a follow-on task that is part of the allPartsDone group which will won't wait
// to run and will add more block tasks.
if(remainingInBatch > 0)
addTaskFutures.push_back(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, endVersion, beginFile, beginBlock, batchSize, remainingInBatch, TaskCompletionKey::joinWith(allPartsDone)));
else // Otherwise, add a follow-on task to continue after all previously dispatched blocks are done
addTaskFutures.push_back(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, endVersion, beginFile, beginBlock, batchSize, 0, TaskCompletionKey::noSignal(), allPartsDone));
wait(waitForAll(addTaskFutures));
// If adding to existing batch then task is joined with a batch future so set done future.
Future<Void> setDone = addingToExistingBatch ? onDone->set(tr, taskBucket) : Void();
wait(setDone && taskBucket->finish(tr, task));
TraceEvent("FileRestoreDispatch")
.detail("RestoreUID", restore.getUid())
.detail("BeginVersion", beginVersion)
.detail("BeginFile", Params.beginFile().get(task))
.detail("BeginBlock", Params.beginBlock().get(task))
.detail("EndVersion", endVersion)
.detail("ApplyLag", applyLag)
.detail("BatchSize", batchSize)
.detail("Decision", "dispatched_files")
.detail("FilesDispatched", i)
.detail("BlocksDispatched", blocksDispatched)
.detail("TaskInstance", THIS_ADDR)
.detail("RemainingInBatch", remainingInBatch);
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<Task> parentTask, Version beginVersion, std::string beginFile, int64_t beginBlock, int64_t batchSize, int64_t remainingInBatch = 0, TaskCompletionKey completionKey = TaskCompletionKey::noSignal(), Reference<TaskFuture> waitFor = Reference<TaskFuture>()) {
Key doneKey = wait(completionKey.get(tr, taskBucket));
// Use high priority for dispatch tasks that have to queue more blocks for the current batch
unsigned int priority = (remainingInBatch > 0) ? 1 : 0;
state Reference<Task> task(new Task(RestoreDispatchTaskFunc::name, RestoreDispatchTaskFunc::version, doneKey, priority));
// Create a config from the parent task and bind it to the new task
wait(RestoreConfig(parentTask).toTask(tr, task));
Params.beginVersion().set(task, beginVersion);
Params.batchSize().set(task, batchSize);
Params.remainingInBatch().set(task, remainingInBatch);
Params.beginBlock().set(task, beginBlock);
Params.beginFile().set(task, beginFile);
if (!waitFor) {
return taskBucket->addTask(tr, task);
}
wait(waitFor->onSetAddTask(tr, taskBucket, task));
return LiteralStringRef("OnSetAddTask");
}
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return Void(); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef RestoreDispatchTaskFunc::name = LiteralStringRef("restore_dispatch");
const uint32_t RestoreDispatchTaskFunc::version = 1;
REGISTER_TASKFUNC(RestoreDispatchTaskFunc);
ACTOR Future<std::string> restoreStatus(Reference<ReadYourWritesTransaction> tr, Key tagName) {
tr->setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state std::vector<KeyBackedTag> tags;
if(tagName.size() == 0) {
std::vector<KeyBackedTag> t = wait(getAllRestoreTags(tr));
tags = t;
}
else
tags.push_back(makeRestoreTag(tagName.toString()));
state std::string result;
state int i = 0;
for(; i < tags.size(); ++i) {
UidAndAbortedFlagT u = wait(tags[i].getD(tr));
std::string s = wait(RestoreConfig(u.first).getFullStatus(tr));
result.append(s);
result.append("\n\n");
}
return result;
}
ACTOR Future<ERestoreState> abortRestore(Reference<ReadYourWritesTransaction> tr, Key tagName) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
tr->setOption(FDBTransactionOptions::COMMIT_ON_FIRST_PROXY);
state KeyBackedTag tag = makeRestoreTag(tagName.toString());
state Optional<UidAndAbortedFlagT> current = wait(tag.get(tr));
if(!current.present())
return ERestoreState::UNITIALIZED;
state RestoreConfig restore(current.get().first);
state ERestoreState status = wait(restore.stateEnum().getD(tr));
state bool runnable = wait(restore.isRunnable(tr));
if (!runnable)
return status;
restore.stateEnum().set(tr, ERestoreState::ABORTED);
// Clear all of the ApplyMutations stuff
restore.clearApplyMutationsKeys(tr);
// Cancel the backup tasks on this tag
wait(tag.cancel(tr));
wait(unlockDatabase(tr, current.get().first));
return ERestoreState::ABORTED;
}
ACTOR Future<ERestoreState> abortRestore(Database cx, Key tagName) {
state Reference<ReadYourWritesTransaction> tr = Reference<ReadYourWritesTransaction>( new ReadYourWritesTransaction(cx) );
loop {
try {
ERestoreState estate = wait( abortRestore(tr, tagName) );
if(estate != ERestoreState::ABORTED) {
return estate;
}
wait(tr->commit());
break;
} catch( Error &e ) {
wait( tr->onError(e) );
}
}
tr = Reference<ReadYourWritesTransaction>( new ReadYourWritesTransaction(cx) );
//Commit a dummy transaction before returning success, to ensure the mutation applier has stopped submitting mutations
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
tr->setOption(FDBTransactionOptions::COMMIT_ON_FIRST_PROXY);
tr->addReadConflictRange(singleKeyRange(KeyRef()));
tr->addWriteConflictRange(singleKeyRange(KeyRef()));
wait(tr->commit());
return ERestoreState::ABORTED;
} catch( Error &e ) {
wait( tr->onError(e) );
}
}
}
struct StartFullRestoreTaskFunc : RestoreTaskFuncBase {
static StringRef name;
static const uint32_t version;
static struct {
static TaskParam<Version> firstVersion() { return LiteralStringRef(__FUNCTION__); }
} Params;
ACTOR static Future<Void> _execute(Database cx, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
state RestoreConfig restore(task);
state Version restoreVersion;
state Reference<IBackupContainer> bc;
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait(checkTaskVersion(tr->getDatabase(), task, name, version));
Version _restoreVersion = wait(restore.restoreVersion().getOrThrow(tr));
restoreVersion = _restoreVersion;
wait(taskBucket->keepRunning(tr, task));
ERestoreState oldState = wait(restore.stateEnum().getD(tr));
if(oldState != ERestoreState::QUEUED && oldState != ERestoreState::STARTING) {
wait(restore.logError(cx, restore_error(), format("StartFullRestore: Encountered unexpected state(%d)", oldState), THIS));
return Void();
}
restore.stateEnum().set(tr, ERestoreState::STARTING);
restore.fileSet().clear(tr);
restore.fileBlockCount().clear(tr);
restore.fileCount().clear(tr);
Reference<IBackupContainer> _bc = wait(restore.sourceContainer().getOrThrow(tr));
bc = _bc;
wait(tr->commit());
break;
} catch(Error &e) {
wait(tr->onError(e));
}
}
tr->reset();
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
Version destVersion = wait(tr->getReadVersion());
TraceEvent("FileRestoreVersionUpgrade").detail("RestoreVersion", restoreVersion).detail("Dest", destVersion);
if (destVersion <= restoreVersion) {
TEST(true); // Forcing restored cluster to higher version
tr->set(minRequiredCommitVersionKey, BinaryWriter::toValue(restoreVersion+1, Unversioned()));
wait(tr->commit());
} else {
break;
}
} catch( Error &e ) {
wait(tr->onError(e));
}
}
Optional<RestorableFileSet> restorable = wait(bc->getRestoreSet(restoreVersion));
if(!restorable.present())
throw restore_missing_data();
// First version for which log data should be applied
Params.firstVersion().set(task, restorable.get().snapshot.beginVersion);
// Convert the two lists in restorable (logs and ranges) to a single list of RestoreFiles.
// Order does not matter, they will be put in order when written to the restoreFileMap below.
state std::vector<RestoreConfig::RestoreFile> files;
for(const RangeFile &f : restorable.get().ranges) {
files.push_back({f.version, f.fileName, true, f.blockSize, f.fileSize});
}
for(const LogFile &f : restorable.get().logs) {
files.push_back({f.beginVersion, f.fileName, false, f.blockSize, f.fileSize, f.endVersion});
}
state std::vector<RestoreConfig::RestoreFile>::iterator start = files.begin();
state std::vector<RestoreConfig::RestoreFile>::iterator end = files.end();
tr->reset();
while(start != end) {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait(taskBucket->keepRunning(tr, task));
state std::vector<RestoreConfig::RestoreFile>::iterator i = start;
state int txBytes = 0;
state int nFileBlocks = 0;
state int nFiles = 0;
auto fileSet = restore.fileSet();
for(; i != end && txBytes < 1e6; ++i) {
txBytes += fileSet.insert(tr, *i);
nFileBlocks += (i->fileSize + i->blockSize - 1) / i->blockSize;
++nFiles;
}
restore.fileCount().atomicOp(tr, nFiles, MutationRef::Type::AddValue);
restore.fileBlockCount().atomicOp(tr, nFileBlocks, MutationRef::Type::AddValue);
wait(tr->commit());
TraceEvent("FileRestoreLoadedFiles")
.detail("RestoreUID", restore.getUid())
.detail("FileCount", nFiles)
.detail("FileBlockCount", nFileBlocks)
.detail("TransactionBytes", txBytes)
.detail("TaskInstance", THIS_ADDR);
start = i;
tr->reset();
} catch(Error &e) {
wait(tr->onError(e));
}
}
return Void();
}
ACTOR static Future<Void> _finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, Reference<FutureBucket> futureBucket, Reference<Task> task) {
state RestoreConfig restore(task);
state Version firstVersion = Params.firstVersion().getOrDefault(task, invalidVersion);
if(firstVersion == invalidVersion) {
wait(restore.logError(tr->getDatabase(), restore_missing_data(), "StartFullRestore: The backup had no data.", THIS));
std::string tag = wait(restore.tag().getD(tr));
wait(success(abortRestore(tr, StringRef(tag))));
return Void();
}
restore.stateEnum().set(tr, ERestoreState::RUNNING);
// Set applyMutation versions
restore.setApplyBeginVersion(tr, firstVersion);
restore.setApplyEndVersion(tr, firstVersion);
// Apply range data and log data in order
wait(success(RestoreDispatchTaskFunc::addTask(tr, taskBucket, task, 0, "", 0, CLIENT_KNOBS->RESTORE_DISPATCH_BATCH_SIZE)));
wait(taskBucket->finish(tr, task));
return Void();
}
ACTOR static Future<Key> addTask(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> taskBucket, UID uid, TaskCompletionKey completionKey, Reference<TaskFuture> waitFor = Reference<TaskFuture>())
{
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
Key doneKey = wait(completionKey.get(tr, taskBucket));
state Reference<Task> task(new Task(StartFullRestoreTaskFunc::name, StartFullRestoreTaskFunc::version, doneKey));
state RestoreConfig restore(uid);
// Bind the restore config to the new task
wait(restore.toTask(tr, task));
if (!waitFor) {
return taskBucket->addTask(tr, task);
}
wait(waitFor->onSetAddTask(tr, taskBucket, task));
return LiteralStringRef("OnSetAddTask");
}
StringRef getName() const { return name; };
Future<Void> execute(Database cx, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _execute(cx, tb, fb, task); };
Future<Void> finish(Reference<ReadYourWritesTransaction> tr, Reference<TaskBucket> tb, Reference<FutureBucket> fb, Reference<Task> task) { return _finish(tr, tb, fb, task); };
};
StringRef StartFullRestoreTaskFunc::name = LiteralStringRef("restore_start");
const uint32_t StartFullRestoreTaskFunc::version = 1;
REGISTER_TASKFUNC(StartFullRestoreTaskFunc);
}
struct LogInfo : public ReferenceCounted<LogInfo> {
std::string fileName;
Reference<IAsyncFile> logFile;
Version beginVersion;
Version endVersion;
int64_t offset;
LogInfo() : offset(0) {};
};
class FileBackupAgentImpl {
public:
static const int MAX_RESTORABLE_FILE_METASECTION_BYTES = 1024 * 8;
// Parallel restore
ACTOR static Future<Void> parallelRestoreFinish(Database cx, UID randomUID) {
state ReadYourWritesTransaction tr(cx);
state Optional<Value> restoreRequestDoneKeyValue;
TraceEvent("FastRestoreAgentWaitForRestoreToFinish").detail("DBLock", randomUID);
// TODO: register watch first and then check if the key exist
loop {
try {
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr.setOption(FDBTransactionOptions::LOCK_AWARE);
Optional<Value> _restoreRequestDoneKeyValue = wait(tr.get(restoreRequestDoneKey));
restoreRequestDoneKeyValue = _restoreRequestDoneKeyValue;
// Restore may finish before restoreAgent waits on the restore finish event.
if (restoreRequestDoneKeyValue.present()) {
break;
} else {
state Future<Void> watchForRestoreRequestDone = tr.watch(restoreRequestDoneKey);
wait(tr.commit());
wait(watchForRestoreRequestDone);
break;
}
} catch (Error& e) {
wait(tr.onError(e));
}
}
TraceEvent("FastRestoreAgentRestoreFinished")
.detail("ClearRestoreRequestDoneKey", restoreRequestDoneKeyValue.present());
// Only this agent can clear the restoreRequestDoneKey
wait(runRYWTransaction(cx, [](Reference<ReadYourWritesTransaction> tr) -> Future<Void> {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
tr->clear(restoreRequestDoneKey);
return Void();
}));
TraceEvent("FastRestoreAgentRestoreFinished").detail("UnlockDBStart", randomUID);
try {
wait(unlockDatabase(cx, randomUID));
} catch (Error& e) {
if (e.code() == error_code_operation_cancelled) { // Should only happen in simulation
TraceEvent(SevWarnAlways, "FastRestoreAgentOnCancelingActor")
.detail("DBLock", randomUID)
.detail("ManualCheck", "Is DB locked");
} else {
TraceEvent(SevError, "FastRestoreAgentUnlockDBFailed")
.detail("DBLock", randomUID)
.detail("ErrorCode", e.code())
.detail("Error", e.what());
ASSERT_WE_THINK(false); // This unlockDatabase should always succeed, we think.
}
}
TraceEvent("FastRestoreAgentRestoreFinished").detail("UnlockDBFinish", randomUID);
return Void();
}
ACTOR static Future<Void> submitParallelRestore(Database cx, Key backupTag,
Standalone<VectorRef<KeyRangeRef>> backupRanges, Key bcUrl,
Version targetVersion, bool lockDB, UID randomUID) {
// Sanity check backup is valid
state Reference<IBackupContainer> bc = IBackupContainer::openContainer(bcUrl.toString());
state BackupDescription desc = wait(bc->describeBackup());
wait(desc.resolveVersionTimes(cx));
if (targetVersion == invalidVersion && desc.maxRestorableVersion.present()) {
targetVersion = desc.maxRestorableVersion.get();
TraceEvent(SevWarn, "FastRestoreSubmitRestoreRequestWithInvalidTargetVersion")
.detail("OverrideTargetVersion", targetVersion);
}
Optional<RestorableFileSet> restoreSet = wait(bc->getRestoreSet(targetVersion));
if (!restoreSet.present()) {
TraceEvent(SevWarn, "FileBackupAgentRestoreNotPossible")
.detail("BackupContainer", bc->getURL())
.detail("TargetVersion", targetVersion);
throw restore_invalid_version();
}
TraceEvent("FastRestoreSubmitRestoreRequest")
.detail("BackupDesc", desc.toString())
.detail("TargetVersion", targetVersion);
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
state int restoreIndex = 0;
state int numTries = 0;
// lock DB for restore
loop {
try {
if (lockDB) {
wait(lockDatabase(cx, randomUID));
}
tr->reset();
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait(checkDatabaseLock(tr, randomUID));
TraceEvent("FastRestoreAgentSubmitRestoreRequests").detail("DBIsLocked", randomUID);
break;
} catch (Error& e) {
TraceEvent(numTries > 50 ? SevError : SevWarnAlways, "FastRestoreAgentSubmitRestoreRequestsMayFail")
.detail("Reason", "DB is not properly locked")
.detail("ExpectedLockID", randomUID)
.error(e);
numTries++;
wait(tr->onError(e));
}
}
// set up restore request
tr->reset();
loop {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
try {
// Note: we always lock DB here in case DB is modified at the bacupRanges boundary.
for (restoreIndex = 0; restoreIndex < backupRanges.size(); restoreIndex++) {
auto range = backupRanges[restoreIndex];
Standalone<StringRef> restoreTag(backupTag.toString() + "_" + std::to_string(restoreIndex));
// Register the request request in DB, which will be picked up by restore worker leader
struct RestoreRequest restoreRequest(restoreIndex, restoreTag, bcUrl, targetVersion, range,
deterministicRandom()->randomUniqueID());
tr->set(restoreRequestKeyFor(restoreRequest.index), restoreRequestValue(restoreRequest));
}
tr->set(restoreRequestTriggerKey,
restoreRequestTriggerValue(deterministicRandom()->randomUniqueID(), backupRanges.size()));
wait(tr->commit()); // Trigger restore
break;
} catch (Error& e) {
wait(tr->onError(e));
}
}
return Void();
}
// This method will return the final status of the backup at tag, and return the URL that was used on the tag
// when that status value was read.
ACTOR static Future<int> waitBackup(FileBackupAgent* backupAgent, Database cx, std::string tagName, bool stopWhenDone, Reference<IBackupContainer> *pContainer = nullptr, UID *pUID = nullptr) {
state std::string backTrace;
state KeyBackedTag tag = makeBackupTag(tagName);
loop {
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
try {
state Optional<UidAndAbortedFlagT> oldUidAndAborted = wait(tag.get(tr));
if (!oldUidAndAborted.present()) {
return EBackupState::STATE_NEVERRAN;
}
state BackupConfig config(oldUidAndAborted.get().first);
state EBackupState status = wait(config.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
// Break, if one of the following is true
// - no longer runnable
// - in differential mode (restorable) and stopWhenDone is not enabled
if( !FileBackupAgent::isRunnable(status) || ((!stopWhenDone) && (BackupAgentBase::STATE_RUNNING_DIFFERENTIAL == status) )) {
if(pContainer != nullptr) {
Reference<IBackupContainer> c = wait(config.backupContainer().getOrThrow(tr, false, backup_invalid_info()));
*pContainer = c;
}
if(pUID != nullptr) {
*pUID = oldUidAndAborted.get().first;
}
return status;
}
state Future<Void> watchFuture = tr->watch( config.stateEnum().key );
wait( tr->commit() );
wait( watchFuture );
}
catch (Error &e) {
wait(tr->onError(e));
}
}
}
ACTOR static Future<Void> submitBackup(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr,
Key outContainer, int snapshotIntervalSeconds, std::string tagName,
Standalone<VectorRef<KeyRangeRef>> backupRanges, bool stopWhenDone,
bool partitionedLog) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
tr->setOption(FDBTransactionOptions::COMMIT_ON_FIRST_PROXY);
TraceEvent(SevInfo, "FBA_SubmitBackup")
.detail("TagName", tagName.c_str())
.detail("StopWhenDone", stopWhenDone)
.detail("UsePartitionedLog", partitionedLog)
.detail("OutContainer", outContainer.toString());
state KeyBackedTag tag = makeBackupTag(tagName);
Optional<UidAndAbortedFlagT> uidAndAbortedFlag = wait(tag.get(tr));
if (uidAndAbortedFlag.present()) {
state BackupConfig prevConfig(uidAndAbortedFlag.get().first);
state EBackupState prevBackupStatus = wait(prevConfig.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
if (FileBackupAgent::isRunnable(prevBackupStatus)) {
throw backup_duplicate();
}
// Now is time to clear prev backup config space. We have no more use for it.
prevConfig.clear(tr);
}
state BackupConfig config(deterministicRandom()->randomUniqueID());
state UID uid = config.getUid();
// This check will ensure that current backupUid is later than the last backup Uid
state Standalone<StringRef> nowStr = BackupAgentBase::getCurrentTime();
state std::string backupContainer = outContainer.toString();
// To be consistent with directory handling behavior since FDB backup was first released, if the container string
// describes a local directory then "/backup-<timestamp>" will be added to it.
if(backupContainer.find("file://") == 0) {
backupContainer = joinPath(backupContainer, std::string("backup-") + nowStr.toString());
}
state Reference<IBackupContainer> bc = IBackupContainer::openContainer(backupContainer);
try {
wait(timeoutError(bc->create(), 30));
} catch(Error &e) {
if(e.code() == error_code_actor_cancelled)
throw;
fprintf(stderr, "ERROR: Could not create backup container: %s\n", e.what());
throw backup_error();
}
Optional<Value> lastBackupTimestamp = wait(backupAgent->lastBackupTimestamp().get(tr));
if ((lastBackupTimestamp.present()) && (lastBackupTimestamp.get() >= nowStr)) {
fprintf(stderr, "ERROR: The last backup `%s' happened in the future.\n", printable(lastBackupTimestamp.get()).c_str());
throw backup_error();
}
KeyRangeMap<int> backupRangeSet;
for (auto& backupRange : backupRanges) {
backupRangeSet.insert(backupRange, 1);
}
backupRangeSet.coalesce(allKeys);
state std::vector<KeyRange> normalizedRanges;
for (auto& backupRange : backupRangeSet.ranges()) {
if (backupRange.value()) {
normalizedRanges.push_back(KeyRange(KeyRangeRef(backupRange.range().begin, backupRange.range().end)));
}
}
config.clear(tr);
state Key destUidValue(BinaryWriter::toValue(uid, Unversioned()));
if (normalizedRanges.size() == 1) {
Standalone<RangeResultRef> existingDestUidValues = wait(tr->getRange(KeyRangeRef(destUidLookupPrefix, strinc(destUidLookupPrefix)), CLIENT_KNOBS->TOO_MANY));
bool found = false;
for(auto it : existingDestUidValues) {
if( BinaryReader::fromStringRef<KeyRange>(it.key.removePrefix(destUidLookupPrefix), IncludeVersion()) == normalizedRanges[0] ) {
destUidValue = it.value;
found = true;
break;
}
}
if( !found ) {
destUidValue = BinaryWriter::toValue(deterministicRandom()->randomUniqueID(), Unversioned());
tr->set(BinaryWriter::toValue(normalizedRanges[0], IncludeVersion(ProtocolVersion::withSharedMutations())).withPrefix(destUidLookupPrefix), destUidValue);
}
}
tr->set(config.getUidAsKey().withPrefix(destUidValue).withPrefix(backupLatestVersionsPrefix), BinaryWriter::toValue<Version>(tr->getReadVersion().get(), Unversioned()));
config.destUidValue().set(tr, destUidValue);
// Point the tag to this new uid
tag.set(tr, {uid, false});
backupAgent->lastBackupTimestamp().set(tr, nowStr);
// Set the backup keys
config.tag().set(tr, tagName);
config.stateEnum().set(tr, EBackupState::STATE_SUBMITTED);
config.backupContainer().set(tr, bc);
config.stopWhenDone().set(tr, stopWhenDone);
config.backupRanges().set(tr, normalizedRanges);
config.snapshotIntervalSeconds().set(tr, snapshotIntervalSeconds);
config.partitionedLogEnabled().set(tr, partitionedLog);
Key taskKey = wait(fileBackup::StartFullBackupTaskFunc::addTask(tr, backupAgent->taskBucket, uid, TaskCompletionKey::noSignal()));
return Void();
}
ACTOR static Future<Void> submitRestore(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr, Key tagName, Key backupURL, Standalone<VectorRef<KeyRangeRef>> ranges, Version restoreVersion, Key addPrefix, Key removePrefix, bool lockDB, UID uid) {
KeyRangeMap<int> restoreRangeSet;
for (auto& range : ranges) {
restoreRangeSet.insert(range, 1);
}
restoreRangeSet.coalesce(allKeys);
state std::vector<KeyRange> restoreRanges;
for (auto& restoreRange : restoreRangeSet.ranges()) {
if (restoreRange.value()) {
restoreRanges.push_back(KeyRange(KeyRangeRef(restoreRange.range().begin, restoreRange.range().end)));
}
}
for (auto &restoreRange : restoreRanges)
ASSERT(restoreRange.contains(removePrefix) || removePrefix.size() == 0);
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
// Get old restore config for this tag
state KeyBackedTag tag = makeRestoreTag(tagName.toString());
state Optional<UidAndAbortedFlagT> oldUidAndAborted = wait(tag.get(tr));
if(oldUidAndAborted.present()) {
if (oldUidAndAborted.get().first == uid) {
if (oldUidAndAborted.get().second) {
throw restore_duplicate_uid();
}
else {
return Void();
}
}
state RestoreConfig oldRestore(oldUidAndAborted.get().first);
// Make sure old restore for this tag is not runnable
bool runnable = wait(oldRestore.isRunnable(tr));
if (runnable) {
throw restore_duplicate_tag();
}
// Clear the old restore config
oldRestore.clear(tr);
}
state int index;
for (index = 0; index < restoreRanges.size(); index++) {
KeyRange restoreIntoRange = KeyRangeRef(restoreRanges[index].begin, restoreRanges[index].end).removePrefix(removePrefix).withPrefix(addPrefix);
Standalone<RangeResultRef> existingRows = wait(tr->getRange(restoreIntoRange, 1));
if (existingRows.size() > 0) {
throw restore_destination_not_empty();
}
}
// Make new restore config
state RestoreConfig restore(uid);
// Point the tag to the new uid
tag.set(tr, {uid, false});
Reference<IBackupContainer> bc = IBackupContainer::openContainer(backupURL.toString());
// Configure the new restore
restore.tag().set(tr, tagName.toString());
restore.sourceContainer().set(tr, bc);
restore.stateEnum().set(tr, ERestoreState::QUEUED);
restore.restoreVersion().set(tr, restoreVersion);
if (BUGGIFY && restoreRanges.size() == 1) {
restore.restoreRange().set(tr, restoreRanges[0]);
}
else {
restore.restoreRanges().set(tr, restoreRanges);
}
// this also sets restore.add/removePrefix.
restore.initApplyMutations(tr, addPrefix, removePrefix);
Key taskKey = wait(fileBackup::StartFullRestoreTaskFunc::addTask(tr, backupAgent->taskBucket, uid, TaskCompletionKey::noSignal()));
if (lockDB)
wait(lockDatabase(tr, uid));
else
wait(checkDatabaseLock(tr, uid));
return Void();
}
// This method will return the final status of the backup
ACTOR static Future<ERestoreState> waitRestore(Database cx, Key tagName, bool verbose) {
state ERestoreState status;
loop {
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
try {
tr->setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag = makeRestoreTag(tagName.toString());
Optional<UidAndAbortedFlagT> current = wait(tag.get(tr));
if(!current.present()) {
if(verbose)
printf("waitRestore: Tag: %s State: %s\n", tagName.toString().c_str(),
FileBackupAgent::restoreStateText(ERestoreState::UNITIALIZED).toString().c_str());
return ERestoreState::UNITIALIZED;
}
state RestoreConfig restore(current.get().first);
if(verbose) {
state std::string details = wait(restore.getProgress(tr));
printf("%s\n", details.c_str());
}
ERestoreState status_ = wait(restore.stateEnum().getD(tr));
status = status_;
state bool runnable = wait(restore.isRunnable(tr));
// State won't change from here
if (!runnable)
break;
// Wait for a change
state Future<Void> watchFuture = tr->watch(restore.stateEnum().key);
wait(tr->commit());
if(verbose)
wait(watchFuture || delay(1));
else
wait(watchFuture);
}
catch (Error &e) {
wait(tr->onError(e));
}
}
return status;
}
ACTOR static Future<Void> discontinueBackup(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr, Key tagName) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag = makeBackupTag(tagName.toString());
state UidAndAbortedFlagT current = wait(tag.getOrThrow(tr, false, backup_unneeded()));
state BackupConfig config(current.first);
state EBackupState status = wait(config.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
if (!FileBackupAgent::isRunnable(status)) {
throw backup_unneeded();
}
// If the backup is already restorable then 'mostly' abort it - cancel all tasks via the tag
// and clear the mutation logging config and data - but set its state as COMPLETED instead of ABORTED.
state Optional<Version> latestRestorableVersion = wait(config.getLatestRestorableVersion(tr));
TraceEvent(SevInfo, "FBA_DiscontinueBackup")
.detail("AlreadyRestorable", latestRestorableVersion.present() ? "Yes" : "No")
.detail("TagName", tag.tagName.c_str())
.detail("Status", BackupAgentBase::getStateText(status));
if(latestRestorableVersion.present()) {
// Cancel all backup tasks through tag
wait(tag.cancel(tr));
tr->setOption(FDBTransactionOptions::COMMIT_ON_FIRST_PROXY);
state Key destUidValue = wait(config.destUidValue().getOrThrow(tr));
wait(success(tr->getReadVersion()));
wait(eraseLogData(tr, config.getUidAsKey(), destUidValue) &&
fileBackup::clearBackupStartID(tr, config.getUid()));
config.stateEnum().set(tr, EBackupState::STATE_COMPLETED);
return Void();
}
state bool stopWhenDone = wait(config.stopWhenDone().getOrThrow(tr));
if (stopWhenDone) {
throw backup_duplicate();
}
config.stopWhenDone().set(tr, true);
return Void();
}
ACTOR static Future<Void> abortBackup(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr, std::string tagName) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag = makeBackupTag(tagName);
state UidAndAbortedFlagT current = wait(tag.getOrThrow(tr, false, backup_unneeded()));
state BackupConfig config(current.first);
state Key destUidValue = wait(config.destUidValue().getOrThrow(tr));
EBackupState status = wait(config.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
if (!backupAgent->isRunnable((BackupAgentBase::enumState)status)) {
throw backup_unneeded();
}
TraceEvent(SevInfo, "FBA_AbortBackup")
.detail("TagName", tagName.c_str())
.detail("Status", BackupAgentBase::getStateText(status));
// Cancel backup task through tag
wait(tag.cancel(tr));
wait(eraseLogData(tr, config.getUidAsKey(), destUidValue) &&
fileBackup::clearBackupStartID(tr, config.getUid()));
config.stateEnum().set(tr, EBackupState::STATE_ABORTED);
return Void();
}
ACTOR static Future<Void> changePause(FileBackupAgent* backupAgent, Database db, bool pause) {
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(db));
state Future<Void> change = backupAgent->taskBucket->changePause(db, pause);
loop {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
tr->setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
try {
tr->set(backupPausedKey, pause ? LiteralStringRef("1") : LiteralStringRef("0"));
wait(tr->commit());
break;
} catch (Error& e) {
wait(tr->onError(e));
}
}
wait(change);
TraceEvent("FileBackupAgentChangePaused").detail("Action", pause ? "Paused" : "Resumed");
return Void();
}
struct TimestampedVersion {
Optional<Version> version;
Optional<int64_t> epochs;
bool present() const {
return version.present();
}
JsonBuilderObject toJSON() const {
JsonBuilderObject doc;
if(version.present()) {
doc.setKey("Version", version.get());
if(epochs.present()) {
doc.setKey("EpochSeconds", epochs.get());
doc.setKey("Timestamp", timeStampToString(epochs));
}
}
return doc;
}
};
// Helper actor for generating status
// If f is present, lookup epochs using timekeeper and tr, return TimestampedVersion
ACTOR static Future<TimestampedVersion> getTimestampedVersion(Reference<ReadYourWritesTransaction> tr, Future<Optional<Version>> f) {
state TimestampedVersion tv;
wait(store(tv.version, f));
if(tv.version.present()) {
wait(store(tv.epochs, timeKeeperEpochsFromVersion(tv.version.get(), tr)));
}
return tv;
}
ACTOR static Future<std::string> getStatusJSON(FileBackupAgent* backupAgent, Database cx, std::string tagName) {
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
loop {
try {
state JsonBuilderObject doc;
doc.setKey("SchemaVersion", "1.0.0");
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag = makeBackupTag(tagName);
state Optional<UidAndAbortedFlagT> uidAndAbortedFlag;
state Optional<Value> paused;
state Version recentReadVersion;
wait( store(paused, tr->get(backupAgent->taskBucket->getPauseKey())) && store(uidAndAbortedFlag, tag.get(tr)) && store(recentReadVersion, tr->getReadVersion()) );
doc.setKey("BackupAgentsPaused", paused.present());
doc.setKey("Tag", tag.tagName);
if(uidAndAbortedFlag.present()) {
doc.setKey("UID", uidAndAbortedFlag.get().first.toString());
state BackupConfig config(uidAndAbortedFlag.get().first);
state EBackupState backupState = wait(config.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
JsonBuilderObject statusDoc;
statusDoc.setKey("Name", BackupAgentBase::getStateName(backupState));
statusDoc.setKey("Description", BackupAgentBase::getStateText(backupState));
statusDoc.setKey("Completed", backupState == BackupAgentBase::STATE_COMPLETED);
statusDoc.setKey("Running", BackupAgentBase::isRunnable(backupState));
doc.setKey("Status", statusDoc);
state Future<Void> done = Void();
if(backupState != BackupAgentBase::STATE_NEVERRAN) {
state Reference<IBackupContainer> bc;
state TimestampedVersion latestRestorable;
wait( store(latestRestorable, getTimestampedVersion(tr, config.getLatestRestorableVersion(tr)))
&& store(bc, config.backupContainer().getOrThrow(tr))
);
doc.setKey("Restorable", latestRestorable.present());
if(latestRestorable.present()) {
JsonBuilderObject o = latestRestorable.toJSON();
if(backupState != BackupAgentBase::STATE_COMPLETED) {
o.setKey("LagSeconds", (recentReadVersion - latestRestorable.version.get()) / CLIENT_KNOBS->CORE_VERSIONSPERSECOND);
}
doc.setKey("LatestRestorablePoint", o);
}
doc.setKey("DestinationURL", bc->getURL());
}
if(backupState == BackupAgentBase::STATE_RUNNING_DIFFERENTIAL || backupState == BackupAgentBase::STATE_RUNNING) {
state int64_t snapshotInterval;
state int64_t logBytesWritten;
state int64_t rangeBytesWritten;
state bool stopWhenDone;
state TimestampedVersion snapshotBegin;
state TimestampedVersion snapshotTargetEnd;
state TimestampedVersion latestLogEnd;
state TimestampedVersion latestSnapshotEnd;
state TimestampedVersion snapshotLastDispatch;
state Optional<int64_t> snapshotLastDispatchShardsBehind;
wait( store(snapshotInterval, config.snapshotIntervalSeconds().getOrThrow(tr))
&& store(logBytesWritten, config.logBytesWritten().getD(tr))
&& store(rangeBytesWritten, config.rangeBytesWritten().getD(tr))
&& store(stopWhenDone, config.stopWhenDone().getOrThrow(tr))
&& store(snapshotBegin, getTimestampedVersion(tr, config.snapshotBeginVersion().get(tr)))
&& store(snapshotTargetEnd, getTimestampedVersion(tr, config.snapshotTargetEndVersion().get(tr)))
&& store(latestLogEnd, getTimestampedVersion(tr, config.latestLogEndVersion().get(tr)))
&& store(latestSnapshotEnd, getTimestampedVersion(tr, config.latestSnapshotEndVersion().get(tr)))
&& store(snapshotLastDispatch, getTimestampedVersion(tr, config.snapshotDispatchLastVersion().get(tr)))
&& store(snapshotLastDispatchShardsBehind, config.snapshotDispatchLastShardsBehind().get(tr))
);
doc.setKey("StopAfterSnapshot", stopWhenDone);
doc.setKey("SnapshotIntervalSeconds", snapshotInterval);
doc.setKey("LogBytesWritten", logBytesWritten);
doc.setKey("RangeBytesWritten", rangeBytesWritten);
if(latestLogEnd.present()) {
doc.setKey("LatestLogEnd", latestLogEnd.toJSON());
}
if(latestSnapshotEnd.present()) {
doc.setKey("LatestSnapshotEnd", latestSnapshotEnd.toJSON());
}
JsonBuilderObject snapshot;
if(snapshotBegin.present()) {
snapshot.setKey("Begin", snapshotBegin.toJSON());
if(snapshotTargetEnd.present()) {
snapshot.setKey("EndTarget", snapshotTargetEnd.toJSON());
Version interval = snapshotTargetEnd.version.get() - snapshotBegin.version.get();
snapshot.setKey("IntervalSeconds", interval / CLIENT_KNOBS->CORE_VERSIONSPERSECOND);
Version elapsed = recentReadVersion - snapshotBegin.version.get();
double progress = (interval > 0) ? (100.0 * elapsed / interval) : 100;
snapshot.setKey("ExpectedProgress", progress);
}
JsonBuilderObject dispatchDoc = snapshotLastDispatch.toJSON();
if(snapshotLastDispatchShardsBehind.present()) {
dispatchDoc.setKey("ShardsBehind", snapshotLastDispatchShardsBehind.get());
}
snapshot.setKey("LastDispatch", dispatchDoc);
}
doc.setKey("CurrentSnapshot", snapshot);
}
KeyBackedMap<int64_t, std::pair<std::string, Version>>::PairsType errors = wait(config.lastErrorPerType().getRange(tr, 0, std::numeric_limits<int>::max(), CLIENT_KNOBS->TOO_MANY));
JsonBuilderArray errorList;
for(auto &e : errors) {
std::string msg = e.second.first;
Version ver = e.second.second;
JsonBuilderObject errDoc;
errDoc.setKey("Message", msg.c_str());
errDoc.setKey("RelativeSeconds", (ver - recentReadVersion) / CLIENT_KNOBS->CORE_VERSIONSPERSECOND);
}
doc.setKey("Errors", errorList);
}
return doc.getJson();
}
catch (Error &e) {
wait(tr->onError(e));
}
}
}
ACTOR static Future<std::string> getStatus(FileBackupAgent* backupAgent, Database cx, bool showErrors, std::string tagName) {
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
state std::string statusText;
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag;
state BackupConfig config;
state EBackupState backupState;
statusText = "";
tag = makeBackupTag(tagName);
state Optional<UidAndAbortedFlagT> uidAndAbortedFlag = wait(tag.get(tr));
state Future<Optional<Value>> fPaused = tr->get(backupAgent->taskBucket->getPauseKey());
if (uidAndAbortedFlag.present()) {
config = BackupConfig(uidAndAbortedFlag.get().first);
EBackupState status = wait(config.stateEnum().getD(tr, false, EBackupState::STATE_NEVERRAN));
backupState = status;
}
if (!uidAndAbortedFlag.present() || backupState == EBackupState::STATE_NEVERRAN) {
statusText += "No previous backups found.\n";
} else {
state std::string backupStatus(BackupAgentBase::getStateText(backupState));
state Reference<IBackupContainer> bc;
state Optional<Version> latestRestorableVersion;
state Version recentReadVersion;
wait( store(latestRestorableVersion, config.getLatestRestorableVersion(tr))
&& store(bc, config.backupContainer().getOrThrow(tr))
&& store(recentReadVersion, tr->getReadVersion())
);
bool snapshotProgress = false;
switch (backupState) {
case BackupAgentBase::STATE_SUBMITTED:
statusText += "The backup on tag `" + tagName + "' is in progress (just started) to " + bc->getURL() + ".\n";
break;
case BackupAgentBase::STATE_RUNNING:
statusText += "The backup on tag `" + tagName + "' is in progress to " + bc->getURL() + ".\n";
snapshotProgress = true;
break;
case BackupAgentBase::STATE_RUNNING_DIFFERENTIAL:
statusText += "The backup on tag `" + tagName + "' is restorable but continuing to " + bc->getURL() + ".\n";
snapshotProgress = true;
break;
case BackupAgentBase::STATE_COMPLETED:
statusText += "The previous backup on tag `" + tagName + "' at " + bc->getURL() + " completed at version " + format("%lld", latestRestorableVersion.orDefault(-1)) + ".\n";
break;
default:
statusText += "The previous backup on tag `" + tagName + "' at " + bc->getURL() + " " + backupStatus + ".\n";
break;
}
statusText += format("BackupUID: %s\n", uidAndAbortedFlag.get().first.toString().c_str());
statusText += format("BackupURL: %s\n", bc->getURL().c_str());
if(snapshotProgress) {
state int64_t snapshotInterval;
state Version snapshotBeginVersion;
state Version snapshotTargetEndVersion;
state Optional<Version> latestSnapshotEndVersion;
state Optional<Version> latestLogEndVersion;
state Optional<int64_t> logBytesWritten;
state Optional<int64_t> rangeBytesWritten;
state Optional<int64_t> latestSnapshotEndVersionTimestamp;
state Optional<int64_t> latestLogEndVersionTimestamp;
state Optional<int64_t> snapshotBeginVersionTimestamp;
state Optional<int64_t> snapshotTargetEndVersionTimestamp;
state bool stopWhenDone;
wait( store(snapshotBeginVersion, config.snapshotBeginVersion().getOrThrow(tr))
&& store(snapshotTargetEndVersion, config.snapshotTargetEndVersion().getOrThrow(tr))
&& store(snapshotInterval, config.snapshotIntervalSeconds().getOrThrow(tr))
&& store(logBytesWritten, config.logBytesWritten().get(tr))
&& store(rangeBytesWritten, config.rangeBytesWritten().get(tr))
&& store(latestLogEndVersion, config.latestLogEndVersion().get(tr))
&& store(latestSnapshotEndVersion, config.latestSnapshotEndVersion().get(tr))
&& store(stopWhenDone, config.stopWhenDone().getOrThrow(tr))
);
wait( store(latestSnapshotEndVersionTimestamp, getTimestampFromVersion(latestSnapshotEndVersion, tr))
&& store(latestLogEndVersionTimestamp, getTimestampFromVersion(latestLogEndVersion, tr))
&& store(snapshotBeginVersionTimestamp, timeKeeperEpochsFromVersion(snapshotBeginVersion, tr))
&& store(snapshotTargetEndVersionTimestamp, timeKeeperEpochsFromVersion(snapshotTargetEndVersion, tr))
);
statusText += format("Snapshot interval is %lld seconds. ", snapshotInterval);
if(backupState == BackupAgentBase::STATE_RUNNING_DIFFERENTIAL)
statusText += format("Current snapshot progress target is %3.2f%% (>100%% means the snapshot is supposed to be done)\n", 100.0 * (recentReadVersion - snapshotBeginVersion) / (snapshotTargetEndVersion - snapshotBeginVersion)) ;
else
statusText += "The initial snapshot is still running.\n";
statusText += format("\nDetails:\n LogBytes written - %ld\n RangeBytes written - %ld\n "
"Last complete log version and timestamp - %s, %s\n "
"Last complete snapshot version and timestamp - %s, %s\n "
"Current Snapshot start version and timestamp - %s, %s\n "
"Expected snapshot end version and timestamp - %s, %s\n "
"Backup supposed to stop at next snapshot completion - %s\n",
logBytesWritten.orDefault(0), rangeBytesWritten.orDefault(0),
versionToString(latestLogEndVersion).c_str(), timeStampToString(latestLogEndVersionTimestamp).c_str(),
versionToString(latestSnapshotEndVersion).c_str(), timeStampToString(latestSnapshotEndVersionTimestamp).c_str(),
versionToString(snapshotBeginVersion).c_str(), timeStampToString(snapshotBeginVersionTimestamp).c_str(),
versionToString(snapshotTargetEndVersion).c_str(), timeStampToString(snapshotTargetEndVersionTimestamp).c_str(),
boolToYesOrNo(stopWhenDone).c_str());
}
// Append the errors, if requested
if (showErrors) {
KeyBackedMap<int64_t, std::pair<std::string, Version>>::PairsType errors = wait(config.lastErrorPerType().getRange(tr, 0, std::numeric_limits<int>::max(), CLIENT_KNOBS->TOO_MANY));
std::string recentErrors;
std::string pastErrors;
for(auto &e : errors) {
Version v = e.second.second;
std::string msg = format("%s ago : %s\n", secondsToTimeFormat((recentReadVersion - v) / CLIENT_KNOBS->CORE_VERSIONSPERSECOND).c_str(), e.second.first.c_str());
// If error version is at or more recent than the latest restorable version then it could be inhibiting progress
if(v >= latestRestorableVersion.orDefault(0)) {
recentErrors += msg;
}
else {
pastErrors += msg;
}
}
if (!recentErrors.empty()) {
if (latestRestorableVersion.present())
statusText += format("Recent Errors (since latest restorable point %s ago)\n",
secondsToTimeFormat((recentReadVersion - latestRestorableVersion.get()) / CLIENT_KNOBS->CORE_VERSIONSPERSECOND).c_str())
+ recentErrors;
else
statusText += "Recent Errors (since initialization)\n" + recentErrors;
}
if(!pastErrors.empty())
statusText += "Older Errors\n" + pastErrors;
}
}
Optional<Value> paused = wait(fPaused);
if(paused.present()) {
statusText += format("\nAll backup agents have been paused.\n");
}
break;
}
catch (Error &e) {
wait(tr->onError(e));
}
}
return statusText;
}
ACTOR static Future<Version> getLastRestorable(FileBackupAgent* backupAgent, Reference<ReadYourWritesTransaction> tr, Key tagName, bool snapshot) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Optional<Value> version = wait(tr->get(backupAgent->lastRestorable.pack(tagName), snapshot));
return (version.present()) ? BinaryReader::fromStringRef<Version>(version.get(), Unversioned()) : 0;
}
static StringRef read(StringRef& data, int bytes) {
if (bytes > data.size()) throw restore_error();
StringRef r = data.substr(0, bytes);
data = data.substr(bytes);
return r;
}
ACTOR static Future<Version> restore(FileBackupAgent* backupAgent, Database cx, Optional<Database> cxOrig,
Key tagName, Key url, Standalone<VectorRef<KeyRangeRef>> ranges,
bool waitForComplete, Version targetVersion, bool verbose, Key addPrefix,
Key removePrefix, bool lockDB, UID randomUid) {
state Reference<IBackupContainer> bc = IBackupContainer::openContainer(url.toString());
state BackupDescription desc = wait(bc->describeBackup());
if(cxOrig.present()) {
wait(desc.resolveVersionTimes(cxOrig.get()));
}
printf("Backup Description\n%s", desc.toString().c_str());
if(targetVersion == invalidVersion && desc.maxRestorableVersion.present())
targetVersion = desc.maxRestorableVersion.get();
Optional<RestorableFileSet> restoreSet = wait(bc->getRestoreSet(targetVersion));
if(!restoreSet.present()) {
TraceEvent(SevWarn, "FileBackupAgentRestoreNotPossible")
.detail("BackupContainer", bc->getURL())
.detail("TargetVersion", targetVersion);
fprintf(stderr, "ERROR: Restore version %" PRId64 " is not possible from %s\n", targetVersion, bc->getURL().c_str());
throw restore_invalid_version();
}
if (verbose) {
printf("Restoring backup to version: %lld\n", (long long) targetVersion);
}
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
wait(submitRestore(backupAgent, tr, tagName, url, ranges, targetVersion, addPrefix, removePrefix, lockDB, randomUid));
wait(tr->commit());
break;
} catch(Error &e) {
if(e.code() == error_code_restore_duplicate_tag) {
throw;
}
wait(tr->onError(e));
}
}
if(waitForComplete) {
ERestoreState finalState = wait(waitRestore(cx, tagName, verbose));
if(finalState != ERestoreState::COMPLETED)
throw restore_error();
}
return targetVersion;
}
//used for correctness only, locks the database before discontinuing the backup and that same lock is then used while doing the restore.
//the tagname of the backup must be the same as the restore.
ACTOR static Future<Version> atomicRestore(FileBackupAgent* backupAgent, Database cx, Key tagName,
Standalone<VectorRef<KeyRangeRef>> ranges, Key addPrefix,
Key removePrefix, bool fastRestore) {
state Reference<ReadYourWritesTransaction> ryw_tr = Reference<ReadYourWritesTransaction>(new ReadYourWritesTransaction(cx));
state BackupConfig backupConfig;
loop {
try {
ryw_tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
ryw_tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state KeyBackedTag tag = makeBackupTag(tagName.toString());
UidAndAbortedFlagT uidFlag = wait(tag.getOrThrow(ryw_tr));
backupConfig = BackupConfig(uidFlag.first);
state EBackupState status = wait(backupConfig.stateEnum().getOrThrow(ryw_tr));
if (status != BackupAgentBase::STATE_RUNNING_DIFFERENTIAL ) {
throw backup_duplicate();
}
break;
} catch( Error &e ) {
wait( ryw_tr->onError(e) );
}
}
//Lock src, record commit version
state Transaction tr(cx);
state Version commitVersion;
state UID randomUid = deterministicRandom()->randomUniqueID();
loop {
try {
// We must get a commit version so add a conflict range that won't likely cause conflicts
// but will ensure that the transaction is actually submitted.
tr.addWriteConflictRange(backupConfig.snapshotRangeDispatchMap().space.range());
wait( lockDatabase(&tr, randomUid) );
wait(tr.commit());
commitVersion = tr.getCommittedVersion();
TraceEvent("AS_Locked").detail("CommitVer", commitVersion);
break;
} catch( Error &e ) {
wait(tr.onError(e));
}
}
ryw_tr->reset();
loop {
try {
Optional<Version> restoreVersion = wait( backupConfig.getLatestRestorableVersion(ryw_tr) );
if(restoreVersion.present() && restoreVersion.get() >= commitVersion) {
TraceEvent("AS_RestoreVersion").detail("RestoreVer", restoreVersion.get());
break;
} else {
ryw_tr->reset();
wait(delay(0.2));
}
} catch( Error &e ) {
wait( ryw_tr->onError(e) );
}
}
ryw_tr->reset();
loop {
try {
wait( discontinueBackup(backupAgent, ryw_tr, tagName) );
wait( ryw_tr->commit() );
TraceEvent("AS_DiscontinuedBackup");
break;
} catch( Error &e ) {
if(e.code() == error_code_backup_unneeded || e.code() == error_code_backup_duplicate){
break;
}
wait( ryw_tr->onError(e) );
}
}
wait(success( waitBackup(backupAgent, cx, tagName.toString(), true) ));
TraceEvent("AS_BackupStopped");
ryw_tr->reset();
loop {
try {
ryw_tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
ryw_tr->setOption(FDBTransactionOptions::LOCK_AWARE);
for (auto &range : ranges) {
ryw_tr->addReadConflictRange(range);
ryw_tr->clear(range);
}
wait( ryw_tr->commit() );
TraceEvent("AS_ClearedRange");
break;
} catch( Error &e ) {
wait( ryw_tr->onError(e) );
}
}
Reference<IBackupContainer> bc = wait(backupConfig.backupContainer().getOrThrow(cx));
if (fastRestore) {
TraceEvent("AtomicParallelRestoreStartRestore");
Version targetVersion = -1;
bool lockDB = true;
wait(submitParallelRestore(cx, tagName, ranges, KeyRef(bc->getURL()), targetVersion, lockDB, randomUid));
TraceEvent("AtomicParallelRestoreWaitForRestoreFinish");
wait(parallelRestoreFinish(cx, randomUid));
return -1;
} else {
TraceEvent("AS_StartRestore");
Version ver = wait(restore(backupAgent, cx, cx, tagName, KeyRef(bc->getURL()), ranges, true, -1, true,
addPrefix, removePrefix, true, randomUid));
return ver;
}
}
// Similar to atomicRestore, only used in simulation test.
// locks the database before discontinuing the backup and that same lock is then used while doing the restore.
// the tagname of the backup must be the same as the restore.
static Future<Void> atomicParallelRestore(FileBackupAgent* backupAgent, Database cx, Key tagName,
Standalone<VectorRef<KeyRangeRef>> ranges, Key addPrefix,
Key removePrefix) {
return success(atomicRestore(backupAgent, cx, tagName, ranges, addPrefix, removePrefix, true));
}
};
const std::string BackupAgentBase::defaultTagName = "default";
const int BackupAgentBase::logHeaderSize = 12;
const int FileBackupAgent::dataFooterSize = 20;
// Return if parallel restore has finished
Future<Void> FileBackupAgent::parallelRestoreFinish(Database cx, UID randomUID) {
return FileBackupAgentImpl::parallelRestoreFinish(cx, randomUID);
}
Future<Void> FileBackupAgent::submitParallelRestore(Database cx, Key backupTag,
Standalone<VectorRef<KeyRangeRef>> backupRanges, Key bcUrl,
Version targetVersion, bool lockDB, UID randomUID) {
return FileBackupAgentImpl::submitParallelRestore(cx, backupTag, backupRanges, bcUrl, targetVersion, lockDB,
randomUID);
}
Future<Void> FileBackupAgent::atomicParallelRestore(Database cx, Key tagName, Standalone<VectorRef<KeyRangeRef>> ranges,
Key addPrefix, Key removePrefix) {
return FileBackupAgentImpl::atomicParallelRestore(this, cx, tagName, ranges, addPrefix, removePrefix);
}
Future<Version> FileBackupAgent::restore(Database cx, Optional<Database> cxOrig, Key tagName, Key url, Standalone<VectorRef<KeyRangeRef>> ranges, bool waitForComplete, Version targetVersion, bool verbose, Key addPrefix, Key removePrefix, bool lockDB) {
return FileBackupAgentImpl::restore(this, cx, cxOrig, tagName, url, ranges, waitForComplete, targetVersion, verbose, addPrefix, removePrefix, lockDB, deterministicRandom()->randomUniqueID());
}
Future<Version> FileBackupAgent::atomicRestore(Database cx, Key tagName, Standalone<VectorRef<KeyRangeRef>> ranges, Key addPrefix, Key removePrefix) {
return FileBackupAgentImpl::atomicRestore(this, cx, tagName, ranges, addPrefix, removePrefix, false);
}
Future<ERestoreState> FileBackupAgent::abortRestore(Reference<ReadYourWritesTransaction> tr, Key tagName) {
return fileBackup::abortRestore(tr, tagName);
}
Future<ERestoreState> FileBackupAgent::abortRestore(Database cx, Key tagName) {
return fileBackup::abortRestore(cx, tagName);
}
Future<std::string> FileBackupAgent::restoreStatus(Reference<ReadYourWritesTransaction> tr, Key tagName) {
return fileBackup::restoreStatus(tr, tagName);
}
Future<ERestoreState> FileBackupAgent::waitRestore(Database cx, Key tagName, bool verbose) {
return FileBackupAgentImpl::waitRestore(cx, tagName, verbose);
};
Future<Void> FileBackupAgent::submitBackup(Reference<ReadYourWritesTransaction> tr, Key outContainer,
int snapshotIntervalSeconds, std::string tagName,
Standalone<VectorRef<KeyRangeRef>> backupRanges, bool stopWhenDone,
bool partitionedLog) {
return FileBackupAgentImpl::submitBackup(this, tr, outContainer, snapshotIntervalSeconds, tagName, backupRanges,
stopWhenDone, partitionedLog);
}
Future<Void> FileBackupAgent::discontinueBackup(Reference<ReadYourWritesTransaction> tr, Key tagName){
return FileBackupAgentImpl::discontinueBackup(this, tr, tagName);
}
Future<Void> FileBackupAgent::abortBackup(Reference<ReadYourWritesTransaction> tr, std::string tagName){
return FileBackupAgentImpl::abortBackup(this, tr, tagName);
}
Future<std::string> FileBackupAgent::getStatus(Database cx, bool showErrors, std::string tagName) {
return FileBackupAgentImpl::getStatus(this, cx, showErrors, tagName);
}
Future<std::string> FileBackupAgent::getStatusJSON(Database cx, std::string tagName) {
return FileBackupAgentImpl::getStatusJSON(this, cx, tagName);
}
Future<Version> FileBackupAgent::getLastRestorable(Reference<ReadYourWritesTransaction> tr, Key tagName, bool snapshot) {
return FileBackupAgentImpl::getLastRestorable(this, tr, tagName, snapshot);
}
void FileBackupAgent::setLastRestorable(Reference<ReadYourWritesTransaction> tr, Key tagName, Version version) {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
tr->set(lastRestorable.pack(tagName), BinaryWriter::toValue<Version>(version, Unversioned()));
}
Future<int> FileBackupAgent::waitBackup(Database cx, std::string tagName, bool stopWhenDone, Reference<IBackupContainer> *pContainer, UID *pUID) {
return FileBackupAgentImpl::waitBackup(this, cx, tagName, stopWhenDone, pContainer, pUID);
}
Future<Void> FileBackupAgent::changePause(Database db, bool pause) {
return FileBackupAgentImpl::changePause(this, db, pause);
}