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foundationdb/fdbclient/DatabaseConfiguration.cpp

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/*
* DatabaseConfiguration.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 "DatabaseConfiguration.h"
#include "fdbclient/SystemData.h"
DatabaseConfiguration::DatabaseConfiguration()
{
resetInternal();
}
void DatabaseConfiguration::resetInternal() {
// does NOT reset rawConfiguration
initialized = false;
masterProxyCount = resolverCount = desiredTLogCount = tLogWriteAntiQuorum = tLogReplicationFactor = storageTeamSize = desiredLogRouterCount = -1;
tLogDataStoreType = storageServerStoreType = KeyValueStoreType::END;
autoMasterProxyCount = CLIENT_KNOBS->DEFAULT_AUTO_PROXIES;
autoResolverCount = CLIENT_KNOBS->DEFAULT_AUTO_RESOLVERS;
autoDesiredTLogCount = CLIENT_KNOBS->DEFAULT_AUTO_LOGS;
usableRegions = 1;
regions.clear();
tLogPolicy = storagePolicy = remoteTLogPolicy = IRepPolicyRef();
remoteDesiredTLogCount = -1;
remoteTLogReplicationFactor = repopulateRegionAntiQuorum = 0;
}
void parse( int* i, ValueRef const& v ) {
// FIXME: Sanity checking
*i = atoi(v.toString().c_str());
}
void parseReplicationPolicy(IRepPolicyRef* policy, ValueRef const& v) {
BinaryReader reader(v, IncludeVersion());
serializeReplicationPolicy(reader, *policy);
}
void parse( std::vector<RegionInfo>* regions, ValueRef const& v ) {
try {
StatusObject statusObj = BinaryReader::fromStringRef<StatusObject>(v, IncludeVersion());
StatusArray regionArray = statusObj["regions"].get_array();
regions->clear();
for (StatusObjectReader dc : regionArray) {
RegionInfo info;
json_spirit::mArray datacenters;
dc.get("datacenters", datacenters);
bool nonSatelliteDatacenters = 0;
for (StatusObjectReader s : datacenters) {
std::string idStr;
if (s.has("satellite") && s.last().get_int() == 1) {
SatelliteInfo satInfo;
s.get("id", idStr);
satInfo.dcId = idStr;
s.get("priority", satInfo.priority);
info.satellites.push_back(satInfo);
} else {
if (nonSatelliteDatacenters > 0) throw invalid_option();
nonSatelliteDatacenters++;
s.get("id", idStr);
info.dcId = idStr;
s.get("priority", info.priority);
}
}
std::sort(info.satellites.begin(), info.satellites.end(), SatelliteInfo::sort_by_priority() );
if (nonSatelliteDatacenters != 1) throw invalid_option();
dc.tryGet("satellite_logs", info.satelliteDesiredTLogCount);
std::string satelliteReplication;
if(dc.tryGet("satellite_redundancy_mode", satelliteReplication)) {
if(satelliteReplication == "one_satellite_single") {
info.satelliteTLogReplicationFactor = 1;
info.satelliteTLogUsableDcs = 1;
info.satelliteTLogWriteAntiQuorum = 0;
info.satelliteTLogPolicy = IRepPolicyRef(new PolicyOne());
} else if(satelliteReplication == "one_satellite_double") {
info.satelliteTLogReplicationFactor = 2;
info.satelliteTLogUsableDcs = 1;
info.satelliteTLogWriteAntiQuorum = 0;
info.satelliteTLogPolicy = IRepPolicyRef(new PolicyAcross(2, "zoneid", IRepPolicyRef(new PolicyOne())));
} else if(satelliteReplication == "one_satellite_triple") {
info.satelliteTLogReplicationFactor = 3;
info.satelliteTLogUsableDcs = 1;
info.satelliteTLogWriteAntiQuorum = 0;
info.satelliteTLogPolicy = IRepPolicyRef(new PolicyAcross(3, "zoneid", IRepPolicyRef(new PolicyOne())));
} else if(satelliteReplication == "two_satellite_safe") {
info.satelliteTLogReplicationFactor = 4;
info.satelliteTLogUsableDcs = 2;
info.satelliteTLogWriteAntiQuorum = 0;
info.satelliteTLogPolicy = IRepPolicyRef(new PolicyAcross(2, "dcid", IRepPolicyRef(new PolicyAcross(2, "zoneid", IRepPolicyRef(new PolicyOne())))));
info.satelliteTLogReplicationFactorFallback = 2;
info.satelliteTLogUsableDcsFallback = 1;
info.satelliteTLogWriteAntiQuorumFallback = 0;
info.satelliteTLogPolicyFallback = IRepPolicyRef(new PolicyAcross(2, "zoneid", IRepPolicyRef(new PolicyOne())));
} else if(satelliteReplication == "two_satellite_fast") {
info.satelliteTLogReplicationFactor = 4;
info.satelliteTLogUsableDcs = 2;
info.satelliteTLogWriteAntiQuorum = 2;
info.satelliteTLogPolicy = IRepPolicyRef(new PolicyAcross(2, "dcid", IRepPolicyRef(new PolicyAcross(2, "zoneid", IRepPolicyRef(new PolicyOne())))));
info.satelliteTLogReplicationFactorFallback = 2;
info.satelliteTLogUsableDcsFallback = 1;
info.satelliteTLogWriteAntiQuorumFallback = 0;
info.satelliteTLogPolicyFallback = IRepPolicyRef(new PolicyAcross(2, "zoneid", IRepPolicyRef(new PolicyOne())));
} else {
throw invalid_option();
}
}
dc.tryGet("satellite_log_replicas", info.satelliteTLogReplicationFactor);
dc.tryGet("satellite_usable_dcs", info.satelliteTLogUsableDcs);
dc.tryGet("satellite_anti_quorum", info.satelliteTLogWriteAntiQuorum);
dc.tryGet("satellite_log_replicas_fallback", info.satelliteTLogReplicationFactorFallback);
dc.tryGet("satellite_usable_dcs_fallback", info.satelliteTLogUsableDcsFallback);
dc.tryGet("satellite_anti_quorum_fallback", info.satelliteTLogWriteAntiQuorumFallback);
regions->push_back(info);
}
std::sort(regions->begin(), regions->end(), RegionInfo::sort_by_priority() );
} catch( Error &e ) {
regions->clear();
return;
}
}
void DatabaseConfiguration::setDefaultReplicationPolicy() {
if(!storagePolicy) {
storagePolicy = IRepPolicyRef(new PolicyAcross(storageTeamSize, "zoneid", IRepPolicyRef(new PolicyOne())));
}
if(!tLogPolicy) {
tLogPolicy = IRepPolicyRef(new PolicyAcross(tLogReplicationFactor, "zoneid", IRepPolicyRef(new PolicyOne())));
}
if(remoteTLogReplicationFactor > 0 && !remoteTLogPolicy) {
remoteTLogPolicy = IRepPolicyRef(new PolicyAcross(remoteTLogReplicationFactor, "zoneid", IRepPolicyRef(new PolicyOne())));
}
for(auto& r : regions) {
if(r.satelliteTLogReplicationFactor > 0 && !r.satelliteTLogPolicy) {
r.satelliteTLogPolicy = IRepPolicyRef(new PolicyAcross(r.satelliteTLogReplicationFactor, "zoneid", IRepPolicyRef(new PolicyOne())));
}
if(r.satelliteTLogReplicationFactorFallback > 0 && !r.satelliteTLogPolicyFallback) {
r.satelliteTLogPolicyFallback = IRepPolicyRef(new PolicyAcross(r.satelliteTLogReplicationFactorFallback, "zoneid", IRepPolicyRef(new PolicyOne())));
}
}
}
bool DatabaseConfiguration::isValid() const {
if( !(initialized &&
tLogWriteAntiQuorum >= 0 &&
tLogReplicationFactor >= 1 &&
storageTeamSize >= 1 &&
getDesiredProxies() >= 1 &&
getDesiredLogs() >= 1 &&
getDesiredResolvers() >= 1 &&
tLogDataStoreType != KeyValueStoreType::END &&
storageServerStoreType != KeyValueStoreType::END &&
autoMasterProxyCount >= 1 &&
autoResolverCount >= 1 &&
autoDesiredTLogCount >= 1 &&
storagePolicy &&
tLogPolicy &&
getDesiredRemoteLogs() >= 1 &&
remoteTLogReplicationFactor >= 0 &&
repopulateRegionAntiQuorum >= 0 &&
repopulateRegionAntiQuorum <= 1 &&
usableRegions >= 1 &&
usableRegions <= 2 &&
regions.size() <= 2 &&
( usableRegions == 1 || regions.size() == 2 ) &&
( regions.size() == 0 || regions[0].priority >= 0 ) &&
( regions.size() == 0 || tLogPolicy->info() != "dcid^2 x zoneid^2 x 1") ) ) { //We cannot specify regions with three_datacenter replication
return false;
}
std::set<Key> dcIds;
dcIds.insert(Key());
for(auto& r : regions) {
if( !(!dcIds.count(r.dcId) &&
r.satelliteTLogReplicationFactor >= 0 &&
r.satelliteTLogWriteAntiQuorum >= 0 &&
r.satelliteTLogUsableDcs >= 1 &&
( r.satelliteTLogReplicationFactor == 0 || ( r.satelliteTLogPolicy && r.satellites.size() ) ) &&
( r.satelliteTLogUsableDcsFallback == 0 || ( r.satelliteTLogReplicationFactor > 0 && r.satelliteTLogReplicationFactorFallback > 0 ) ) ) ) {
return false;
}
dcIds.insert(r.dcId);
for(auto& s : r.satellites) {
if(dcIds.count(s.dcId)) {
return false;
}
dcIds.insert(s.dcId);
}
}
return true;
}
StatusObject DatabaseConfiguration::toJSON(bool noPolicies) const {
StatusObject result;
if( initialized ) {
std::string tlogInfo = tLogPolicy->info();
std::string storageInfo = storagePolicy->info();
bool customRedundancy = false;
if( tLogWriteAntiQuorum == 0 ) {
if( tLogReplicationFactor == 1 && storageTeamSize == 1 ) {
result["redundancy_mode"] = "single";
} else if( tLogReplicationFactor == 2 && storageTeamSize == 2 ) {
result["redundancy_mode"] = "double";
} else if( tLogReplicationFactor == 4 && storageTeamSize == 6 && tlogInfo == "dcid^2 x zoneid^2 x 1" && storageInfo == "dcid^3 x zoneid^2 x 1" ) {
result["redundancy_mode"] = "three_datacenter";
} else if( tLogReplicationFactor == 4 && storageTeamSize == 4 && tlogInfo == "dcid^2 x zoneid^2 x 1" && storageInfo == "dcid^2 x zoneid^2 x 1" ) {
result["redundancy_mode"] = "three_datacenter_fallback";
} else if( tLogReplicationFactor == 3 && storageTeamSize == 3 ) {
result["redundancy_mode"] = "triple";
} else if( tLogReplicationFactor == 4 && storageTeamSize == 3 && tlogInfo == "data_hall^2 x zoneid^2 x 1" && storageInfo == "data_hall^3 x 1" ) {
result["redundancy_mode"] = "three_data_hall";
} else {
customRedundancy = true;
}
} else {
customRedundancy = true;
}
if(customRedundancy) {
result["storage_replicas"] = storageTeamSize;
result["log_replicas"] = tLogReplicationFactor;
result["log_anti_quorum"] = tLogWriteAntiQuorum;
if(!noPolicies) result["storage_replication_policy"] = storagePolicy->info();
if(!noPolicies) result["log_replication_policy"] = tLogPolicy->info();
}
if( tLogDataStoreType == KeyValueStoreType::SSD_BTREE_V1 && storageServerStoreType == KeyValueStoreType::SSD_BTREE_V1) {
result["storage_engine"] = "ssd-1";
} else if (tLogDataStoreType == KeyValueStoreType::SSD_BTREE_V2 && storageServerStoreType == KeyValueStoreType::SSD_BTREE_V2) {
result["storage_engine"] = "ssd-2";
} else if( tLogDataStoreType == KeyValueStoreType::MEMORY && storageServerStoreType == KeyValueStoreType::MEMORY ) {
result["storage_engine"] = "memory";
}
if( remoteTLogReplicationFactor == 1 ) {
result["remote_redundancy_mode"] = "remote_single";
} else if( remoteTLogReplicationFactor == 2 ) {
result["remote_redundancy_mode"] = "remote_double";
} else if( remoteTLogReplicationFactor == 3 ) {
result["remote_redundancy_mode"] = "remote_triple";
} else if( remoteTLogReplicationFactor > 3 ) {
result["remote_log_replicas"] = remoteTLogReplicationFactor;
if(noPolicies && remoteTLogPolicy) result["remote_log_policy"] = remoteTLogPolicy->info();
}
result["usable_regions"] = usableRegions;
if(regions.size()) {
StatusArray regionArr;
for(auto& r : regions) {
StatusObject regionObj;
StatusArray dcArr;
StatusObject dcObj;
dcObj["id"] = r.dcId.toString();
dcObj["priority"] = r.priority;
dcArr.push_back(dcObj);
if(r.satelliteTLogReplicationFactor == 1 && r.satelliteTLogUsableDcs == 1 && r.satelliteTLogWriteAntiQuorum == 0 && r.satelliteTLogUsableDcsFallback == 0) {
regionObj["satellite_redundancy_mode"] = "one_satellite_single";
} else if(r.satelliteTLogReplicationFactor == 2 && r.satelliteTLogUsableDcs == 1 && r.satelliteTLogWriteAntiQuorum == 0 && r.satelliteTLogUsableDcsFallback == 0) {
regionObj["satellite_redundancy_mode"] = "one_satellite_double";
} else if(r.satelliteTLogReplicationFactor == 3 && r.satelliteTLogUsableDcs == 1 && r.satelliteTLogWriteAntiQuorum == 0 && r.satelliteTLogUsableDcsFallback == 0) {
regionObj["satellite_redundancy_mode"] = "one_satellite_triple";
} else if(r.satelliteTLogReplicationFactor == 4 && r.satelliteTLogUsableDcs == 2 && r.satelliteTLogWriteAntiQuorum == 0 && r.satelliteTLogUsableDcsFallback == 1 && r.satelliteTLogReplicationFactorFallback == 2 && r.satelliteTLogWriteAntiQuorumFallback == 0) {
regionObj["satellite_redundancy_mode"] = "two_satellite_safe";
} else if(r.satelliteTLogReplicationFactor == 4 && r.satelliteTLogUsableDcs == 2 && r.satelliteTLogWriteAntiQuorum == 2 && r.satelliteTLogUsableDcsFallback == 1 && r.satelliteTLogReplicationFactorFallback == 2 && r.satelliteTLogWriteAntiQuorumFallback == 0) {
regionObj["satellite_redundancy_mode"] = "two_satellite_fast";
} else if(r.satelliteTLogReplicationFactor != 0) {
regionObj["satellite_log_replicas"] = r.satelliteTLogReplicationFactor;
regionObj["satellite_usable_dcs"] = r.satelliteTLogUsableDcs;
regionObj["satellite_anti_quorum"] = r.satelliteTLogWriteAntiQuorum;
if(r.satelliteTLogPolicy) regionObj["satellite_log_policy"] = r.satelliteTLogPolicy->info();
regionObj["satellite_log_replicas_fallback"] = r.satelliteTLogReplicationFactorFallback;
regionObj["satellite_usable_dcs_fallback"] = r.satelliteTLogUsableDcsFallback;
regionObj["satellite_anti_quorum_fallback"] = r.satelliteTLogWriteAntiQuorumFallback;
if(r.satelliteTLogPolicyFallback) regionObj["satellite_log_policy_fallback"] = r.satelliteTLogPolicyFallback->info();
}
if( r.satelliteDesiredTLogCount != -1 ) {
regionObj["satellite_logs"] = r.satelliteDesiredTLogCount;
}
if(r.satellites.size()) {
for(auto& s : r.satellites) {
StatusObject satObj;
satObj["id"] = s.dcId.toString();
satObj["priority"] = s.priority;
satObj["satellite"] = 1;
dcArr.push_back(satObj);
}
}
regionObj["datacenters"] = dcArr;
regionArr.push_back(regionObj);
}
result["regions"] = regionArr;
}
if( desiredTLogCount != -1 ) {
result["logs"] = desiredTLogCount;
}
if( masterProxyCount != -1 ) {
result["proxies"] = masterProxyCount;
}
if( resolverCount != -1 ) {
result["resolvers"] = resolverCount;
}
if( desiredLogRouterCount != -1 ) {
result["log_routers"] = desiredLogRouterCount;
}
if( remoteDesiredTLogCount != -1 ) {
result["remote_logs"] = remoteDesiredTLogCount;
}
if( repopulateRegionAntiQuorum != 0 ) {
result["repopulate_anti_quorum"] = repopulateRegionAntiQuorum;
}
if( autoMasterProxyCount != CLIENT_KNOBS->DEFAULT_AUTO_PROXIES ) {
result["auto_proxies"] = autoMasterProxyCount;
}
if (autoResolverCount != CLIENT_KNOBS->DEFAULT_AUTO_RESOLVERS) {
result["auto_resolvers"] = autoResolverCount;
}
if (autoDesiredTLogCount != CLIENT_KNOBS->DEFAULT_AUTO_LOGS) {
result["auto_logs"] = autoDesiredTLogCount;
}
}
return result;
}
std::string DatabaseConfiguration::toString() const {
return json_spirit::write_string(json_spirit::mValue(toJSON()), json_spirit::Output_options::none);
}
bool DatabaseConfiguration::setInternal(KeyRef key, ValueRef value) {
KeyRef ck = key.removePrefix( configKeysPrefix );
int type;
if (ck == LiteralStringRef("initialized")) initialized = true;
else if (ck == LiteralStringRef("proxies")) parse(&masterProxyCount, value);
else if (ck == LiteralStringRef("resolvers")) parse(&resolverCount, value);
else if (ck == LiteralStringRef("logs")) parse(&desiredTLogCount, value);
else if (ck == LiteralStringRef("log_replicas")) parse(&tLogReplicationFactor, value);
else if (ck == LiteralStringRef("log_anti_quorum")) parse(&tLogWriteAntiQuorum, value);
else if (ck == LiteralStringRef("storage_replicas")) parse(&storageTeamSize, value);
else if (ck == LiteralStringRef("log_engine")) { parse((&type), value); tLogDataStoreType = (KeyValueStoreType::StoreType)type; }
else if (ck == LiteralStringRef("storage_engine")) { parse((&type), value); storageServerStoreType = (KeyValueStoreType::StoreType)type; }
else if (ck == LiteralStringRef("auto_proxies")) parse(&autoMasterProxyCount, value);
else if (ck == LiteralStringRef("auto_resolvers")) parse(&autoResolverCount, value);
else if (ck == LiteralStringRef("auto_logs")) parse(&autoDesiredTLogCount, value);
else if (ck == LiteralStringRef("storage_replication_policy")) parseReplicationPolicy(&storagePolicy, value);
else if (ck == LiteralStringRef("log_replication_policy")) parseReplicationPolicy(&tLogPolicy, value);
else if (ck == LiteralStringRef("log_routers")) parse(&desiredLogRouterCount, value);
else if (ck == LiteralStringRef("remote_logs")) parse(&remoteDesiredTLogCount, value);
else if (ck == LiteralStringRef("remote_log_replicas")) parse(&remoteTLogReplicationFactor, value);
else if (ck == LiteralStringRef("remote_log_policy")) parseReplicationPolicy(&remoteTLogPolicy, value);
else if (ck == LiteralStringRef("usable_regions")) parse(&usableRegions, value);
else if (ck == LiteralStringRef("repopulate_anti_quorum")) parse(&repopulateRegionAntiQuorum, value);
else if (ck == LiteralStringRef("regions")) parse(&regions, value);
else return false;
return true; // All of the above options currently require recovery to take effect
}
inline static KeyValueRef * lower_bound( VectorRef<KeyValueRef> & config, KeyRef const& key ) {
return std::lower_bound( config.begin(), config.end(), KeyValueRef(key, ValueRef()), KeyValueRef::OrderByKey() );
}
inline static KeyValueRef const* lower_bound( VectorRef<KeyValueRef> const& config, KeyRef const& key ) {
return lower_bound( const_cast<VectorRef<KeyValueRef> &>(config), key );
}
void DatabaseConfiguration::applyMutation( MutationRef m ) {
if( m.type == MutationRef::SetValue && m.param1.startsWith(configKeysPrefix) ) {
set(m.param1, m.param2);
} else if( m.type == MutationRef::ClearRange ) {
KeyRangeRef range(m.param1, m.param2);
if( range.intersects( configKeys ) ) {
clear(range & configKeys);
}
}
}
bool DatabaseConfiguration::set(KeyRef key, ValueRef value) {
makeConfigurationMutable();
mutableConfiguration.get()[ key.toString() ] = value.toString();
return setInternal(key,value);
}
bool DatabaseConfiguration::clear( KeyRangeRef keys ) {
makeConfigurationMutable();
auto& mc = mutableConfiguration.get();
mc.erase( mc.lower_bound( keys.begin.toString() ), mc.lower_bound( keys.end.toString() ) );
// FIXME: More efficient
bool wasValid = isValid();
resetInternal();
for(auto c = mc.begin(); c != mc.end(); ++c)
setInternal(c->first, c->second);
return wasValid && !isValid();
}
Optional<ValueRef> DatabaseConfiguration::get( KeyRef key ) const {
if (mutableConfiguration.present()) {
auto i = mutableConfiguration.get().find(key.toString());
if (i == mutableConfiguration.get().end()) return Optional<ValueRef>();
return ValueRef(i->second);
} else {
auto i = lower_bound(rawConfiguration, key);
if (i == rawConfiguration.end() || i->key != key) return Optional<ValueRef>();
return i->value;
}
}
bool DatabaseConfiguration::isExcludedServer( NetworkAddress a ) const {
return get( encodeExcludedServersKey( AddressExclusion(a.ip, a.port) ) ).present() ||
get( encodeExcludedServersKey( AddressExclusion(a.ip) ) ).present();
}
std::set<AddressExclusion> DatabaseConfiguration::getExcludedServers() const {
const_cast<DatabaseConfiguration*>(this)->makeConfigurationImmutable();
std::set<AddressExclusion> addrs;
for( auto i = lower_bound(rawConfiguration, excludedServersKeys.begin); i != rawConfiguration.end() && i->key < excludedServersKeys.end; ++i ) {
AddressExclusion a = decodeExcludedServersKey( i->key );
if (a.isValid()) addrs.insert(a);
}
return addrs;
}
void DatabaseConfiguration::makeConfigurationMutable() {
if (mutableConfiguration.present()) return;
mutableConfiguration = std::map<std::string,std::string>();
auto& mc = mutableConfiguration.get();
for(auto r = rawConfiguration.begin(); r != rawConfiguration.end(); ++r)
mc[ r->key.toString() ] = r->value.toString();
rawConfiguration = Standalone<VectorRef<KeyValueRef>>();
}
void DatabaseConfiguration::makeConfigurationImmutable() {
if (!mutableConfiguration.present()) return;
auto & mc = mutableConfiguration.get();
rawConfiguration = Standalone<VectorRef<KeyValueRef>>();
rawConfiguration.resize( rawConfiguration.arena(), mc.size() );
int i = 0;
for(auto r = mc.begin(); r != mc.end(); ++r)
rawConfiguration[i++] = KeyValueRef( rawConfiguration.arena(), KeyValueRef( r->first, r->second ) );
mutableConfiguration = Optional<std::map<std::string,std::string>>();
}
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