224 lines
9.2 KiB
C++
224 lines
9.2 KiB
C++
/*
|
|
* SystemData.h
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef FDBCLIENT_SYSTEMDATA_H
|
|
#define FDBCLIENT_SYSTEMDATA_H
|
|
#pragma once
|
|
|
|
// Functions and constants documenting the organization of the reserved keyspace in the database beginning with "\xFF"
|
|
|
|
#include "FDBTypes.h"
|
|
#include "StorageServerInterface.h"
|
|
|
|
extern const KeyRangeRef normalKeys; // '' to systemKeys.begin
|
|
extern const KeyRangeRef systemKeys; // [FF] to [FF][FF]
|
|
extern const KeyRangeRef nonMetadataSystemKeys; // [FF][00] to [FF][01]
|
|
extern const KeyRangeRef allKeys; // '' to systemKeys.end
|
|
extern const KeyRef afterAllKeys;
|
|
|
|
// "\xff/keyServers/[[begin]]" := "[[vector<serverID>, vector<serverID>]]"
|
|
extern const KeyRangeRef keyServersKeys, keyServersKeyServersKeys;
|
|
extern const KeyRef keyServersPrefix, keyServersEnd, keyServersKeyServersKey;
|
|
const Key keyServersKey( const KeyRef& k );
|
|
const KeyRef keyServersKey( const KeyRef& k, Arena& arena );
|
|
const Value keyServersValue(
|
|
const vector<UID>& src,
|
|
const vector<UID>& dest = vector<UID>() );
|
|
void decodeKeyServersValue( const ValueRef& value,
|
|
vector<UID>& src, vector<UID>& dest );
|
|
|
|
// "\xff/serverKeys/[[serverID]]/[[begin]]" := "" | "1" | "2"
|
|
extern const KeyRef serverKeysPrefix;
|
|
extern const ValueRef serverKeysTrue, serverKeysFalse;
|
|
const Key serverKeysKey( UID serverID, const KeyRef& keys );
|
|
const Key serverKeysPrefixFor( UID serverID );
|
|
UID serverKeysDecodeServer( const KeyRef& key );
|
|
bool serverHasKey( ValueRef storedValue );
|
|
|
|
extern const KeyRangeRef serverTagKeys;
|
|
extern const KeyRef serverTagPrefix;
|
|
extern const KeyRef serverTagMaxKey;
|
|
extern const KeyRangeRef serverTagConflictKeys;
|
|
extern const KeyRef serverTagConflictPrefix;
|
|
|
|
const Key serverTagKeyFor( UID serverID );
|
|
const Value serverTagValue( Tag );
|
|
UID decodeServerTagKey( KeyRef const& );
|
|
Tag decodeServerTagValue( ValueRef const& );
|
|
const Key serverTagConflictKeyFor( Tag );
|
|
const Value serverTagMaxValue( Tag );
|
|
Tag decodeServerTagMaxValue( ValueRef const& );
|
|
|
|
// "\xff/serverList/[[serverID]]" := "[[StorageServerInterface]]"
|
|
// Storage servers are listed here when they are recruited - always before assigning them keys
|
|
// Storage servers removed from here are never replaced. The same fdbserver, if re-recruited, will always
|
|
// have a new ID. When removed from here, a storage server may release all resources and destroy itself.
|
|
extern const KeyRangeRef serverListKeys;
|
|
extern const KeyRef serverListPrefix;
|
|
const Key serverListKeyFor( UID serverID );
|
|
const Value serverListValue( StorageServerInterface const& );
|
|
UID decodeServerListKey( KeyRef const& );
|
|
StorageServerInterface decodeServerListValue( ValueRef const& );
|
|
|
|
// "\xff/processClass/[[processID]]" := "[[ProcessClass]]"
|
|
// Contains a mapping from processID to processClass
|
|
extern const KeyRangeRef processClassKeys;
|
|
extern const KeyRef processClassPrefix;
|
|
extern const KeyRef processClassChangeKey;
|
|
extern const KeyRef processClassVersionKey;
|
|
extern const ValueRef processClassVersionValue;
|
|
const Key processClassKeyFor(StringRef processID );
|
|
const Value processClassValue( ProcessClass const& );
|
|
Key decodeProcessClassKey( KeyRef const& );
|
|
ProcessClass decodeProcessClassValue( ValueRef const& );
|
|
UID decodeProcessClassKeyOld( KeyRef const& key );
|
|
|
|
// "\xff/conf/[[option]]" := "value"
|
|
extern const KeyRangeRef configKeys;
|
|
extern const KeyRef configKeysPrefix;
|
|
|
|
// "\xff/conf/excluded/1.2.3.4" := ""
|
|
// "\xff/conf/excluded/1.2.3.4:4000" := ""
|
|
// These are inside configKeysPrefix since they represent a form of configuration and they are convenient
|
|
// to track in the same way by the tlog and recovery process, but they are ignored by the DatabaseConfiguration
|
|
// class.
|
|
extern const KeyRef excludedServersPrefix;
|
|
extern const KeyRangeRef excludedServersKeys;
|
|
extern const KeyRef excludedServersVersionKey; // The value of this key shall be changed by any transaction that modifies the excluded servers list
|
|
const AddressExclusion decodeExcludedServersKey( KeyRef const& key ); // where key.startsWith(excludedServersPrefix)
|
|
std::string encodeExcludedServersKey( AddressExclusion const& );
|
|
|
|
// "\xff/workers/[[processID]]" := ""
|
|
// Asynchronously updated by the cluster controller, this is a list of fdbserver processes that have joined the cluster
|
|
// and are currently (recently) available
|
|
extern const KeyRangeRef workerListKeys;
|
|
extern const KeyRef workerListPrefix;
|
|
const Key workerListKeyFor(StringRef processID );
|
|
const Value workerListValue( ProcessData const& );
|
|
Key decodeWorkerListKey( KeyRef const& );
|
|
ProcessData decodeWorkerListValue( ValueRef const& );
|
|
|
|
extern const KeyRef coordinatorsKey;
|
|
extern const KeyRef logsKey;
|
|
extern const KeyRef minRequiredCommitVersionKey;
|
|
|
|
const Value logsValue( const vector<std::pair<UID, NetworkAddress>>& logs, const vector<std::pair<UID, NetworkAddress>>& oldLogs );
|
|
std::pair<vector<std::pair<UID, NetworkAddress>>,vector<std::pair<UID, NetworkAddress>>> decodeLogsValue( const ValueRef& value );
|
|
|
|
// The "global keys" are send to each storage server any time they are changed
|
|
extern const KeyRef globalKeysPrefix;
|
|
extern const KeyRef lastEpochEndKey;
|
|
extern const KeyRef lastEpochEndPrivateKey;
|
|
extern const KeyRef fastLoggingEnabled;
|
|
extern const KeyRef fastLoggingEnabledPrivateKey;
|
|
|
|
extern const KeyRef moveKeysLockOwnerKey, moveKeysLockWriteKey;
|
|
|
|
extern const KeyRef dataDistributionModeKey;
|
|
extern const UID dataDistributionModeLock;
|
|
|
|
|
|
// Log Range constant variables
|
|
// \xff/logRanges/[16-byte UID][begin key] := serialize( make_pair([end key], [destination key prefix]), IncludeVersion() )
|
|
extern const KeyRangeRef logRangesRange;
|
|
|
|
// Returns the encoded key comprised of begin key and log uid
|
|
Key logRangesEncodeKey(KeyRef keyBegin, UID logUid);
|
|
|
|
// Returns the start key and optionally the logRange Uid
|
|
KeyRef logRangesDecodeKey(KeyRef key, UID* logUid = NULL);
|
|
|
|
// Returns the end key and optionally the key prefix
|
|
Key logRangesDecodeValue(KeyRef keyValue, Key* destKeyPrefix = NULL);
|
|
|
|
// Returns the encoded key value comprised of the end key and destination prefix
|
|
Key logRangesEncodeValue(KeyRef keyEnd, KeyRef destKeyPrefix);
|
|
|
|
// Returns a key prefixed with the specified key with
|
|
// the given uid encoded at the end
|
|
Key uidPrefixKey(KeyRef keyPrefix, UID logUid);
|
|
|
|
// Apply mutations constant variables
|
|
// \xff/applyMutationsEnd/[16-byte UID] := serialize( endVersion, Unversioned() )
|
|
extern const KeyRangeRef applyMutationsEndRange;
|
|
|
|
// \xff/applyMutationsBegin/[16-byte UID] := serialize( beginVersion, Unversioned() )
|
|
extern const KeyRangeRef applyMutationsBeginRange;
|
|
|
|
// \xff/applyMutationsAddPrefix/[16-byte UID] := addPrefix
|
|
extern const KeyRangeRef applyMutationsAddPrefixRange;
|
|
|
|
// \xff/applyMutationsRemovePrefix/[16-byte UID] := removePrefix
|
|
extern const KeyRangeRef applyMutationsRemovePrefixRange;
|
|
|
|
extern const KeyRangeRef applyMutationsKeyVersionMapRange;
|
|
extern const KeyRangeRef applyMutationsKeyVersionCountRange;
|
|
|
|
// FdbClient Info prefix
|
|
extern const KeyRangeRef fdbClientInfoPrefixRange;
|
|
extern const KeyRef fdbClientInfoTxnSampleRate;
|
|
extern const KeyRef fdbClientInfoTxnSizeLimit;
|
|
|
|
// Keyspace to maintain wall clock to version map
|
|
extern const KeyRangeRef timeKeeperPrefixRange;
|
|
extern const KeyRef timeKeeperVersionKey;
|
|
extern const KeyRef timeKeeperDisableKey;
|
|
|
|
// Layer status metadata prefix
|
|
extern const KeyRangeRef layerStatusMetaPrefixRange;
|
|
|
|
// Backup agent status root
|
|
extern const KeyRangeRef backupStatusPrefixRange;
|
|
|
|
// Key range reserved by file backup agent to storing configuration and state information
|
|
extern const KeyRangeRef fileBackupPrefixRange;
|
|
|
|
// Key range reserved by file restore agent (currently part of backup agent functionally separate) for storing configuration and state information
|
|
extern const KeyRangeRef fileRestorePrefixRange;
|
|
|
|
// Key range reserved by database backup agent to storing configuration and state information
|
|
extern const KeyRangeRef databaseBackupPrefixRange;
|
|
|
|
// Key range reserved by backup agent to storing mutations
|
|
extern const KeyRangeRef backupLogKeys;
|
|
extern const KeyRangeRef applyLogKeys;
|
|
|
|
extern const KeyRef backupVersionKey;
|
|
extern const ValueRef backupVersionValue;
|
|
extern const int backupVersion;
|
|
static const int backupLogPrefixBytes = 8;
|
|
|
|
// Use for legacy system support (pre 300)
|
|
extern const KeyRef backupEnabledKey;
|
|
|
|
extern const KeyRef systemTuplesPrefix;
|
|
extern const KeyRef metricConfChangeKey;
|
|
|
|
extern const KeyRangeRef metricConfKeys;
|
|
extern const KeyRef metricConfPrefix;
|
|
//const Key metricConfKey( KeyRef const& prefix, struct MetricNameRef const& name, KeyRef const& key );
|
|
//std::pair<struct MetricNameRef, KeyRef> decodeMetricConfKey( KeyRef const& prefix, KeyRef const& key );
|
|
|
|
extern const KeyRef maxUIDKey;
|
|
|
|
extern const KeyRef databaseLockedKey;
|
|
|
|
#endif
|