293 lines
10 KiB
C++
293 lines
10 KiB
C++
/*
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* Locality.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FLOW_LOCALITY_H
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#define FLOW_LOCALITY_H
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#pragma once
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#include "flow/flow.h"
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struct ProcessClass {
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// This enum is stored in restartInfo.ini for upgrade tests, so be very careful about changing the existing items!
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enum ClassType { UnsetClass, StorageClass, TransactionClass, ResolutionClass, TesterClass, ProxyClass, MasterClass, StatelessClass, LogClass, ClusterControllerClass, LogRouterClass, InvalidClass = -1 };
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enum Fitness { BestFit, GoodFit, UnsetFit, OkayFit, WorstFit, ExcludeFit, NeverAssign }; //cannot be larger than 7 because of leader election mask
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enum ClusterRole { Storage, TLog, Proxy, Master, Resolver, LogRouter, ClusterController };
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enum ClassSource { CommandLineSource, AutoSource, DBSource, InvalidSource = -1 };
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int16_t _class;
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int16_t _source;
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public:
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ProcessClass() : _class( UnsetClass ), _source( CommandLineSource ) {}
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ProcessClass( ClassType type, ClassSource source ) : _class( type ), _source( source ) {}
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explicit ProcessClass( std::string s, ClassSource source ) : _source( source ) {
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if (s=="storage") _class = StorageClass;
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else if (s=="transaction") _class = TransactionClass;
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else if (s=="resolution") _class = ResolutionClass;
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else if (s=="proxy") _class = ProxyClass;
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else if (s=="master") _class = MasterClass;
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else if (s=="test") _class = TesterClass;
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else if (s=="unset") _class = UnsetClass;
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else if (s=="stateless") _class = StatelessClass;
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else if (s=="log") _class = LogClass;
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else if (s=="router") _class = LogRouterClass;
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else if (s=="cluster_controller") _class = ClusterControllerClass;
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else _class = InvalidClass;
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}
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ProcessClass( std::string classStr, std::string sourceStr ) {
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if (classStr=="storage") _class = StorageClass;
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else if (classStr=="transaction") _class = TransactionClass;
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else if (classStr=="resolution") _class = ResolutionClass;
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else if (classStr=="proxy") _class = ProxyClass;
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else if (classStr=="master") _class = MasterClass;
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else if (classStr=="test") _class = TesterClass;
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else if (classStr=="unset") _class = UnsetClass;
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else if (classStr=="stateless") _class = StatelessClass;
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else if (classStr=="log") _class = LogClass;
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else if (classStr=="router") _class = LogRouterClass;
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else if (classStr=="cluster_controller") _class = ClusterControllerClass;
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else _class = InvalidClass;
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if (sourceStr=="command_line") _source = CommandLineSource;
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else if (sourceStr=="configure_auto") _source = AutoSource;
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else if (sourceStr=="set_class") _source = DBSource;
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else _source = InvalidSource;
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}
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ClassType classType() const { return (ClassType)_class; }
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ClassSource classSource() const { return (ClassSource)_source; }
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bool operator == ( const ClassType& rhs ) const { return _class == rhs; }
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bool operator != ( const ClassType& rhs ) const { return _class != rhs; }
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bool operator == ( const ProcessClass& rhs ) const { return _class == rhs._class && _source == rhs._source; }
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bool operator != ( const ProcessClass& rhs ) const { return _class != rhs._class || _source != rhs._source; }
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std::string toString() const {
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switch (_class) {
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case UnsetClass: return "unset";
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case StorageClass: return "storage";
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case TransactionClass: return "transaction";
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case ResolutionClass: return "resolution";
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case ProxyClass: return "proxy";
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case MasterClass: return "master";
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case TesterClass: return "test";
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case StatelessClass: return "stateless";
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case LogClass: return "log";
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case LogRouterClass: return "router";
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case ClusterControllerClass: return "cluster_controller";
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default: return "invalid";
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}
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}
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std::string sourceString() const {
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switch (_source) {
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case CommandLineSource: return "command_line";
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case AutoSource: return "configure_auto";
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case DBSource: return "set_class";
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default: return "invalid";
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}
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}
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Fitness machineClassFitness( ClusterRole role ) const ;
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template <class Ar>
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void serialize(Ar& ar) {
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ar & _class & _source;
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}
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};
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struct LocalityData {
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std::map<Standalone<StringRef>, Optional<Standalone<StringRef>>> _data;
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static const StringRef keyProcessId;
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static const StringRef keyZoneId;
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static const StringRef keyDcId;
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static const StringRef keyMachineId;
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static const StringRef keyDataHallId;
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public:
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LocalityData() {}
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LocalityData(Optional<Standalone<StringRef>> processID, Optional<Standalone<StringRef>> zoneID, Optional<Standalone<StringRef>> MachineID, Optional<Standalone<StringRef>> dcID ) {
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_data[keyProcessId] = processID;
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_data[keyZoneId] = zoneID;
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_data[keyMachineId] = MachineID;
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_data[keyDcId] = dcID;
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}
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bool operator == (LocalityData const& rhs) const {
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return ((_data.size() == rhs._data.size()) &&
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(std::equal(_data.begin(), _data.end(), rhs._data.begin())));
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}
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Optional<Standalone<StringRef>> get(StringRef key) const {
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auto pos = _data.find(key);
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return (pos == _data.end()) ? Optional<Standalone<StringRef>>() : pos->second;
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}
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void set(StringRef key, Optional<Standalone<StringRef>> value) {
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_data[key] = value;
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}
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bool isPresent(StringRef key) const { return (_data.find(key) != _data.end()); }
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bool isPresent(StringRef key, Optional<Standalone<StringRef>> value) const {
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auto pos = _data.find(key);
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return (pos != _data.end()) ? false : (pos->second == value);
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}
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std::string describeValue(StringRef key) const {
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auto value = get(key);
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return (value.present()) ? value.get().toString() : "[unset]";
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}
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std::string describeZone() const { return describeValue(keyZoneId); }
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std::string describeDataHall() const { return describeValue(keyDataHallId); }
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Optional<Standalone<StringRef>> processId() const { return get(keyProcessId); }
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Optional<Standalone<StringRef>> zoneId() const { return get(keyZoneId); }
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Optional<Standalone<StringRef>> machineId() const { return get(keyMachineId); }
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Optional<Standalone<StringRef>> dcId() const { return get(keyDcId); }
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Optional<Standalone<StringRef>> dataHallId() const { return get(keyDataHallId); }
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std::string toString() const {
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std::string infoString;
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for (auto it = _data.rbegin(); !(it == _data.rend()); ++it) {
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if (infoString.length()) { infoString += " "; }
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infoString += it->first.printable() + "=";
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infoString += (it->second.present()) ? it->second.get().printable() : "[unset]";
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}
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return infoString;
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}
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template <class Ar>
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void serialize(Ar& ar) {
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// Locality is persisted in the database inside StorageServerInterface, so changes here have to be
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// versioned carefully!
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if (ar.protocolVersion() >= 0x0FDB00A446020001LL) {
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Standalone<StringRef> key;
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Optional<Standalone<StringRef>> value;
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uint64_t mapSize = (uint64_t)_data.size();
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ar & mapSize;
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if (ar.isDeserializing) {
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for (size_t i = 0; i < mapSize; i++) {
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ar & key & value;
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_data[key] = value;
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}
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}
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else {
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for (auto it = _data.begin(); it != _data.end(); it++) {
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key = it->first;
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value = it->second;
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ar & key & value;
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}
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}
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}
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else {
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ASSERT(ar.isDeserializing);
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UID zoneId, dcId, processId;
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ar & zoneId & dcId;
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set(keyZoneId, Standalone<StringRef>(zoneId.toString()));
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set(keyDcId, Standalone<StringRef>(dcId.toString()));
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if (ar.protocolVersion() >= 0x0FDB00A340000001LL) {
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ar & processId;
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set(keyProcessId, Standalone<StringRef>(processId.toString()));
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}
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else {
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int _machineClass = ProcessClass::UnsetClass;
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ar & _machineClass;
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}
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}
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}
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static const UID UNSET_ID;
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};
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static std::string describe(
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std::vector<LocalityData> const& items,
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StringRef const key,
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int max_items = -1 )
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{
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if(!items.size())
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return "[no items]";
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std::string s;
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int count = 0;
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for(auto const& item : items) {
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if( ++count > max_items && max_items >= 0)
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break;
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if (count > 1) s += ",";
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s += item.describeValue(key);
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}
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return s;
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}
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static std::string describeZones( std::vector<LocalityData> const& items, int max_items = -1 ) {
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return describe(items, LocalityData::keyZoneId, max_items);
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}
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static std::string describeDataHalls( std::vector<LocalityData> const& items, int max_items = -1 ) {
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return describe(items, LocalityData::keyDataHallId, max_items);
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}
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struct ProcessData {
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LocalityData locality;
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ProcessClass processClass;
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NetworkAddress address;
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ProcessData() {}
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ProcessData( LocalityData locality, ProcessClass processClass, NetworkAddress address ) : locality(locality), processClass(processClass), address(address) {}
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template <class Ar>
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void serialize(Ar& ar) {
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ar & locality & processClass & address;
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}
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struct sort_by_address {
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bool operator ()(ProcessData const&a, ProcessData const& b) const { return a.address < b.address; }
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};
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};
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template <class Interface, class Enable = void>
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struct LBLocalityData {
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enum { Present = 0 };
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static LocalityData getLocality( Interface const& ) { return LocalityData(); }
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static NetworkAddress getAddress( Interface const& ) { return NetworkAddress(); }
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};
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// Template specialization that only works for interfaces with a .locality member.
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// If an interface has a .locality it must also have a .address()
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template <class Interface>
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struct LBLocalityData<Interface, typename std::enable_if< Interface::LocationAwareLoadBalance >::type> {
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enum { Present = 1 };
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static LocalityData getLocality( Interface const& i ) { return i.locality; }
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static NetworkAddress getAddress( Interface const& i ) { return i.address(); }
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};
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struct LBDistance {
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enum Type {
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SAME_MACHINE = 0,
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SAME_DC = 1,
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DISTANT = 2
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};
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};
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LBDistance::Type loadBalanceDistance( LocalityData const& localLoc, LocalityData const& otherLoc, NetworkAddress const& otherAddr );
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#endif
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