263 lines
9.8 KiB
C++
263 lines
9.8 KiB
C++
/*
|
|
* DataDistribution.actor.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.
|
|
*/
|
|
|
|
#if defined(NO_INTELLISENSE) && !defined(FDBSERVER_DATA_DISTRIBUTION_ACTOR_G_H)
|
|
#define FDBSERVER_DATA_DISTRIBUTION_ACTOR_G_H
|
|
#include "fdbserver/DataDistribution.actor.g.h"
|
|
#elif !defined(FDBSERVER_DATA_DISTRIBUTION_ACTOR_H)
|
|
#define FDBSERVER_DATA_DISTRIBUTION_ACTOR_H
|
|
|
|
#include "fdbclient/NativeAPI.actor.h"
|
|
#include "fdbserver/MoveKeys.actor.h"
|
|
#include "fdbserver/LogSystem.h"
|
|
#include "flow/actorcompiler.h" // This must be the last #include.
|
|
|
|
struct RelocateShard {
|
|
KeyRange keys;
|
|
int priority;
|
|
|
|
RelocateShard() : priority(0) {}
|
|
RelocateShard( KeyRange const& keys, int priority ) : keys(keys), priority(priority) {}
|
|
};
|
|
|
|
struct IDataDistributionTeam {
|
|
virtual vector<StorageServerInterface> getLastKnownServerInterfaces() const = 0;
|
|
virtual int size() const = 0;
|
|
virtual vector<UID> const& getServerIDs() const = 0;
|
|
virtual void addDataInFlightToTeam( int64_t delta ) = 0;
|
|
virtual int64_t getDataInFlightToTeam() const = 0;
|
|
virtual int64_t getLoadBytes(bool includeInFlight = true, double inflightPenalty = 1.0) const = 0;
|
|
virtual int64_t getMinAvailableSpace(bool includeInFlight = true) const = 0;
|
|
virtual double getMinAvailableSpaceRatio(bool includeInFlight = true) const = 0;
|
|
virtual bool hasHealthyAvailableSpace(double minRatio) const = 0;
|
|
virtual Future<Void> updateStorageMetrics() = 0;
|
|
virtual void addref() = 0;
|
|
virtual void delref() = 0;
|
|
virtual bool isHealthy() const = 0;
|
|
virtual void setHealthy(bool) = 0;
|
|
virtual int getPriority() const = 0;
|
|
virtual void setPriority(int) = 0;
|
|
virtual bool isOptimal() const = 0;
|
|
virtual bool isWrongConfiguration() const = 0;
|
|
virtual void setWrongConfiguration(bool) = 0;
|
|
virtual void addServers(const vector<UID> &servers) = 0;
|
|
|
|
std::string getDesc() const {
|
|
const auto& servers = getLastKnownServerInterfaces();
|
|
std::string s = format("Size %d; ", servers.size());
|
|
for(int i=0; i<servers.size(); i++) {
|
|
if (i) s += ", ";
|
|
s += servers[i].address().toString() + " " + servers[i].id().shortString();
|
|
}
|
|
return s;
|
|
}
|
|
};
|
|
|
|
struct GetTeamRequest {
|
|
bool wantsNewServers;
|
|
bool wantsTrueBest;
|
|
bool preferLowerUtilization;
|
|
bool teamMustHaveShards;
|
|
double inflightPenalty;
|
|
std::vector<UID> completeSources;
|
|
std::vector<UID> src;
|
|
Promise< std::pair<Optional<Reference<IDataDistributionTeam>>,bool> > reply;
|
|
|
|
GetTeamRequest() {}
|
|
GetTeamRequest( bool wantsNewServers, bool wantsTrueBest, bool preferLowerUtilization, bool teamMustHaveShards, double inflightPenalty = 1.0 )
|
|
: wantsNewServers( wantsNewServers ), wantsTrueBest( wantsTrueBest ), preferLowerUtilization( preferLowerUtilization ), teamMustHaveShards( teamMustHaveShards ), inflightPenalty( inflightPenalty ) {}
|
|
|
|
std::string getDesc() {
|
|
std::stringstream ss;
|
|
|
|
ss << "WantsNewServers:" << wantsNewServers << " WantsTrueBest:" << wantsTrueBest
|
|
<< " PreferLowerUtilization:" << preferLowerUtilization
|
|
<< " teamMustHaveShards:" << teamMustHaveShards
|
|
<< " inflightPenalty:" << inflightPenalty << ";";
|
|
ss << "CompleteSources:";
|
|
for (auto& cs : completeSources) {
|
|
ss << cs.toString() << ",";
|
|
}
|
|
|
|
return ss.str();
|
|
}
|
|
};
|
|
|
|
struct GetMetricsRequest {
|
|
KeyRange keys;
|
|
Promise< StorageMetrics > reply;
|
|
|
|
GetMetricsRequest() {}
|
|
GetMetricsRequest( KeyRange const& keys ) : keys(keys) {}
|
|
};
|
|
|
|
struct GetMetricsListRequest {
|
|
KeyRange keys;
|
|
int shardLimit;
|
|
Promise<Standalone<VectorRef<DDMetricsRef>>> reply;
|
|
|
|
GetMetricsListRequest() {}
|
|
GetMetricsListRequest( KeyRange const& keys, const int shardLimit ) : keys(keys), shardLimit(shardLimit) {}
|
|
};
|
|
|
|
struct TeamCollectionInterface {
|
|
PromiseStream< GetTeamRequest > getTeam;
|
|
};
|
|
|
|
class ShardsAffectedByTeamFailure : public ReferenceCounted<ShardsAffectedByTeamFailure> {
|
|
public:
|
|
ShardsAffectedByTeamFailure() {}
|
|
|
|
struct Team {
|
|
vector<UID> servers; // sorted
|
|
bool primary;
|
|
|
|
Team() : primary(true) {}
|
|
Team(vector<UID> const& servers, bool primary) : servers(servers), primary(primary) {}
|
|
|
|
bool operator < ( const Team& r ) const {
|
|
if( servers == r.servers ) return primary < r.primary;
|
|
return servers < r.servers;
|
|
}
|
|
bool operator>(const Team& r) const { return r < *this; }
|
|
bool operator<=(const Team& r) const { return !(*this > r); }
|
|
bool operator>=(const Team& r) const { return !(*this < r); }
|
|
bool operator == ( const Team& r ) const {
|
|
return servers == r.servers && primary == r.primary;
|
|
}
|
|
bool operator!=(const Team& r) const { return !(*this == r); }
|
|
};
|
|
|
|
// This tracks the data distribution on the data distribution server so that teamTrackers can
|
|
// relocate the right shards when a team is degraded.
|
|
|
|
// The following are important to make sure that failure responses don't revert splits or merges:
|
|
// - The shards boundaries in the two data structures reflect "queued" RelocateShard requests
|
|
// (i.e. reflects the desired set of shards being tracked by dataDistributionTracker,
|
|
// rather than the status quo). These boundaries are modified in defineShard and the content
|
|
// of what servers correspond to each shard is a copy or union of the shards already there
|
|
// - The teams associated with each shard reflect either the sources for non-moving shards
|
|
// or the destination team for in-flight shards (the change is atomic with respect to team selection).
|
|
// moveShard() changes the servers associated with a shard and will never adjust the shard
|
|
// boundaries. If a move is received for a shard that has been redefined (the exact shard is
|
|
// no longer in the map), the servers will be set for all contained shards and added to all
|
|
// intersecting shards.
|
|
|
|
int getNumberOfShards( UID ssID );
|
|
vector<KeyRange> getShardsFor( Team team );
|
|
bool hasShards(Team team);
|
|
|
|
//The first element of the pair is either the source for non-moving shards or the destination team for in-flight shards
|
|
//The second element of the pair is all previous sources for in-flight shards
|
|
std::pair<vector<Team>,vector<Team>> getTeamsFor( KeyRangeRef keys );
|
|
|
|
void defineShard( KeyRangeRef keys );
|
|
void moveShard( KeyRangeRef keys, std::vector<Team> destinationTeam );
|
|
void finishMove( KeyRangeRef keys );
|
|
void check();
|
|
void eraseServer(UID ssID);
|
|
private:
|
|
struct OrderByTeamKey {
|
|
bool operator()( const std::pair<Team,KeyRange>& lhs, const std::pair<Team,KeyRange>& rhs ) const {
|
|
if (lhs.first < rhs.first) return true;
|
|
if (lhs.first > rhs.first) return false;
|
|
return lhs.second.begin < rhs.second.begin;
|
|
}
|
|
};
|
|
|
|
KeyRangeMap< std::pair<vector<Team>,vector<Team>> > shard_teams; // A shard can be affected by the failure of multiple teams if it is a queued merge, or when usable_regions > 1
|
|
std::set< std::pair<Team,KeyRange>, OrderByTeamKey > team_shards;
|
|
std::map< UID, int > storageServerShards;
|
|
|
|
void erase(Team team, KeyRange const& range);
|
|
void insert(Team team, KeyRange const& range);
|
|
};
|
|
|
|
// DDShardInfo is so named to avoid link-time name collision with ShardInfo within the StorageServer
|
|
struct DDShardInfo {
|
|
Key key;
|
|
vector<UID> primarySrc;
|
|
vector<UID> remoteSrc;
|
|
vector<UID> primaryDest;
|
|
vector<UID> remoteDest;
|
|
bool hasDest;
|
|
|
|
explicit DDShardInfo(Key key) : key(key), hasDest(false) {}
|
|
};
|
|
|
|
struct InitialDataDistribution : ReferenceCounted<InitialDataDistribution> {
|
|
int mode;
|
|
vector<std::pair<StorageServerInterface, ProcessClass>> allServers;
|
|
std::set<vector<UID>> primaryTeams;
|
|
std::set<vector<UID>> remoteTeams;
|
|
vector<DDShardInfo> shards;
|
|
Optional<Key> initHealthyZoneValue;
|
|
};
|
|
|
|
Future<Void> dataDistributionTracker(
|
|
Reference<InitialDataDistribution> const& initData,
|
|
Database const& cx,
|
|
PromiseStream<RelocateShard> const& output,
|
|
Reference<ShardsAffectedByTeamFailure> const& shardsAffectedByTeamFailure,
|
|
PromiseStream<GetMetricsRequest> const& getShardMetrics,
|
|
PromiseStream<GetMetricsListRequest> const& getShardMetricsList,
|
|
FutureStream<Promise<int64_t>> const& getAverageShardBytes,
|
|
Promise<Void> const& readyToStart,
|
|
Reference<AsyncVar<bool>> const& zeroHealthyTeams,
|
|
UID const& distributorId);
|
|
|
|
Future<Void> dataDistributionQueue(
|
|
Database const& cx,
|
|
PromiseStream<RelocateShard> const& output,
|
|
FutureStream<RelocateShard> const& input,
|
|
PromiseStream<GetMetricsRequest> const& getShardMetrics,
|
|
Reference<AsyncVar<bool>> const& processingUnhealthy,
|
|
vector<TeamCollectionInterface> const& teamCollection,
|
|
Reference<ShardsAffectedByTeamFailure> const& shardsAffectedByTeamFailure,
|
|
MoveKeysLock const& lock,
|
|
PromiseStream<Promise<int64_t>> const& getAverageShardBytes,
|
|
UID const& distributorId,
|
|
int const& teamSize,
|
|
int const& singleRegionTeamSize,
|
|
double* const& lastLimited);
|
|
|
|
//Holds the permitted size and IO Bounds for a shard
|
|
struct ShardSizeBounds {
|
|
StorageMetrics max;
|
|
StorageMetrics min;
|
|
StorageMetrics permittedError;
|
|
|
|
bool operator == ( ShardSizeBounds const& rhs ) const {
|
|
return max == rhs.max && min == rhs.min && permittedError == rhs.permittedError;
|
|
}
|
|
};
|
|
|
|
//Gets the permitted size and IO bounds for a shard
|
|
ShardSizeBounds getShardSizeBounds(KeyRangeRef shard, int64_t maxShardSize);
|
|
|
|
//Determines the maximum shard size based on the size of the database
|
|
int64_t getMaxShardSize( double dbSizeEstimate );
|
|
|
|
struct DDTeamCollection;
|
|
ACTOR Future<vector<std::pair<StorageServerInterface, ProcessClass>>> getServerListAndProcessClasses(Transaction* tr);
|
|
|
|
#include "flow/unactorcompiler.h"
|
|
#endif
|