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567 lines
18 KiB
Go
567 lines
18 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package querynode
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/*
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#cgo CFLAGS: -I${SRCDIR}/../core/output/include
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#cgo LDFLAGS: -L${SRCDIR}/../core/output/lib -lmilvus_segcore -Wl,-rpath=${SRCDIR}/../core/output/lib
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#include "segcore/collection_c.h"
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#include "segcore/segment_c.h"
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*/
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import "C"
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import (
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"errors"
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"fmt"
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etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
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"github.com/milvus-io/milvus/internal/proto/datapb"
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"strconv"
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"sync"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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"github.com/milvus-io/milvus/internal/proto/schemapb"
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)
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/*
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* collectionReplica contains a in-memory local copy of persistent collections.
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* In common cases, the system has multiple query nodes. Data of a collection will be
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* distributed across all the available query nodes, and each query node's collectionReplica
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* will maintain its own share (only part of the collection).
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* Every replica tracks a value called tSafe which is the maximum timestamp that the replica
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* is up-to-date.
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*/
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type ReplicaInterface interface {
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// collection
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getCollectionIDs() []UniqueID
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addCollection(collectionID UniqueID, schema *schemapb.CollectionSchema) error
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removeCollection(collectionID UniqueID) error
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getCollectionByID(collectionID UniqueID) (*Collection, error)
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hasCollection(collectionID UniqueID) bool
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getCollectionNum() int
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getPartitionIDs(collectionID UniqueID) ([]UniqueID, error)
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getVecFieldIDsByCollectionID(collectionID UniqueID) ([]FieldID, error)
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// partition
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addPartition(collectionID UniqueID, partitionID UniqueID) error
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removePartition(partitionID UniqueID) error
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getPartitionByID(partitionID UniqueID) (*Partition, error)
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hasPartition(partitionID UniqueID) bool
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getPartitionNum() int
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getSegmentIDs(partitionID UniqueID) ([]UniqueID, error)
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getSegmentIDsByVChannel(partitionID UniqueID, vChannel Channel) ([]UniqueID, error)
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// segment
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addSegment(segmentID UniqueID, partitionID UniqueID, collectionID UniqueID, vChannelID Channel, segType segmentType, onService bool) error
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setSegment(segment *Segment) error
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removeSegment(segmentID UniqueID) error
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getSegmentByID(segmentID UniqueID) (*Segment, error)
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hasSegment(segmentID UniqueID) bool
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getSegmentNum() int
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getSegmentStatistics() []*internalpb.SegmentStats
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// excluded segments
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initExcludedSegments(collectionID UniqueID)
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removeExcludedSegments(collectionID UniqueID)
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addExcludedSegments(collectionID UniqueID, segmentInfos []*datapb.SegmentInfo) error
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getExcludedSegments(collectionID UniqueID) ([]*datapb.SegmentInfo, error)
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getSegmentsMemSize() int64
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freeAll()
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printReplica()
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}
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// collectionReplica is the data replication of memory data in query node.
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// It implements `ReplicaInterface` interface.
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type collectionReplica struct {
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mu sync.RWMutex // guards all
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collections map[UniqueID]*Collection
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partitions map[UniqueID]*Partition
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segments map[UniqueID]*Segment
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excludedSegments map[UniqueID][]*datapb.SegmentInfo // map[collectionID]segmentIDs
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etcdKV *etcdkv.EtcdKV
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}
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// getSegmentsMemSize get the memory size in bytes of all the Segments
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func (colReplica *collectionReplica) getSegmentsMemSize() int64 {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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memSize := int64(0)
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for _, segment := range colReplica.segments {
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memSize += segment.getMemSize()
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}
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return memSize
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}
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// printReplica prints the collections, partitions and segments in the collectionReplica
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func (colReplica *collectionReplica) printReplica() {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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log.Debug("collections in collectionReplica", zap.Any("info", colReplica.collections))
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log.Debug("partitions in collectionReplica", zap.Any("info", colReplica.partitions))
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log.Debug("segments in collectionReplica", zap.Any("info", colReplica.segments))
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log.Debug("excludedSegments in collectionReplica", zap.Any("info", colReplica.excludedSegments))
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}
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//----------------------------------------------------------------------------------------------------- collection
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// getCollectionIDs gets all the collection ids in the collectionReplica
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func (colReplica *collectionReplica) getCollectionIDs() []UniqueID {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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collectionIDs := make([]UniqueID, 0)
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for id := range colReplica.collections {
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collectionIDs = append(collectionIDs, id)
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}
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return collectionIDs
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}
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// addCollection creates a new collection and add it to collectionReplica
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func (colReplica *collectionReplica) addCollection(collectionID UniqueID, schema *schemapb.CollectionSchema) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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if ok := colReplica.hasCollectionPrivate(collectionID); ok {
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return errors.New("collection has been loaded, id %d" + strconv.FormatInt(collectionID, 10))
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}
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var newCollection = newCollection(collectionID, schema)
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colReplica.collections[collectionID] = newCollection
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return nil
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}
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// removeCollection removes the collection from collectionReplica
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func (colReplica *collectionReplica) removeCollection(collectionID UniqueID) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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return colReplica.removeCollectionPrivate(collectionID)
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}
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// removeCollectionPrivate is the private function in collectionReplica, to remove collection from collectionReplica
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func (colReplica *collectionReplica) removeCollectionPrivate(collectionID UniqueID) error {
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collection, err := colReplica.getCollectionByIDPrivate(collectionID)
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if err != nil {
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return err
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}
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// delete partitions
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for _, partitionID := range collection.partitionIDs {
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// ignore error, try to delete
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_ = colReplica.removePartitionPrivate(partitionID)
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}
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deleteCollection(collection)
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delete(colReplica.collections, collectionID)
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return nil
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}
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// getCollectionByID gets the collection which id is collectionID
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func (colReplica *collectionReplica) getCollectionByID(collectionID UniqueID) (*Collection, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.getCollectionByIDPrivate(collectionID)
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}
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// getCollectionByIDPrivate is the private function in collectionReplica, to get collection from collectionReplica
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func (colReplica *collectionReplica) getCollectionByIDPrivate(collectionID UniqueID) (*Collection, error) {
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collection, ok := colReplica.collections[collectionID]
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if !ok {
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return nil, errors.New("collection hasn't been loaded or has been released, collection id = %d" + strconv.FormatInt(collectionID, 10))
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}
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return collection, nil
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}
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// hasCollection checks if collectionReplica has the collection which id is collectionID
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func (colReplica *collectionReplica) hasCollection(collectionID UniqueID) bool {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.hasCollectionPrivate(collectionID)
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}
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// hasCollectionPrivate is the private function in collectionReplica, to check collection in collectionReplica
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func (colReplica *collectionReplica) hasCollectionPrivate(collectionID UniqueID) bool {
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_, ok := colReplica.collections[collectionID]
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return ok
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}
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// getCollectionNum returns num of collections in collectionReplica
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func (colReplica *collectionReplica) getCollectionNum() int {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return len(colReplica.collections)
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}
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// getPartitionIDs returns partition ids of collection
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func (colReplica *collectionReplica) getPartitionIDs(collectionID UniqueID) ([]UniqueID, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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collection, err := colReplica.getCollectionByIDPrivate(collectionID)
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if err != nil {
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return nil, err
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}
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return collection.partitionIDs, nil
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}
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// getVecFieldIDsByCollectionID returns vector field ids of collection
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func (colReplica *collectionReplica) getVecFieldIDsByCollectionID(collectionID UniqueID) ([]FieldID, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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fields, err := colReplica.getFieldsByCollectionIDPrivate(collectionID)
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if err != nil {
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return nil, err
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}
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vecFields := make([]FieldID, 0)
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for _, field := range fields {
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if field.DataType == schemapb.DataType_BinaryVector || field.DataType == schemapb.DataType_FloatVector {
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vecFields = append(vecFields, field.FieldID)
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}
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}
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return vecFields, nil
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}
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func (colReplica *collectionReplica) getFieldsByCollectionIDPrivate(collectionID UniqueID) ([]*schemapb.FieldSchema, error) {
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collection, err := colReplica.getCollectionByIDPrivate(collectionID)
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if err != nil {
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return nil, err
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}
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if len(collection.Schema().Fields) <= 0 {
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return nil, errors.New("no field in collection %d" + strconv.FormatInt(collectionID, 10))
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}
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return collection.Schema().Fields, nil
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}
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//----------------------------------------------------------------------------------------------------- partition
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func (colReplica *collectionReplica) addPartition(collectionID UniqueID, partitionID UniqueID) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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return colReplica.addPartitionPrivate(collectionID, partitionID)
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}
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func (colReplica *collectionReplica) addPartitionPrivate(collectionID UniqueID, partitionID UniqueID) error {
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collection, err := colReplica.getCollectionByIDPrivate(collectionID)
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if err != nil {
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return err
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}
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collection.addPartitionID(partitionID)
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var newPartition = newPartition(collectionID, partitionID)
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colReplica.partitions[partitionID] = newPartition
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return nil
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}
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func (colReplica *collectionReplica) removePartition(partitionID UniqueID) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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return colReplica.removePartitionPrivate(partitionID)
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}
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func (colReplica *collectionReplica) removePartitionPrivate(partitionID UniqueID) error {
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partition, err := colReplica.getPartitionByIDPrivate(partitionID)
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if err != nil {
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return err
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}
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collection, err := colReplica.getCollectionByIDPrivate(partition.collectionID)
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if err != nil {
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return err
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}
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// delete segments
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for _, segmentID := range partition.segmentIDs {
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// try to delete, ignore error
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_ = colReplica.removeSegmentPrivate(segmentID)
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}
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collection.removePartitionID(partitionID)
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delete(colReplica.partitions, partitionID)
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return nil
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}
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func (colReplica *collectionReplica) getPartitionByID(partitionID UniqueID) (*Partition, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.getPartitionByIDPrivate(partitionID)
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}
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func (colReplica *collectionReplica) getPartitionByIDPrivate(partitionID UniqueID) (*Partition, error) {
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partition, ok := colReplica.partitions[partitionID]
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if !ok {
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return nil, errors.New("partition hasn't been loaded or has been released, partition id = %d" + strconv.FormatInt(partitionID, 10))
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}
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return partition, nil
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}
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func (colReplica *collectionReplica) hasPartition(partitionID UniqueID) bool {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.hasPartitionPrivate(partitionID)
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}
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func (colReplica *collectionReplica) hasPartitionPrivate(partitionID UniqueID) bool {
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_, ok := colReplica.partitions[partitionID]
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return ok
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}
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func (colReplica *collectionReplica) getPartitionNum() int {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return len(colReplica.partitions)
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}
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func (colReplica *collectionReplica) getSegmentIDs(partitionID UniqueID) ([]UniqueID, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.getSegmentIDsPrivate(partitionID)
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}
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func (colReplica *collectionReplica) getSegmentIDsByVChannel(partitionID UniqueID, vChannel Channel) ([]UniqueID, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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segmentIDs, err := colReplica.getSegmentIDsPrivate(partitionID)
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if err != nil {
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return nil, err
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}
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segmentIDsTmp := make([]UniqueID, 0)
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for _, segmentID := range segmentIDs {
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segment, err := colReplica.getSegmentByIDPrivate(segmentID)
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if err != nil {
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return nil, err
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}
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if segment.vChannelID == vChannel {
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segmentIDsTmp = append(segmentIDsTmp, segment.ID())
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}
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}
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return segmentIDsTmp, nil
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}
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func (colReplica *collectionReplica) getSegmentIDsPrivate(partitionID UniqueID) ([]UniqueID, error) {
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partition, err2 := colReplica.getPartitionByIDPrivate(partitionID)
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if err2 != nil {
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return nil, err2
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}
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return partition.segmentIDs, nil
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}
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//----------------------------------------------------------------------------------------------------- segment
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func (colReplica *collectionReplica) addSegment(segmentID UniqueID, partitionID UniqueID, collectionID UniqueID, vChannelID Channel, segType segmentType, onService bool) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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collection, err := colReplica.getCollectionByIDPrivate(collectionID)
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if err != nil {
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return err
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}
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seg := newSegment(collection, segmentID, partitionID, collectionID, vChannelID, segType, onService)
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return colReplica.addSegmentPrivate(segmentID, partitionID, seg)
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}
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func (colReplica *collectionReplica) addSegmentPrivate(segmentID UniqueID, partitionID UniqueID, segment *Segment) error {
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partition, err := colReplica.getPartitionByIDPrivate(partitionID)
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if err != nil {
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return err
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}
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if colReplica.hasSegmentPrivate(segmentID) {
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return nil
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}
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partition.addSegmentID(segmentID)
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colReplica.segments[segmentID] = segment
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return nil
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}
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func (colReplica *collectionReplica) setSegment(segment *Segment) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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_, err := colReplica.getCollectionByIDPrivate(segment.collectionID)
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if err != nil {
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return err
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}
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return colReplica.addSegmentPrivate(segment.segmentID, segment.partitionID, segment)
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}
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func (colReplica *collectionReplica) removeSegment(segmentID UniqueID) error {
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colReplica.mu.Lock()
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defer colReplica.mu.Unlock()
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return colReplica.removeSegmentPrivate(segmentID)
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}
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func (colReplica *collectionReplica) removeSegmentPrivate(segmentID UniqueID) error {
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log.Debug("remove segment", zap.Int64("segmentID", segmentID))
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segment, err := colReplica.getSegmentByIDPrivate(segmentID)
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if err != nil {
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return err
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}
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partition, err2 := colReplica.getPartitionByIDPrivate(segment.partitionID)
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if err2 != nil {
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return err
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}
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partition.removeSegmentID(segmentID)
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delete(colReplica.segments, segmentID)
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deleteSegment(segment)
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key := fmt.Sprintf("%s/%d", queryNodeSegmentMetaPrefix, segmentID)
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err = colReplica.etcdKV.Remove(key)
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if err != nil {
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log.Warn("error when remove segment info from etcd")
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}
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return nil
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}
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func (colReplica *collectionReplica) getSegmentByID(segmentID UniqueID) (*Segment, error) {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.getSegmentByIDPrivate(segmentID)
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}
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func (colReplica *collectionReplica) getSegmentByIDPrivate(segmentID UniqueID) (*Segment, error) {
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segment, ok := colReplica.segments[segmentID]
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if !ok {
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return nil, errors.New("cannot find segment in query node, id = " + strconv.FormatInt(segmentID, 10))
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}
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return segment, nil
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}
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func (colReplica *collectionReplica) hasSegment(segmentID UniqueID) bool {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return colReplica.hasSegmentPrivate(segmentID)
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}
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func (colReplica *collectionReplica) hasSegmentPrivate(segmentID UniqueID) bool {
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_, ok := colReplica.segments[segmentID]
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return ok
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}
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func (colReplica *collectionReplica) getSegmentNum() int {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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return len(colReplica.segments)
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}
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func (colReplica *collectionReplica) getSegmentStatistics() []*internalpb.SegmentStats {
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colReplica.mu.RLock()
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defer colReplica.mu.RUnlock()
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var statisticData = make([]*internalpb.SegmentStats, 0)
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for segmentID, segment := range colReplica.segments {
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currentMemSize := segment.getMemSize()
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segment.lastMemSize = currentMemSize
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segmentNumOfRows := segment.getRowCount()
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stat := internalpb.SegmentStats{
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SegmentID: segmentID,
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MemorySize: currentMemSize,
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NumRows: segmentNumOfRows,
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RecentlyModified: segment.getRecentlyModified(),
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}
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statisticData = append(statisticData, &stat)
|
|
segment.setRecentlyModified(false)
|
|
}
|
|
|
|
return statisticData
|
|
}
|
|
|
|
func (colReplica *collectionReplica) initExcludedSegments(collectionID UniqueID) {
|
|
colReplica.mu.Lock()
|
|
defer colReplica.mu.Unlock()
|
|
|
|
if _, ok := colReplica.excludedSegments[collectionID]; !ok {
|
|
colReplica.excludedSegments[collectionID] = make([]*datapb.SegmentInfo, 0)
|
|
}
|
|
}
|
|
|
|
func (colReplica *collectionReplica) removeExcludedSegments(collectionID UniqueID) {
|
|
colReplica.mu.Lock()
|
|
defer colReplica.mu.Unlock()
|
|
|
|
delete(colReplica.excludedSegments, collectionID)
|
|
}
|
|
|
|
func (colReplica *collectionReplica) addExcludedSegments(collectionID UniqueID, segmentInfos []*datapb.SegmentInfo) error {
|
|
colReplica.mu.Lock()
|
|
defer colReplica.mu.Unlock()
|
|
|
|
if _, ok := colReplica.excludedSegments[collectionID]; !ok {
|
|
return errors.New("addExcludedSegments failed, cannot found collection, id =" + fmt.Sprintln(collectionID))
|
|
}
|
|
|
|
colReplica.excludedSegments[collectionID] = append(colReplica.excludedSegments[collectionID], segmentInfos...)
|
|
return nil
|
|
}
|
|
|
|
func (colReplica *collectionReplica) getExcludedSegments(collectionID UniqueID) ([]*datapb.SegmentInfo, error) {
|
|
colReplica.mu.RLock()
|
|
defer colReplica.mu.RUnlock()
|
|
|
|
if _, ok := colReplica.excludedSegments[collectionID]; !ok {
|
|
return nil, errors.New("getExcludedSegments failed, cannot found collection, id =" + fmt.Sprintln(collectionID))
|
|
}
|
|
|
|
return colReplica.excludedSegments[collectionID], nil
|
|
}
|
|
|
|
func (colReplica *collectionReplica) freeAll() {
|
|
colReplica.mu.Lock()
|
|
defer colReplica.mu.Unlock()
|
|
|
|
for id := range colReplica.collections {
|
|
_ = colReplica.removeCollectionPrivate(id)
|
|
}
|
|
|
|
colReplica.collections = make(map[UniqueID]*Collection)
|
|
colReplica.partitions = make(map[UniqueID]*Partition)
|
|
colReplica.segments = make(map[UniqueID]*Segment)
|
|
}
|
|
|
|
func newCollectionReplica(etcdKv *etcdkv.EtcdKV) ReplicaInterface {
|
|
collections := make(map[UniqueID]*Collection)
|
|
partitions := make(map[UniqueID]*Partition)
|
|
segments := make(map[UniqueID]*Segment)
|
|
excludedSegments := make(map[UniqueID][]*datapb.SegmentInfo)
|
|
|
|
var replica ReplicaInterface = &collectionReplica{
|
|
collections: collections,
|
|
partitions: partitions,
|
|
segments: segments,
|
|
|
|
excludedSegments: excludedSegments,
|
|
etcdKV: etcdKv,
|
|
}
|
|
|
|
return replica
|
|
}
|