mirror of https://github.com/milvus-io/milvus.git
127 lines
3.6 KiB
Go
127 lines
3.6 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "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
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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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package querycoord
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import (
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"fmt"
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"sync"
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"github.com/golang/protobuf/proto"
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"github.com/milvus-io/milvus/internal/kv"
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"github.com/milvus-io/milvus/internal/metrics"
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"github.com/milvus-io/milvus/internal/proto/querypb"
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"github.com/milvus-io/milvus/internal/util"
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)
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// segmentsInfo provides interfaces to do persistence/retrieve for segments with an in-memory cache
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type segmentsInfo struct {
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mu sync.RWMutex
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loadOnce sync.Once
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segmentIDMap map[int64]*querypb.SegmentInfo
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kv kv.TxnKV
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}
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func newSegmentsInfo(kv kv.TxnKV) *segmentsInfo {
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return &segmentsInfo{
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kv: kv,
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segmentIDMap: make(map[int64]*querypb.SegmentInfo),
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}
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}
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func (s *segmentsInfo) loadSegments() error {
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var err error
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s.loadOnce.Do(func() {
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var values []string
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_, values, err = s.kv.LoadWithPrefix(util.SegmentMetaPrefix)
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if err != nil {
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return
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}
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numRowsCnt := float64(0)
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for _, v := range values {
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segment := &querypb.SegmentInfo{}
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if err = proto.Unmarshal([]byte(v), segment); err != nil {
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return
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}
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s.segmentIDMap[segment.GetSegmentID()] = segment
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numRowsCnt += float64(segment.NumRows)
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// Compatibility for old meta format
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if len(segment.NodeIds) == 0 {
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segment.NodeIds = append(segment.NodeIds, segment.NodeID)
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}
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// rewrite segment info
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err = s.saveSegment(segment)
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if err != nil {
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return
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}
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}
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metrics.QueryCoordNumEntities.WithLabelValues().Add(numRowsCnt)
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})
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return err
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}
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func (s *segmentsInfo) saveSegment(segment *querypb.SegmentInfo) error {
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s.mu.Lock()
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defer s.mu.Unlock()
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k := getSegmentKey(segment)
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v, err := proto.Marshal(segment)
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if err != nil {
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return err
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}
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if err = s.kv.Save(k, string(v)); err != nil {
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return err
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}
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s.segmentIDMap[segment.GetSegmentID()] = segment
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metrics.QueryCoordNumEntities.WithLabelValues().Add(float64(segment.NumRows))
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return nil
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}
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func (s *segmentsInfo) removeSegment(segment *querypb.SegmentInfo) error {
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s.mu.Lock()
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defer s.mu.Unlock()
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k := getSegmentKey(segment)
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if err := s.kv.Remove(k); err != nil {
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return err
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}
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delete(s.segmentIDMap, segment.GetSegmentID())
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metrics.QueryCoordNumEntities.WithLabelValues().Sub(float64(segment.NumRows))
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return nil
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}
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func (s *segmentsInfo) getSegment(ID int64) *querypb.SegmentInfo {
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s.mu.RLock()
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defer s.mu.RUnlock()
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return proto.Clone(s.segmentIDMap[ID]).(*querypb.SegmentInfo)
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}
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func (s *segmentsInfo) getSegments() []*querypb.SegmentInfo {
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s.mu.RLock()
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defer s.mu.RUnlock()
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res := make([]*querypb.SegmentInfo, 0, len(s.segmentIDMap))
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for _, segment := range s.segmentIDMap {
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res = append(res, proto.Clone(segment).(*querypb.SegmentInfo))
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}
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return res
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}
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func getSegmentKey(segment *querypb.SegmentInfo) string {
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return fmt.Sprintf("%s/%d/%d/%d", util.SegmentMetaPrefix, segment.GetCollectionID(), segment.GetPartitionID(),
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segment.GetSegmentID())
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}
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