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meta_cache.go
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meta_cache.go
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// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
package metacache
import (
"sync"
"github.com/samber/lo"
"go.uber.org/zap"
"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
"github.com/milvus-io/milvus/internal/proto/datapb"
"github.com/milvus-io/milvus/internal/storage"
"github.com/milvus-io/milvus/pkg/log"
)
//go:generate mockery --name=MetaCache --structname=MockMetaCache --output=./ --filename=mock_meta_cache.go --with-expecter --inpackage
type MetaCache interface {
// Collection returns collection id of metacache.
Collection() int64
// Schema returns collection schema.
Schema() *schemapb.CollectionSchema
// AddSegment adds a segment from segment info.
AddSegment(segInfo *datapb.SegmentInfo, factory PkStatsFactory, actions ...SegmentAction)
// UpdateSegments applies action to segment(s) satisfy the provided filters.
UpdateSegments(action SegmentAction, filters ...SegmentFilter)
// RemoveSegments removes segments matches the provided filter.
RemoveSegments(filters ...SegmentFilter) []int64
// GetSegmentsBy returns segments statify the provided filters.
GetSegmentsBy(filters ...SegmentFilter) []*SegmentInfo
// GetSegmentByID returns segment with provided segment id if exists.
GetSegmentByID(id int64, filters ...SegmentFilter) (*SegmentInfo, bool)
// GetSegmentIDs returns ids of segments which satifiy the provided filters.
GetSegmentIDsBy(filters ...SegmentFilter) []int64
// PredictSegments returns the segment ids which may contain the provided primary key.
PredictSegments(pk storage.PrimaryKey, filters ...SegmentFilter) ([]int64, bool)
// DetectMissingSegments returns the segment ids which is missing in datanode.
DetectMissingSegments(segments map[int64]struct{}) []int64
// UpdateSegmentView updates the segments BF from datacoord view.
UpdateSegmentView(partitionID int64, newSegments []*datapb.SyncSegmentInfo, newSegmentsBF []*BloomFilterSet, allSegments map[int64]struct{})
}
var _ MetaCache = (*metaCacheImpl)(nil)
type PkStatsFactory func(vchannel *datapb.SegmentInfo) *BloomFilterSet
type metaCacheImpl struct {
collectionID int64
vChannelName string
schema *schemapb.CollectionSchema
mu sync.RWMutex
segmentInfos map[int64]*SegmentInfo
stateSegments map[commonpb.SegmentState]map[int64]*SegmentInfo
}
func NewMetaCache(info *datapb.ChannelWatchInfo, factory PkStatsFactory) MetaCache {
vchannel := info.GetVchan()
cache := &metaCacheImpl{
collectionID: vchannel.GetCollectionID(),
vChannelName: vchannel.GetChannelName(),
segmentInfos: make(map[int64]*SegmentInfo),
stateSegments: make(map[commonpb.SegmentState]map[int64]*SegmentInfo),
schema: info.GetSchema(),
}
for _, state := range []commonpb.SegmentState{
commonpb.SegmentState_Growing,
commonpb.SegmentState_Sealed,
commonpb.SegmentState_Flushing,
commonpb.SegmentState_Flushed,
commonpb.SegmentState_Dropped,
commonpb.SegmentState_Importing,
} {
cache.stateSegments[state] = make(map[int64]*SegmentInfo)
}
cache.init(vchannel, factory)
return cache
}
func (c *metaCacheImpl) init(vchannel *datapb.VchannelInfo, factory PkStatsFactory) {
for _, seg := range vchannel.FlushedSegments {
c.addSegment(NewSegmentInfo(seg, factory(seg)))
}
for _, seg := range vchannel.UnflushedSegments {
// segment state could be sealed for growing segment if flush request processed before datanode watch
seg.State = commonpb.SegmentState_Growing
c.addSegment(NewSegmentInfo(seg, factory(seg)))
}
}
// Collection returns collection id of metacache.
func (c *metaCacheImpl) Collection() int64 {
return c.collectionID
}
// Schema returns collection schema.
func (c *metaCacheImpl) Schema() *schemapb.CollectionSchema {
return c.schema
}
// AddSegment adds a segment from segment info.
func (c *metaCacheImpl) AddSegment(segInfo *datapb.SegmentInfo, factory PkStatsFactory, actions ...SegmentAction) {
segment := NewSegmentInfo(segInfo, factory(segInfo))
for _, action := range actions {
action(segment)
}
c.mu.Lock()
defer c.mu.Unlock()
c.addSegment(segment)
}
func (c *metaCacheImpl) addSegment(segment *SegmentInfo) {
segID := segment.SegmentID()
c.segmentInfos[segID] = segment
c.stateSegments[segment.State()][segID] = segment
}
func (c *metaCacheImpl) RemoveSegments(filters ...SegmentFilter) []int64 {
if len(filters) == 0 {
log.Warn("remove segment without filters is not allowed", zap.Stack("callstack"))
return nil
}
c.mu.Lock()
defer c.mu.Unlock()
var result []int64
process := func(id int64, info *SegmentInfo) {
delete(c.segmentInfos, id)
delete(c.stateSegments[info.State()], id)
result = append(result, id)
}
c.rangeWithFilter(process, filters...)
return result
}
func (c *metaCacheImpl) GetSegmentsBy(filters ...SegmentFilter) []*SegmentInfo {
c.mu.RLock()
defer c.mu.RUnlock()
var segments []*SegmentInfo
c.rangeWithFilter(func(_ int64, info *SegmentInfo) {
segments = append(segments, info)
}, filters...)
return segments
}
// GetSegmentByID returns segment with provided segment id if exists.
func (c *metaCacheImpl) GetSegmentByID(id int64, filters ...SegmentFilter) (*SegmentInfo, bool) {
c.mu.RLock()
defer c.mu.RUnlock()
segment, ok := c.segmentInfos[id]
if !ok {
return nil, false
}
for _, filter := range filters {
if !filter.Filter(segment) {
return nil, false
}
}
return segment, ok
}
func (c *metaCacheImpl) GetSegmentIDsBy(filters ...SegmentFilter) []int64 {
segments := c.GetSegmentsBy(filters...)
return lo.Map(segments, func(info *SegmentInfo, _ int) int64 { return info.SegmentID() })
}
func (c *metaCacheImpl) UpdateSegments(action SegmentAction, filters ...SegmentFilter) {
c.mu.Lock()
defer c.mu.Unlock()
c.rangeWithFilter(func(id int64, info *SegmentInfo) {
nInfo := info.Clone()
action(nInfo)
c.segmentInfos[id] = nInfo
delete(c.stateSegments[info.State()], info.SegmentID())
c.stateSegments[nInfo.State()][nInfo.SegmentID()] = nInfo
}, filters...)
}
func (c *metaCacheImpl) PredictSegments(pk storage.PrimaryKey, filters ...SegmentFilter) ([]int64, bool) {
var predicts []int64
lc := storage.NewLocationsCache(pk)
segments := c.GetSegmentsBy(filters...)
for _, segment := range segments {
if segment.GetBloomFilterSet().PkExists(lc) {
predicts = append(predicts, segment.segmentID)
}
}
return predicts, len(predicts) > 0
}
func (c *metaCacheImpl) rangeWithFilter(fn func(id int64, info *SegmentInfo), filters ...SegmentFilter) {
criterion := &segmentCriterion{}
for _, filter := range filters {
filter.AddFilter(criterion)
}
var candidates []map[int64]*SegmentInfo
if criterion.states != nil {
candidates = lo.Map(criterion.states.Collect(), func(state commonpb.SegmentState, _ int) map[int64]*SegmentInfo {
return c.stateSegments[state]
})
} else {
candidates = []map[int64]*SegmentInfo{
c.segmentInfos,
}
}
for _, candidate := range candidates {
var segments map[int64]*SegmentInfo
if criterion.ids != nil {
segments = lo.SliceToMap(lo.FilterMap(criterion.ids.Collect(), func(id int64, _ int) (*SegmentInfo, bool) {
segment, ok := candidate[id]
return segment, ok
}), func(segment *SegmentInfo) (int64, *SegmentInfo) {
return segment.SegmentID(), segment
})
} else {
segments = candidate
}
for id, segment := range segments {
if criterion.Match(segment) {
fn(id, segment)
}
}
}
}
func (c *metaCacheImpl) DetectMissingSegments(segments map[int64]struct{}) []int64 {
c.mu.RLock()
defer c.mu.RUnlock()
missingSegments := make([]int64, 0)
for segID := range segments {
if _, ok := c.segmentInfos[segID]; !ok {
missingSegments = append(missingSegments, segID)
}
}
return missingSegments
}
func (c *metaCacheImpl) UpdateSegmentView(partitionID int64,
newSegments []*datapb.SyncSegmentInfo,
newSegmentsBF []*BloomFilterSet,
allSegments map[int64]struct{},
) {
c.mu.Lock()
defer c.mu.Unlock()
for i, info := range newSegments {
// check again
if _, ok := c.segmentInfos[info.GetSegmentId()]; !ok {
segInfo := &SegmentInfo{
segmentID: info.GetSegmentId(),
partitionID: partitionID,
state: info.GetState(),
level: info.GetLevel(),
flushedRows: info.GetNumOfRows(),
startPosRecorded: true,
bfs: newSegmentsBF[i],
}
c.segmentInfos[info.GetSegmentId()] = segInfo
c.stateSegments[info.GetState()][info.GetSegmentId()] = segInfo
log.Info("metacache does not have segment, add it", zap.Int64("segmentID", info.GetSegmentId()))
}
}
for segID, info := range c.segmentInfos {
if info.partitionID != partitionID ||
(info.Level() == datapb.SegmentLevel_L0 && info.State() == commonpb.SegmentState_Growing) {
continue
}
if _, ok := allSegments[segID]; !ok {
log.Info("remove dropped segment", zap.Int64("segmentID", segID))
delete(c.segmentInfos, segID)
delete(c.stateSegments[info.State()], segID)
}
}
}