mirror of
https://gitee.com/milvus-io/milvus.git
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290 lines
8.0 KiB
Go
290 lines
8.0 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 datacoord
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import (
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"context"
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"path"
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"strings"
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"sync"
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"time"
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"github.com/milvus-io/milvus-proto/go-api/commonpb"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/datapb"
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"github.com/milvus-io/milvus/internal/storage"
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"github.com/milvus-io/milvus/internal/types"
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"github.com/milvus-io/milvus/internal/util/typeutil"
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"github.com/minio/minio-go/v7"
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"github.com/samber/lo"
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"go.uber.org/zap"
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)
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const (
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//TODO silverxia change to configuration
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insertLogPrefix = `insert_log`
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statsLogPrefix = `stats_log`
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deltaLogPrefix = `delta_log`
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)
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// GcOption garbage collection options
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type GcOption struct {
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cli storage.ChunkManager // client
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enabled bool // enable switch
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checkInterval time.Duration // each interval
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missingTolerance time.Duration // key missing in meta tolerance time
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dropTolerance time.Duration // dropped segment related key tolerance time
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}
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// garbageCollector handles garbage files in object storage
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// which could be dropped collection remanent or data node failure traces
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type garbageCollector struct {
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option GcOption
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meta *meta
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handler Handler
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segRefer *SegmentReferenceManager
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indexCoord types.IndexCoord
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startOnce sync.Once
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stopOnce sync.Once
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wg sync.WaitGroup
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closeCh chan struct{}
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}
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// newGarbageCollector create garbage collector with meta and option
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func newGarbageCollector(meta *meta, handler Handler, segRefer *SegmentReferenceManager, indexCoord types.IndexCoord, opt GcOption) *garbageCollector {
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log.Info("GC with option", zap.Bool("enabled", opt.enabled), zap.Duration("interval", opt.checkInterval),
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zap.Duration("missingTolerance", opt.missingTolerance), zap.Duration("dropTolerance", opt.dropTolerance))
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return &garbageCollector{
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meta: meta,
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handler: handler,
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segRefer: segRefer,
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indexCoord: indexCoord,
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option: opt,
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closeCh: make(chan struct{}),
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}
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}
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// start a goroutine and perform gc check every `checkInterval`
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func (gc *garbageCollector) start() {
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if gc.option.enabled {
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if gc.option.cli == nil {
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log.Warn("DataCoord gc enabled, but SSO client is not provided")
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return
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}
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gc.startOnce.Do(func() {
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gc.wg.Add(1)
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go gc.work()
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})
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}
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}
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// work contains actual looping check logic
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func (gc *garbageCollector) work() {
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defer gc.wg.Done()
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ticker := time.Tick(gc.option.checkInterval)
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for {
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select {
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case <-ticker:
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gc.clearEtcd()
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gc.scan()
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case <-gc.closeCh:
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log.Warn("garbage collector quit")
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return
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}
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}
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}
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func (gc *garbageCollector) close() {
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gc.stopOnce.Do(func() {
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close(gc.closeCh)
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gc.wg.Wait()
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})
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}
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// scan load meta file info and compares OSS keys
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// if missing found, performs gc cleanup
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func (gc *garbageCollector) scan() {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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var (
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total = 0
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valid = 0
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missing = 0
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segmentMap = typeutil.NewUniqueSet()
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filesMap = typeutil.NewSet[string]()
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)
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segments := gc.meta.GetAllSegmentsUnsafe()
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for _, segment := range segments {
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segmentMap.Insert(segment.GetID())
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for _, log := range getLogs(segment) {
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filesMap.Insert(log.GetLogPath())
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}
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}
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// walk only data cluster related prefixes
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prefixes := make([]string, 0, 3)
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prefixes = append(prefixes, path.Join(gc.option.cli.RootPath(), insertLogPrefix))
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prefixes = append(prefixes, path.Join(gc.option.cli.RootPath(), statsLogPrefix))
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prefixes = append(prefixes, path.Join(gc.option.cli.RootPath(), deltaLogPrefix))
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var removedKeys []string
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for _, prefix := range prefixes {
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infoKeys, modTimes, err := gc.option.cli.ListWithPrefix(ctx, prefix, true)
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if err != nil {
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log.Error("failed to list files with prefix",
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zap.String("prefix", prefix),
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zap.String("error", err.Error()),
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)
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}
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for i, infoKey := range infoKeys {
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total++
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_, has := filesMap[infoKey]
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if has {
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valid++
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continue
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}
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segmentID, err := storage.ParseSegmentIDByBinlog(gc.option.cli.RootPath(), infoKey)
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if err != nil {
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missing++
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log.Warn("parse segment id error",
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zap.String("infoKey", infoKey),
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zap.Error(err))
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continue
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}
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if gc.segRefer.HasSegmentLock(segmentID) {
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valid++
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continue
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}
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if strings.Contains(prefix, statsLogPrefix) &&
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segmentMap.Contain(segmentID) {
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valid++
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continue
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}
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// not found in meta, check last modified time exceeds tolerance duration
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if time.Since(modTimes[i]) > gc.option.missingTolerance {
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// ignore error since it could be cleaned up next time
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removedKeys = append(removedKeys, infoKey)
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err = gc.option.cli.Remove(ctx, infoKey)
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if err != nil {
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missing++
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log.Error("failed to remove object",
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zap.String("infoKey", infoKey),
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zap.Error(err))
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}
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}
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}
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}
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log.Info("scan file to do garbage collection",
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zap.Int("total", total),
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zap.Int("valid", valid),
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zap.Int("missing", missing),
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zap.Strings("removedKeys", removedKeys))
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}
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func (gc *garbageCollector) clearEtcd() {
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all := gc.meta.SelectSegments(func(si *SegmentInfo) bool { return true })
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drops := make(map[int64]*SegmentInfo, 0)
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compactTo := make(map[int64]*SegmentInfo)
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for _, segment := range all {
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if segment.GetState() == commonpb.SegmentState_Dropped && !gc.segRefer.HasSegmentLock(segment.ID) {
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drops[segment.GetID()] = segment
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continue
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}
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for _, from := range segment.GetCompactionFrom() {
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compactTo[from] = segment
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}
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}
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droppedCompactTo := make(map[*SegmentInfo]struct{})
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for id := range drops {
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if to, ok := compactTo[id]; ok {
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droppedCompactTo[to] = struct{}{}
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}
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}
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indexedSegments := FilterInIndexedSegments(gc.handler, gc.indexCoord, lo.Keys(droppedCompactTo)...)
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indexedSet := make(typeutil.UniqueSet)
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for _, segment := range indexedSegments {
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indexedSet.Insert(segment.GetID())
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}
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for _, segment := range drops {
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if !gc.isExpire(segment.GetDroppedAt()) {
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continue
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}
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// For compact A, B -> C, don't GC A or B if C is not indexed,
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// guarantee replacing A, B with C won't downgrade performance
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if to, ok := compactTo[segment.GetID()]; ok && !indexedSet.Contain(to.GetID()) {
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continue
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}
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logs := getLogs(segment)
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log.Info("GC segment",
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zap.Int64("segmentID", segment.GetID()))
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if gc.removeLogs(logs) {
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_ = gc.meta.DropSegment(segment.GetID())
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}
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}
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}
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func (gc *garbageCollector) isExpire(dropts Timestamp) bool {
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droptime := time.Unix(0, int64(dropts))
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return time.Since(droptime) > gc.option.dropTolerance
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}
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func getLogs(sinfo *SegmentInfo) []*datapb.Binlog {
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var logs []*datapb.Binlog
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for _, flog := range sinfo.GetBinlogs() {
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logs = append(logs, flog.GetBinlogs()...)
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}
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for _, flog := range sinfo.GetStatslogs() {
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logs = append(logs, flog.GetBinlogs()...)
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}
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for _, flog := range sinfo.GetDeltalogs() {
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logs = append(logs, flog.GetBinlogs()...)
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}
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return logs
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}
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func (gc *garbageCollector) removeLogs(logs []*datapb.Binlog) bool {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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delFlag := true
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for _, l := range logs {
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err := gc.option.cli.Remove(ctx, l.GetLogPath())
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if err != nil {
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switch err.(type) {
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case minio.ErrorResponse:
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errResp := minio.ToErrorResponse(err)
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if errResp.Code != "" && errResp.Code != "NoSuchKey" {
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delFlag = false
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}
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default:
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delFlag = false
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}
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}
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}
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return delFlag
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}
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