mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-06 05:49:24 +08:00
7b870e3392
Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
195 lines
5.4 KiB
Go
195 lines
5.4 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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"sync"
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"time"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/commonpb"
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"github.com/minio/minio-go/v7"
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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 *minio.Client // OSS 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 tolerace time
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dropTolerance time.Duration // dropped segment related key tolerance time
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bucketName string
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rootPath string
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}
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// garbageCollector handles garbage files in object storage
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// which could be dropped collection remnant 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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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, 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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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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var v, m, e int
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valid := gc.meta.ListSegmentFiles()
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vm := make(map[string]struct{})
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for _, k := range valid {
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vm[k] = struct{}{}
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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.rootPath, insertLogPrefix))
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prefixes = append(prefixes, path.Join(gc.option.rootPath, statsLogPrefix))
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prefixes = append(prefixes, path.Join(gc.option.rootPath, deltaLogPrefix))
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for _, prefix := range prefixes {
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for info := range gc.option.cli.ListObjects(context.TODO(), gc.option.bucketName, minio.ListObjectsOptions{
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Prefix: prefix,
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Recursive: true,
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}) {
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_, has := vm[info.Key]
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if has {
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v++
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continue
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}
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m++
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// not found in meta, check last modified time exceeds tolerance duration
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if time.Since(info.LastModified) > gc.option.missingTolerance {
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e++
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// ignore error since it could be cleaned up next time
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_ = gc.option.cli.RemoveObject(context.TODO(), gc.option.bucketName, info.Key, minio.RemoveObjectOptions{})
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}
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}
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}
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log.Warn("scan result", zap.Int("valid", v), zap.Int("missing", m), zap.Int("removed", e))
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}
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func (gc *garbageCollector) clearEtcd() {
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drops := gc.meta.SelectSegments(func(segment *SegmentInfo) bool {
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return segment.GetState() == commonpb.SegmentState_Dropped
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})
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for _, sinfo := range drops {
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if !gc.isExpire(sinfo.GetDroppedAt()) {
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continue
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}
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logs := getLogs(sinfo)
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if gc.removeLogs(logs) {
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_ = gc.meta.DropSegment(sinfo.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) []string {
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var logs []string
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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 _, dlog := range sinfo.GetDeltalogs() {
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logs = append(logs, dlog.GetDeltaLogPath())
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}
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return logs
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}
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func (gc *garbageCollector) removeLogs(logs []string) bool {
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delFlag := true
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for _, l := range logs {
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err := gc.option.cli.RemoveObject(context.TODO(), gc.option.bucketName, l, minio.RemoveObjectOptions{})
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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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}
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return delFlag
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}
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