mirror of
https://gitee.com/milvus-io/milvus.git
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561 lines
17 KiB
Go
561 lines
17 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 indexcoord
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import (
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"context"
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"errors"
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"fmt"
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"strconv"
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"sync"
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"github.com/milvus-io/milvus/internal/metrics"
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"go.uber.org/zap"
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"github.com/golang/protobuf/proto"
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etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
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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/milvus-io/milvus/internal/proto/indexpb"
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"github.com/milvus-io/milvus/internal/util/retry"
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)
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// Meta is used to record the state of the index.
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// revision: The number of times IndexMeta has been changed in etcd. It's the same as Event.Kv.Version in etcd.
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// indexMeta: A structure that records the state of the index defined by proto.
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type Meta struct {
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indexMeta *indexpb.IndexMeta
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revision int64
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}
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// metaTable records the mapping of IndexBuildID to Meta.
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type metaTable struct {
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client *etcdkv.EtcdKV // client of a reliable kv service, i.e. etcd client
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indexBuildID2Meta map[UniqueID]Meta // index build id to index meta
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lock sync.RWMutex
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}
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// NewMetaTable is used to create a new meta table.
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func NewMetaTable(kv *etcdkv.EtcdKV) (*metaTable, error) {
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mt := &metaTable{
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client: kv,
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lock: sync.RWMutex{},
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}
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err := mt.reloadFromKV()
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if err != nil {
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return nil, err
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}
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return mt, nil
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}
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// reloadFromKV reloads the index meta from ETCD.
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func (mt *metaTable) reloadFromKV() error {
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mt.indexBuildID2Meta = make(map[UniqueID]Meta)
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key := "indexes"
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log.Debug("IndexCoord metaTable LoadWithPrefix ", zap.String("prefix", key))
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_, values, versions, err := mt.client.LoadWithPrefix2(key)
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if err != nil {
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return err
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}
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for i := 0; i < len(values); i++ {
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indexMeta := indexpb.IndexMeta{}
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err = proto.Unmarshal([]byte(values[i]), &indexMeta)
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if err != nil {
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return fmt.Errorf("IndexCoord metaTable reloadFromKV UnmarshalText indexpb.IndexMeta err:%w", err)
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}
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meta := &Meta{
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indexMeta: &indexMeta,
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revision: versions[i],
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}
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mt.indexBuildID2Meta[indexMeta.IndexBuildID] = *meta
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}
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return nil
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}
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// saveIndexMeta saves the index meta to ETCD.
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// metaTable.lock.Lock() before call this function
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func (mt *metaTable) saveIndexMeta(meta *Meta) error {
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value, err := proto.Marshal(meta.indexMeta)
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if err != nil {
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return err
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}
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key := "indexes/" + strconv.FormatInt(meta.indexMeta.IndexBuildID, 10)
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err = mt.client.CompareVersionAndSwap(key, meta.revision, string(value))
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log.Debug("IndexCoord metaTable saveIndexMeta ", zap.String("key", key), zap.Error(err))
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if err != nil {
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return err
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}
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meta.revision = meta.revision + 1
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mt.indexBuildID2Meta[meta.indexMeta.IndexBuildID] = *meta
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log.Debug("IndexCoord metaTable saveIndexMeta success", zap.Any("meta.revision", meta.revision))
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return nil
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}
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// reloadMeta reloads the index meta corresponding indexBuildID from ETCD.
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func (mt *metaTable) reloadMeta(indexBuildID UniqueID) (*Meta, error) {
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key := "indexes/" + strconv.FormatInt(indexBuildID, 10)
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_, values, version, err := mt.client.LoadWithPrefix2(key)
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log.Debug("IndexCoord reloadMeta mt.client.LoadWithPrefix2", zap.Any("indexBuildID", indexBuildID), zap.Error(err))
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if err != nil {
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return nil, err
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}
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if len(values) == 0 {
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log.Error("IndexCoord reload Meta", zap.Any("indexBuildID", indexBuildID), zap.Error(errors.New("meta doesn't exist in KV")))
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return nil, errors.New("meta doesn't exist in KV")
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}
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im := &indexpb.IndexMeta{}
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err = proto.Unmarshal([]byte(values[0]), im)
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if err != nil {
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return nil, err
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}
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//if im.State == commonpb.IndexState_Finished {
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// return nil, nil
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//}
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m := &Meta{
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revision: version[0],
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indexMeta: im,
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}
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return m, nil
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}
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// AddIndex adds the index meta corresponding the indexBuildID to meta table.
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func (mt *metaTable) AddIndex(indexBuildID UniqueID, req *indexpb.BuildIndexRequest) error {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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_, ok := mt.indexBuildID2Meta[indexBuildID]
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log.Debug("IndexCoord metaTable AddIndex", zap.Any("indexBuildID", indexBuildID), zap.Any(" index already exist", ok))
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if ok {
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return fmt.Errorf("index already exists with ID = %d", indexBuildID)
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}
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meta := &Meta{
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indexMeta: &indexpb.IndexMeta{
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State: commonpb.IndexState_Unissued,
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IndexBuildID: indexBuildID,
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Req: req,
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NodeID: 0,
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Version: 0,
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},
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revision: 0,
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}
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metrics.IndexCoordIndexTaskCounter.WithLabelValues(metrics.UnissuedIndexTaskLabel).Inc()
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return mt.saveIndexMeta(meta)
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}
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// BuildIndex set the index state to be InProgress. It means IndexNode is building the index.
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func (mt *metaTable) BuildIndex(indexBuildID UniqueID, nodeID int64) error {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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log.Debug("IndexCoord metaTable BuildIndex")
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meta, ok := mt.indexBuildID2Meta[indexBuildID]
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if !ok {
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log.Error("IndexCoord metaTable BuildIndex index not exists", zap.Any("indexBuildID", indexBuildID))
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return fmt.Errorf("index not exists with ID = %d", indexBuildID)
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}
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//if meta.indexMeta.State != commonpb.IndexState_Unissued {
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// return fmt.Errorf("can not set lease key, index with ID = %d state is %d", indexBuildID, meta.indexMeta.State)
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//}
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if meta.indexMeta.State == commonpb.IndexState_Finished || meta.indexMeta.State == commonpb.IndexState_Failed {
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log.Debug("This index task has been finished", zap.Int64("indexBuildID", indexBuildID),
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zap.Any("index state", meta.indexMeta.State))
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return nil
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}
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meta.indexMeta.NodeID = nodeID
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meta.indexMeta.State = commonpb.IndexState_InProgress
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metrics.IndexCoordIndexTaskCounter.WithLabelValues(metrics.UnissuedIndexTaskLabel).Dec()
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metrics.IndexCoordIndexTaskCounter.WithLabelValues(metrics.InProgressIndexTaskLabel).Inc()
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err := mt.saveIndexMeta(&meta)
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if err != nil {
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fn := func() error {
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m, err := mt.reloadMeta(meta.indexMeta.IndexBuildID)
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if m == nil {
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return err
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}
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m.indexMeta.NodeID = nodeID
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return mt.saveIndexMeta(m)
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}
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err2 := retry.Do(context.TODO(), fn, retry.Attempts(5))
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if err2 != nil {
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return err2
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}
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}
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return nil
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}
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// UpdateVersion updates the version of the index meta, whenever the task is built once, the version will be updated once.
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func (mt *metaTable) UpdateVersion(indexBuildID UniqueID) error {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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log.Debug("IndexCoord metaTable update UpdateVersion", zap.Any("IndexBuildId", indexBuildID))
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meta, ok := mt.indexBuildID2Meta[indexBuildID]
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if !ok {
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log.Warn("IndexCoord metaTable update UpdateVersion indexBuildID not exists", zap.Any("IndexBuildId", indexBuildID))
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return fmt.Errorf("index not exists with ID = %d", indexBuildID)
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}
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//if meta.indexMeta.State != commonpb.IndexState_Unissued {
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// return fmt.Errorf("can not set lease key, index with ID = %d state is %d", indexBuildID, meta.indexMeta.State)
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//}
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meta.indexMeta.Version = meta.indexMeta.Version + 1
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log.Debug("IndexCoord metaTable update UpdateVersion", zap.Any("IndexBuildId", indexBuildID),
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zap.Any("Version", meta.indexMeta.Version))
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err := mt.saveIndexMeta(&meta)
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if err != nil {
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fn := func() error {
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m, err := mt.reloadMeta(meta.indexMeta.IndexBuildID)
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if m == nil {
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return err
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}
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m.indexMeta.Version = m.indexMeta.Version + 1
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return mt.saveIndexMeta(m)
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}
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err2 := retry.Do(context.TODO(), fn, retry.Attempts(5))
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return err2
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}
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return nil
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}
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// MarkIndexAsDeleted will mark the corresponding index as deleted, and recycleUnusedIndexFiles will recycle these tasks.
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func (mt *metaTable) MarkIndexAsDeleted(indexID UniqueID) error {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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log.Debug("IndexCoord metaTable MarkIndexAsDeleted ", zap.Int64("indexID", indexID))
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for _, meta := range mt.indexBuildID2Meta {
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if meta.indexMeta.Req.IndexID == indexID && !meta.indexMeta.MarkDeleted {
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meta.indexMeta.MarkDeleted = true
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// marshal inside
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/* #nosec G601 */
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if err := mt.saveIndexMeta(&meta); err != nil {
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log.Error("IndexCoord metaTable MarkIndexAsDeleted saveIndexMeta failed", zap.Error(err))
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fn := func() error {
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m, err := mt.reloadMeta(meta.indexMeta.IndexBuildID)
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if m == nil {
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return err
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}
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m.indexMeta.MarkDeleted = true
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return mt.saveIndexMeta(m)
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}
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err2 := retry.Do(context.TODO(), fn, retry.Attempts(5))
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if err2 != nil {
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return err2
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}
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}
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}
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}
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return nil
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}
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// GetIndexStates gets the index states from meta table.
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func (mt *metaTable) GetIndexStates(indexBuildIDs []UniqueID) []*indexpb.IndexInfo {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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log.Debug("IndexCoord get index states from meta table", zap.Int64s("indexBuildIDs", indexBuildIDs))
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var indexStates []*indexpb.IndexInfo
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for _, id := range indexBuildIDs {
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state := &indexpb.IndexInfo{
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IndexBuildID: id,
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}
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meta, ok := mt.indexBuildID2Meta[id]
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if !ok {
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state.Reason = fmt.Sprintf("index %d not exists", id)
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} else if meta.indexMeta.MarkDeleted {
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state.Reason = fmt.Sprintf("index %d has been deleted", id)
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} else {
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state.State = meta.indexMeta.State
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state.IndexID = meta.indexMeta.Req.IndexID
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state.IndexName = meta.indexMeta.Req.IndexName
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state.Reason = meta.indexMeta.FailReason
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}
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indexStates = append(indexStates, state)
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}
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return indexStates
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}
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// GetIndexFilePathInfo gets the index file paths from meta table.
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func (mt *metaTable) GetIndexFilePathInfo(indexBuildID UniqueID) (*indexpb.IndexFilePathInfo, error) {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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log.Debug("IndexCoord get index file path from meta table", zap.Int64("indexBuildID", indexBuildID))
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ret := &indexpb.IndexFilePathInfo{
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IndexBuildID: indexBuildID,
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}
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meta, ok := mt.indexBuildID2Meta[indexBuildID]
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if !ok {
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return nil, fmt.Errorf("index not exists with ID = %d", indexBuildID)
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}
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if meta.indexMeta.MarkDeleted {
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return nil, fmt.Errorf("index not exists with ID = %d", indexBuildID)
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}
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ret.IndexFilePaths = meta.indexMeta.IndexFilePaths
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ret.SerializedSize = meta.indexMeta.GetSerializeSize()
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log.Debug("IndexCoord get index file path successfully", zap.Int64("indexBuildID", indexBuildID),
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zap.Int("index files num", len(ret.IndexFilePaths)))
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return ret, nil
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}
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// DeleteIndex delete the index meta from meta table.
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func (mt *metaTable) DeleteIndex(indexBuildID UniqueID) {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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delete(mt.indexBuildID2Meta, indexBuildID)
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key := "indexes/" + strconv.FormatInt(indexBuildID, 10)
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if err := mt.client.Remove(key); err != nil {
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log.Error("IndexCoord delete index meta from etcd failed", zap.Error(err))
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}
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log.Debug("IndexCoord delete index meta successfully", zap.Int64("indexBuildID", indexBuildID))
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}
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// UpdateRecycleState update the recycle state corresponding the indexBuildID,
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// when the recycle state is true, means the index files has been recycled with lower version.
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func (mt *metaTable) UpdateRecycleState(indexBuildID UniqueID) error {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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meta, ok := mt.indexBuildID2Meta[indexBuildID]
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log.Debug("IndexCoord metaTable UpdateRecycleState", zap.Any("indexBuildID", indexBuildID),
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zap.Any("exists", ok))
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if !ok {
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return fmt.Errorf("index not exists with ID = %d", indexBuildID)
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}
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if meta.indexMeta.Recycled {
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return nil
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}
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meta.indexMeta.Recycled = true
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if err := mt.saveIndexMeta(&meta); err != nil {
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fn := func() error {
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m, err := mt.reloadMeta(meta.indexMeta.IndexBuildID)
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if m == nil {
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return err
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}
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m.indexMeta.Recycled = true
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return mt.saveIndexMeta(m)
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}
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err2 := retry.Do(context.TODO(), fn, retry.Attempts(5))
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if err2 != nil {
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meta.indexMeta.Recycled = false
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log.Error("IndexCoord metaTable UpdateRecycleState failed", zap.Error(err2))
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return err2
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}
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}
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return nil
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}
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// GetUnusedIndexFiles get the index files with lower version or corresponding the indexBuildIDs which has been deleted.
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func (mt *metaTable) GetUnusedIndexFiles(limit int) []Meta {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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var metas []Meta
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for _, meta := range mt.indexBuildID2Meta {
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if meta.indexMeta.State == commonpb.IndexState_Finished && (meta.indexMeta.MarkDeleted || !meta.indexMeta.Recycled) {
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metas = append(metas, Meta{indexMeta: proto.Clone(meta.indexMeta).(*indexpb.IndexMeta), revision: meta.revision})
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}
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if len(metas) >= limit {
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return metas
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}
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}
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return metas
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}
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// GetUnassignedTasks get the unassigned tasks.
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func (mt *metaTable) GetUnassignedTasks(onlineNodeIDs []int64) []Meta {
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mt.lock.RLock()
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defer mt.lock.RUnlock()
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var metas []Meta
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for _, meta := range mt.indexBuildID2Meta {
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if meta.indexMeta.State == commonpb.IndexState_Unissued {
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metas = append(metas, Meta{indexMeta: proto.Clone(meta.indexMeta).(*indexpb.IndexMeta), revision: meta.revision})
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continue
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}
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if meta.indexMeta.State == commonpb.IndexState_Finished || meta.indexMeta.State == commonpb.IndexState_Failed {
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continue
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}
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alive := false
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for _, serverID := range onlineNodeIDs {
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if meta.indexMeta.NodeID == serverID {
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alive = true
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break
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}
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}
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if !alive {
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log.Info("Reassign because node no longer alive", zap.Any("onlineID", onlineNodeIDs), zap.Int64("nodeID", meta.indexMeta.NodeID))
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metas = append(metas, Meta{indexMeta: proto.Clone(meta.indexMeta).(*indexpb.IndexMeta), revision: meta.revision})
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}
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}
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return metas
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}
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// HasSameReq determine whether there are same indexing tasks.
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func (mt *metaTable) HasSameReq(req *indexpb.BuildIndexRequest) (bool, UniqueID) {
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mt.lock.Lock()
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defer mt.lock.Unlock()
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log.Debug("IndexCoord judges whether the same task exists in meta table", zap.Int64("indexBuildID", req.IndexBuildID),
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zap.Int64("indexID", req.IndexID), zap.Any("index params", req.IndexParams),
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zap.Any("type params", req.TypeParams))
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for _, meta := range mt.indexBuildID2Meta {
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if meta.indexMeta.Req.IndexID != req.IndexID {
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continue
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}
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if meta.indexMeta.Req.IndexName != req.IndexName {
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continue
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}
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if len(meta.indexMeta.Req.DataPaths) != len(req.DataPaths) {
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continue
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}
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notEq := false
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for i := range meta.indexMeta.Req.DataPaths {
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if meta.indexMeta.Req.DataPaths[i] != req.DataPaths[i] {
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notEq = true
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break
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}
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}
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if notEq {
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continue
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}
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if len(meta.indexMeta.Req.TypeParams) != len(req.TypeParams) {
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continue
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}
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notEq = false
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for i := range meta.indexMeta.Req.TypeParams {
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if meta.indexMeta.Req.TypeParams[i].Key != req.TypeParams[i].Key {
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notEq = true
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break
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}
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if meta.indexMeta.Req.TypeParams[i].Value != req.TypeParams[i].Value {
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notEq = true
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break
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}
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}
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if notEq {
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continue
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}
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if len(meta.indexMeta.Req.IndexParams) != len(req.IndexParams) {
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continue
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}
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notEq = false
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for i := range meta.indexMeta.Req.IndexParams {
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if meta.indexMeta.Req.IndexParams[i].Key != req.IndexParams[i].Key {
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notEq = true
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break
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}
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if meta.indexMeta.Req.IndexParams[i].Value != req.IndexParams[i].Value {
|
|
notEq = true
|
|
break
|
|
}
|
|
}
|
|
if notEq {
|
|
continue
|
|
}
|
|
return true, meta.indexMeta.IndexBuildID
|
|
}
|
|
|
|
return false, -1
|
|
}
|
|
|
|
// LoadMetaFromETCD load the meta of specified indexBuildID from ETCD.
|
|
// If the version of meta in memory is greater equal to the version in ETCD, no need to reload.
|
|
func (mt *metaTable) LoadMetaFromETCD(indexBuildID int64, revision int64) bool {
|
|
mt.lock.Lock()
|
|
defer mt.lock.Unlock()
|
|
meta, ok := mt.indexBuildID2Meta[indexBuildID]
|
|
log.Debug("IndexCoord metaTable LoadMetaFromETCD", zap.Int64("indexBuildID", indexBuildID),
|
|
zap.Int64("revision", revision), zap.Bool("ok", ok))
|
|
if ok {
|
|
log.Debug("IndexCoord metaTable LoadMetaFromETCD",
|
|
zap.Int64("meta.revision", meta.revision),
|
|
zap.Int64("revision", revision))
|
|
|
|
if meta.revision >= revision {
|
|
return false
|
|
}
|
|
} else {
|
|
log.Error("Index not exist", zap.Int64("IndexBuildID", indexBuildID))
|
|
return false
|
|
}
|
|
|
|
m, err := mt.reloadMeta(indexBuildID)
|
|
if m == nil {
|
|
log.Error("IndexCoord metaTable reloadMeta failed", zap.Error(err))
|
|
return false
|
|
}
|
|
|
|
mt.indexBuildID2Meta[indexBuildID] = *m
|
|
log.Debug("IndexCoord LoadMetaFromETCD success", zap.Any("IndexMeta", m))
|
|
|
|
return true
|
|
}
|
|
|
|
// GetNodeTaskStats get task stats of IndexNode.
|
|
func (mt *metaTable) GetNodeTaskStats() map[UniqueID]int {
|
|
mt.lock.RLock()
|
|
defer mt.lock.RUnlock()
|
|
|
|
log.Debug("IndexCoord MetaTable GetPriorityForNodeID")
|
|
nodePriority := make(map[UniqueID]int)
|
|
for _, meta := range mt.indexBuildID2Meta {
|
|
if meta.indexMeta.State == commonpb.IndexState_InProgress {
|
|
nodePriority[meta.indexMeta.NodeID]++
|
|
}
|
|
}
|
|
return nodePriority
|
|
}
|
|
|
|
// GetIndexMetaByIndexBuildID get the index meta of the specified indexBuildID.
|
|
func (mt *metaTable) GetIndexMetaByIndexBuildID(indexBuildID UniqueID) *indexpb.IndexMeta {
|
|
mt.lock.RLock()
|
|
defer mt.lock.RUnlock()
|
|
|
|
log.Debug("IndexCoord MetaTable GetIndexMeta", zap.Int64("IndexBuildID", indexBuildID))
|
|
meta, ok := mt.indexBuildID2Meta[indexBuildID]
|
|
if !ok {
|
|
log.Error("IndexCoord MetaTable GetIndexMeta not exist", zap.Int64("IndexBuildID", indexBuildID))
|
|
return nil
|
|
}
|
|
return proto.Clone(meta.indexMeta).(*indexpb.IndexMeta)
|
|
}
|