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https://gitee.com/milvus-io/milvus.git
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276 lines
8.8 KiB
Go
276 lines
8.8 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 querynode
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import (
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"context"
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"errors"
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"fmt"
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"sync"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/metrics"
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"github.com/milvus-io/milvus/internal/proto/segcorepb"
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"github.com/milvus-io/milvus/internal/storage"
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"github.com/milvus-io/milvus/internal/util/timerecord"
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)
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// historical is in charge of historical data in query node
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type historical struct {
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ctx context.Context
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replica ReplicaInterface
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tSafeReplica TSafeReplicaInterface
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}
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// newHistorical returns a new historical
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func newHistorical(ctx context.Context,
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replica ReplicaInterface,
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tSafeReplica TSafeReplicaInterface) *historical {
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return &historical{
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ctx: ctx,
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replica: replica,
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tSafeReplica: tSafeReplica,
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}
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}
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// close would release all resources in historical
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func (h *historical) close() {
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// free collectionReplica
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h.replica.freeAll()
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}
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// // retrieve will retrieve from the segments in historical
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func (h *historical) retrieve(collID UniqueID, partIDs []UniqueID, vcm storage.ChunkManager,
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plan *RetrievePlan) (retrieveResults []*segcorepb.RetrieveResults, retrieveSegmentIDs []UniqueID, retrievePartIDs []UniqueID, err error) {
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// get historical partition ids
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retrievePartIDs, err = h.getTargetPartIDs(collID, partIDs)
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if err != nil {
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return retrieveResults, retrieveSegmentIDs, retrievePartIDs, err
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}
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log.Debug("retrieve target partitions", zap.Int64("collectionID", collID), zap.Int64s("partitionIDs", retrievePartIDs))
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for _, partID := range retrievePartIDs {
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segIDs, err := h.replica.getSegmentIDs(partID)
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if err != nil {
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return retrieveResults, retrieveSegmentIDs, retrievePartIDs, err
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}
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for _, segID := range segIDs {
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seg, err := h.replica.getSegmentByID(segID)
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if err != nil {
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return retrieveResults, retrieveSegmentIDs, retrievePartIDs, err
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}
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result, err := seg.retrieve(plan)
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if err != nil {
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return retrieveResults, retrieveSegmentIDs, retrievePartIDs, err
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}
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if err = seg.fillIndexedFieldsData(collID, vcm, result); err != nil {
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return retrieveResults, retrieveSegmentIDs, retrievePartIDs, err
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}
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retrieveResults = append(retrieveResults, result)
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retrieveSegmentIDs = append(retrieveSegmentIDs, segID)
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}
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}
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return retrieveResults, retrieveSegmentIDs, retrievePartIDs, nil
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}
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// retrieveBySegmentIDs retrieves records from segments specified by their IDs
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func (h *historical) retrieveBySegmentIDs(collID UniqueID, segmentIDs []UniqueID, vcm storage.ChunkManager, plan *RetrievePlan) (
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retrieveResults []*segcorepb.RetrieveResults, err error) {
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for _, segID := range segmentIDs {
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seg, err := h.replica.getSegmentByID(segID)
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if err != nil {
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return nil, err
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}
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result, err := seg.retrieve(plan)
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if err != nil {
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return nil, err
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}
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err = seg.fillIndexedFieldsData(collID, vcm, result)
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if err != nil {
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return nil, err
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}
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retrieveResults = append(retrieveResults, result)
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}
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return retrieveResults, nil
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}
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// search will search all the target segments in historical
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func (h *historical) search(searchReqs []*searchRequest, collID UniqueID, partIDs []UniqueID, plan *SearchPlan,
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searchTs Timestamp) (searchResults []*SearchResult, searchSegmentIDs []UniqueID, searchPartIDs []UniqueID, err error) {
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searchPartIDs, err = h.getTargetPartIDs(collID, partIDs)
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if err != nil {
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return searchResults, searchSegmentIDs, searchPartIDs, err
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}
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log.Debug("search target partitions", zap.Int64("collectionID", collID), zap.Int64s("partitionIDs", searchPartIDs))
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col, err := h.replica.getCollectionByID(collID)
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if err != nil {
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return searchResults, searchSegmentIDs, searchPartIDs, err
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}
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// all partitions have been released
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if len(searchPartIDs) == 0 && col.getLoadType() == loadTypePartition {
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return nil, nil, searchPartIDs, errors.New("partitions have been released , collectionID = " +
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fmt.Sprintln(collID) + "target partitionIDs = " + fmt.Sprintln(partIDs))
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}
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if len(searchPartIDs) == 0 && col.getLoadType() == loadTypeCollection {
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return searchResults, searchSegmentIDs, searchPartIDs, nil
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}
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var segmentIDs []UniqueID
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for _, partID := range searchPartIDs {
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segIDs, err := h.replica.getSegmentIDs(partID)
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if err != nil {
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return searchResults, searchSegmentIDs, searchPartIDs, err
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}
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segmentIDs = append(segmentIDs, segIDs...)
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}
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searchResults, searchSegmentIDs, err = h.searchSegments(segmentIDs, searchReqs, plan, searchTs)
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return searchResults, searchSegmentIDs, searchPartIDs, err
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}
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// validateSegmentIDs checks segments if their collection/partition(s) have been released
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func (h *historical) validateSegmentIDs(segmentIDs []UniqueID, collectionID UniqueID, partitionIDs []UniqueID) (err error) {
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// validate partitionIDs
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validatedPartitionIDs, err := h.getTargetPartIDs(collectionID, partitionIDs)
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if err != nil {
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return
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}
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log.Debug("search validated partitions", zap.Int64("collectionID", collectionID), zap.Int64s("partitionIDs", validatedPartitionIDs))
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col, err := h.replica.getCollectionByID(collectionID)
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if err != nil {
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return
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}
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// return if no partitions are loaded currently
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if len(validatedPartitionIDs) == 0 {
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switch col.getLoadType() {
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case loadTypeCollection:
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err = fmt.Errorf("partitions have been released, collectionID = %d, target paritition= %v", collectionID, partitionIDs)
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case loadTypePartition:
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err = fmt.Errorf("collection has been released, collectionID = %d, target paritition= %v", collectionID, partitionIDs)
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default:
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err = fmt.Errorf("got unknown loadType %d", col.getLoadType())
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}
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return
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}
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for _, segmentID := range segmentIDs {
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var segment *Segment
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if segment, err = h.replica.getSegmentByID(segmentID); err != nil {
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return
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}
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if !inList(validatedPartitionIDs, segment.partitionID) {
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err = fmt.Errorf("segment %d belongs to partition %d, which is not in %v", segmentID, segment.partitionID, validatedPartitionIDs)
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return
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}
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}
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return
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}
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// getSearchPartIDs fetches the partition ids to search from the request ids
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func (h *historical) getTargetPartIDs(collID UniqueID, partIDs []UniqueID) ([]UniqueID, error) {
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// no partition id specified, get all partition ids in collection
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if len(partIDs) == 0 {
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return h.replica.getPartitionIDs(collID)
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}
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var targetPartIDs []UniqueID
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for _, id := range partIDs {
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_, err := h.replica.getPartitionByID(id)
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if err != nil {
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return nil, err
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}
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targetPartIDs = append(targetPartIDs, id)
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}
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return targetPartIDs, nil
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}
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// searchSegments performs search on listed segments
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// all segment ids are validated before calling this function
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func (h *historical) searchSegments(segIDs []UniqueID, searchReqs []*searchRequest, plan *SearchPlan, searchTs Timestamp) ([]*SearchResult, []UniqueID, error) {
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// pre-fetch all the segment
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// if error found, return before executing segment search
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segments := make([]*Segment, 0, len(segIDs))
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for _, segID := range segIDs {
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seg, err := h.replica.getSegmentByID(segID)
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if err != nil {
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return nil, nil, err
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}
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segments = append(segments, seg)
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}
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// results variables
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var searchResults []*SearchResult
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var searchSegmentIDs []UniqueID
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var lock sync.Mutex
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var serr error
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// calling segment search in goroutines
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var wg sync.WaitGroup
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for _, seg := range segments {
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wg.Add(1)
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go func(seg *Segment) {
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defer wg.Done()
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if !seg.getOnService() {
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log.Warn("segment no on service", zap.Int64("segmentID", seg.segmentID))
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return
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}
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// record search time
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tr := timerecord.NewTimeRecorder("searchOnSealed")
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searchResult, err := seg.search(plan, searchReqs, []Timestamp{searchTs})
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// update metrics
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metrics.QueryNodeSQSegmentLatency.WithLabelValues(fmt.Sprint(Params.QueryNodeCfg.GetNodeID()),
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metrics.SearchLabel,
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metrics.SealedSegmentLabel).Observe(float64(tr.ElapseSpan().Milliseconds()))
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// write back result into list
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lock.Lock()
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defer lock.Unlock()
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if err != nil {
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serr = err
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return
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}
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searchResults = append(searchResults, searchResult)
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searchSegmentIDs = append(searchSegmentIDs, seg.segmentID)
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}(seg)
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}
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wg.Wait()
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if serr != nil {
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return nil, nil, serr
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}
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return searchResults, searchSegmentIDs, nil
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}
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