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https://gitee.com/milvus-io/milvus.git
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97 lines
3.4 KiB
Go
97 lines
3.4 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 datanode
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import (
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"math"
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"sort"
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"time"
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"github.com/samber/lo"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/util/tsoutil"
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)
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const minSyncSize = 0.5 * 1024 * 1024
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// segmentsSyncPolicy sync policy applies to segments
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type segmentSyncPolicy func(segments []*Segment, c Channel, ts Timestamp) []UniqueID
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// syncPeriodically get segmentSyncPolicy with segments sync periodically.
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func syncPeriodically() segmentSyncPolicy {
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return func(segments []*Segment, c Channel, ts Timestamp) []UniqueID {
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segmentsToSync := make([]UniqueID, 0)
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for _, seg := range segments {
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endPosTime := tsoutil.PhysicalTime(ts)
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minBufferTime := tsoutil.PhysicalTime(seg.minBufferTs())
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shouldSync := endPosTime.Sub(minBufferTime) >= Params.DataNodeCfg.SyncPeriod.GetAsDuration(time.Second)
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if shouldSync {
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segmentsToSync = append(segmentsToSync, seg.segmentID)
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}
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}
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if len(segmentsToSync) > 0 {
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log.Info("sync segment periodically", zap.Int64s("segmentIDs", segmentsToSync))
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}
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return segmentsToSync
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}
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}
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// syncMemoryTooHigh force sync the largest segment.
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func syncMemoryTooHigh() segmentSyncPolicy {
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return func(segments []*Segment, c Channel, _ Timestamp) []UniqueID {
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if len(segments) == 0 || !c.getIsHighMemory() {
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return nil
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}
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sort.Slice(segments, func(i, j int) bool {
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return segments[i].memorySize > segments[j].memorySize
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})
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syncSegments := make([]UniqueID, 0)
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syncSegmentsNum := math.Min(float64(Params.DataNodeCfg.MemoryForceSyncSegmentNum.GetAsInt()), float64(len(segments)))
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for i := 0; i < int(syncSegmentsNum); i++ {
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if segments[i].memorySize < minSyncSize { // prevent generating too many small binlogs
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break
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}
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syncSegments = append(syncSegments, segments[i].segmentID)
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log.Info("sync segment due to memory usage is too high",
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zap.Int64("segmentID", segments[i].segmentID),
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zap.Int64("memorySize", segments[i].memorySize))
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}
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return syncSegments
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}
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}
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// syncSegmentsAtTs returns a new segmentSyncPolicy, sync segments when ts exceeds ChannelMeta.flushTs
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func syncSegmentsAtTs() segmentSyncPolicy {
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return func(segments []*Segment, c Channel, ts Timestamp) []UniqueID {
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flushTs := c.getFlushTs()
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if flushTs != 0 && ts >= flushTs {
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segmentsWithBuffer := lo.Filter(segments, func(segment *Segment, _ int) bool {
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return !segment.isBufferEmpty()
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})
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segmentIDs := lo.Map(segmentsWithBuffer, func(segment *Segment, _ int) UniqueID {
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return segment.segmentID
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})
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log.Info("sync segment at ts", zap.Int64s("segmentIDs", segmentIDs),
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zap.Time("ts", tsoutil.PhysicalTime(ts)), zap.Time("flushTs", tsoutil.PhysicalTime(flushTs)))
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return segmentIDs
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}
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return nil
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}
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}
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