mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-05 05:18:52 +08:00
aea5a61e9a
Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
447 lines
13 KiB
Go
447 lines
13 KiB
Go
package datacoord
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/milvus-io/milvus/internal/log"
|
|
"github.com/milvus-io/milvus/internal/logutil"
|
|
"github.com/milvus-io/milvus/internal/proto/commonpb"
|
|
"github.com/milvus-io/milvus/internal/proto/datapb"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
const (
|
|
signalBufferSize = 100
|
|
maxLittleSegmentNum = 10
|
|
maxCompactionTimeoutInSeconds = 60
|
|
singleCompactionRatioThreshold = 0.2
|
|
singleCompactionDeltaLogMaxSize = 10 * 1024 * 1024 //10MiB
|
|
globalCompactionInterval = 60 * time.Second
|
|
)
|
|
|
|
type timetravel struct {
|
|
time Timestamp
|
|
}
|
|
|
|
type trigger interface {
|
|
start()
|
|
stop()
|
|
// triggerCompaction trigger a compaction if any compaction condition satisfy.
|
|
triggerCompaction(timetravel *timetravel) error
|
|
// triggerSingleCompaction trigerr a compaction bundled with collection-partiiton-channel-segment
|
|
triggerSingleCompaction(collectionID, partitionID, segmentID int64, channel string, timetravel *timetravel) error
|
|
// forceTriggerCompaction force to start a compaction
|
|
forceTriggerCompaction(collectionID int64, timetravel *timetravel) (UniqueID, error)
|
|
}
|
|
|
|
type compactionSignal struct {
|
|
id UniqueID
|
|
isForce bool
|
|
isGlobal bool
|
|
collectionID UniqueID
|
|
partitionID UniqueID
|
|
segmentID UniqueID
|
|
channel string
|
|
timetravel *timetravel
|
|
}
|
|
|
|
var _ trigger = (*compactionTrigger)(nil)
|
|
|
|
type compactionTrigger struct {
|
|
meta *meta
|
|
allocator allocator
|
|
signals chan *compactionSignal
|
|
singleCompactionPolicy singleCompactionPolicy
|
|
mergeCompactionPolicy mergeCompactionPolicy
|
|
compactionHandler compactionPlanContext
|
|
globalTrigger *time.Ticker
|
|
forceMu sync.Mutex
|
|
mergeCompactionSegmentThreshold int
|
|
quit chan struct{}
|
|
wg sync.WaitGroup
|
|
}
|
|
|
|
func newCompactionTrigger(meta *meta, compactionHandler compactionPlanContext, allocator allocator) *compactionTrigger {
|
|
return &compactionTrigger{
|
|
meta: meta,
|
|
allocator: allocator,
|
|
signals: make(chan *compactionSignal, signalBufferSize),
|
|
singleCompactionPolicy: (singleCompactionFunc)(chooseAllBinlogs),
|
|
mergeCompactionPolicy: (mergeCompactionFunc)(greedyMergeCompaction),
|
|
compactionHandler: compactionHandler,
|
|
mergeCompactionSegmentThreshold: maxLittleSegmentNum,
|
|
}
|
|
}
|
|
|
|
func (t *compactionTrigger) start() {
|
|
t.quit = make(chan struct{})
|
|
t.globalTrigger = time.NewTicker(globalCompactionInterval)
|
|
t.wg.Add(2)
|
|
go func() {
|
|
defer logutil.LogPanic()
|
|
defer t.wg.Done()
|
|
|
|
for {
|
|
select {
|
|
case <-t.quit:
|
|
log.Debug("compaction trigger quit")
|
|
return
|
|
case signal := <-t.signals:
|
|
switch {
|
|
case signal.isGlobal:
|
|
t.handleGlobalSignal(signal)
|
|
default:
|
|
t.handleSignal(signal)
|
|
t.globalTrigger.Reset(globalCompactionInterval)
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
|
|
go t.startGlobalCompactionLoop()
|
|
}
|
|
|
|
func (t *compactionTrigger) startGlobalCompactionLoop() {
|
|
defer logutil.LogPanic()
|
|
defer t.wg.Done()
|
|
|
|
// If AutoCompaction diabled, global loop will not start
|
|
if !Params.EnableAutoCompaction {
|
|
return
|
|
}
|
|
|
|
for {
|
|
select {
|
|
case <-t.quit:
|
|
t.globalTrigger.Stop()
|
|
log.Info("global compaction loop exit")
|
|
return
|
|
case <-t.globalTrigger.C:
|
|
cctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
tt, err := getTimetravelReverseTime(cctx, t.allocator)
|
|
if err != nil {
|
|
log.Warn("unbale to get compaction timetravel", zap.Error(err))
|
|
cancel()
|
|
continue
|
|
}
|
|
cancel()
|
|
t.triggerCompaction(tt)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (t *compactionTrigger) stop() {
|
|
close(t.quit)
|
|
t.wg.Wait()
|
|
}
|
|
|
|
// triggerCompaction trigger a compaction if any compaction condition satisfy.
|
|
func (t *compactionTrigger) triggerCompaction(timetravel *timetravel) error {
|
|
id, err := t.allocSignalID()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
signal := &compactionSignal{
|
|
id: id,
|
|
isForce: false,
|
|
isGlobal: true,
|
|
timetravel: timetravel,
|
|
}
|
|
t.signals <- signal
|
|
return nil
|
|
}
|
|
|
|
// triggerSingleCompaction triger a compaction bundled with collection-partiiton-channel-segment
|
|
func (t *compactionTrigger) triggerSingleCompaction(collectionID, partitionID, segmentID int64, channel string, timetravel *timetravel) error {
|
|
// If AutoCompaction diabled, flush request will not trigger compaction
|
|
if !Params.EnableAutoCompaction {
|
|
return nil
|
|
}
|
|
|
|
id, err := t.allocSignalID()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
signal := &compactionSignal{
|
|
id: id,
|
|
isForce: false,
|
|
isGlobal: false,
|
|
collectionID: collectionID,
|
|
partitionID: partitionID,
|
|
segmentID: segmentID,
|
|
channel: channel,
|
|
timetravel: timetravel,
|
|
}
|
|
t.signals <- signal
|
|
return nil
|
|
}
|
|
|
|
// forceTriggerCompaction force to start a compaction
|
|
func (t *compactionTrigger) forceTriggerCompaction(collectionID int64, timetravel *timetravel) (UniqueID, error) {
|
|
id, err := t.allocSignalID()
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
signal := &compactionSignal{
|
|
id: id,
|
|
isForce: true,
|
|
isGlobal: false,
|
|
collectionID: collectionID,
|
|
timetravel: timetravel,
|
|
}
|
|
t.handleForceSignal(signal)
|
|
return id, nil
|
|
}
|
|
|
|
func (t *compactionTrigger) allocSignalID() (UniqueID, error) {
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
defer cancel()
|
|
return t.allocator.allocID(ctx)
|
|
}
|
|
|
|
func (t *compactionTrigger) handleForceSignal(signal *compactionSignal) {
|
|
t.forceMu.Lock()
|
|
defer t.forceMu.Unlock()
|
|
|
|
t1 := time.Now()
|
|
|
|
segments := t.meta.GetSegmentsOfCollection(signal.collectionID)
|
|
singleCompactionPlans := t.globalSingleCompaction(segments, true, signal)
|
|
if len(singleCompactionPlans) != 0 {
|
|
log.Debug("force single compaction plans", zap.Int64("signalID", signal.id), zap.Int64s("planIDs", getPlanIDs(singleCompactionPlans)))
|
|
}
|
|
|
|
mergeCompactionPlans := t.globalMergeCompaction(signal, true, signal.collectionID)
|
|
if len(mergeCompactionPlans) != 0 {
|
|
log.Debug("force merge compaction plans", zap.Int64("signalID", signal.id), zap.Int64s("planIDs", getPlanIDs(mergeCompactionPlans)))
|
|
}
|
|
log.Info("handle force signal cost", zap.Int64("milliseconds", time.Since(t1).Milliseconds()),
|
|
zap.Int64("collectionID", signal.collectionID), zap.Int64("signalID", signal.id))
|
|
}
|
|
|
|
func getPlanIDs(plans []*datapb.CompactionPlan) []int64 {
|
|
ids := make([]int64, 0, len(plans))
|
|
for _, p := range plans {
|
|
ids = append(ids, p.GetPlanID())
|
|
}
|
|
return ids
|
|
}
|
|
|
|
func (t *compactionTrigger) handleGlobalSignal(signal *compactionSignal) {
|
|
t.forceMu.Lock()
|
|
defer t.forceMu.Unlock()
|
|
|
|
// 1. try global single compaction
|
|
t1 := time.Now()
|
|
if t.compactionHandler.isFull() {
|
|
return
|
|
}
|
|
segments := t.meta.segments.GetSegments()
|
|
singleCompactionPlans := t.globalSingleCompaction(segments, false, signal)
|
|
if len(singleCompactionPlans) != 0 {
|
|
log.Debug("global single compaction plans", zap.Int64("signalID", signal.id), zap.Int64s("plans", getPlanIDs(singleCompactionPlans)))
|
|
}
|
|
|
|
// 2. try global merge compaction
|
|
if t.compactionHandler.isFull() {
|
|
return
|
|
}
|
|
|
|
mergeCompactionPlans := t.globalMergeCompaction(signal, false)
|
|
if len(mergeCompactionPlans) != 0 {
|
|
log.Debug("global merge compaction plans", zap.Int64("signalID", signal.id), zap.Int64s("plans", getPlanIDs(mergeCompactionPlans)))
|
|
}
|
|
|
|
log.Info("handle global compaction cost", zap.Int64("milliseconds", time.Since(t1).Milliseconds()))
|
|
}
|
|
|
|
func (t *compactionTrigger) handleSignal(signal *compactionSignal) {
|
|
t.forceMu.Lock()
|
|
defer t.forceMu.Unlock()
|
|
|
|
t1 := time.Now()
|
|
// 1. check whether segment's binlogs should be compacted or not
|
|
if t.compactionHandler.isFull() {
|
|
return
|
|
}
|
|
|
|
segment := t.meta.GetSegment(signal.segmentID)
|
|
singleCompactionPlan, err := t.singleCompaction(segment, signal.isForce, signal)
|
|
if err != nil {
|
|
log.Warn("failed to do single compaction", zap.Int64("segmentID", segment.ID), zap.Error(err))
|
|
} else {
|
|
log.Info("time cost of generating single compaction plan", zap.Int64("millis", time.Since(t1).Milliseconds()),
|
|
zap.Int64("planID", singleCompactionPlan.GetPlanID()), zap.Int64("signalID", signal.id))
|
|
}
|
|
|
|
// 2. check whether segments of partition&channel level should be compacted or not
|
|
if t.compactionHandler.isFull() {
|
|
return
|
|
}
|
|
|
|
channel := segment.GetInsertChannel()
|
|
partitionID := segment.GetPartitionID()
|
|
|
|
segments := t.getCandidateSegments(channel, partitionID)
|
|
|
|
plans := t.mergeCompaction(segments, signal, false)
|
|
if len(plans) != 0 {
|
|
log.Debug("merge compaction plans", zap.Int64("signalID", signal.id), zap.Int64s("plans", getPlanIDs(plans)))
|
|
}
|
|
|
|
// log.Info("time cost of generating merge compaction", zap.Int64("planID", plan.PlanID), zap.Any("time cost", time.Since(t1).Milliseconds()),
|
|
// zap.String("channel", channel), zap.Int64("partitionID", partitionID))
|
|
}
|
|
|
|
func (t *compactionTrigger) globalMergeCompaction(signal *compactionSignal, isForce bool, collections ...UniqueID) []*datapb.CompactionPlan {
|
|
colls := make(map[int64]struct{})
|
|
for _, collID := range collections {
|
|
colls[collID] = struct{}{}
|
|
}
|
|
m := t.meta.GetSegmentsChanPart(func(segment *SegmentInfo) bool {
|
|
_, has := colls[segment.GetCollectionID()]
|
|
return (has || len(collections) == 0) && // if filters collection
|
|
isSegmentHealthy(segment) &&
|
|
segment.State == commonpb.SegmentState_Flushed && // flushed only
|
|
!segment.isCompacting // not compacting now
|
|
}) // m is list of chanPartSegments, which is channel-partition organized segments
|
|
plans := make([]*datapb.CompactionPlan, 0)
|
|
for _, segments := range m {
|
|
if !isForce && t.compactionHandler.isFull() {
|
|
return plans
|
|
}
|
|
mplans := t.mergeCompaction(segments.segments, signal, isForce)
|
|
plans = append(plans, mplans...)
|
|
}
|
|
|
|
return plans
|
|
}
|
|
|
|
func (t *compactionTrigger) mergeCompaction(segments []*SegmentInfo, signal *compactionSignal, isForce bool) []*datapb.CompactionPlan {
|
|
if !isForce && !t.shouldDoMergeCompaction(segments) {
|
|
return nil
|
|
}
|
|
|
|
plans := t.mergeCompactionPolicy.generatePlan(segments, signal.timetravel)
|
|
if len(plans) == 0 {
|
|
return nil
|
|
}
|
|
|
|
res := make([]*datapb.CompactionPlan, 0, len(plans))
|
|
for _, plan := range plans {
|
|
if !isForce && t.compactionHandler.isFull() {
|
|
return nil
|
|
}
|
|
|
|
if err := t.fillOriginPlan(plan); err != nil {
|
|
log.Warn("failed to fill plan", zap.Error(err))
|
|
continue
|
|
}
|
|
|
|
log.Debug("exec merge compaction plan", zap.Any("plan", plan))
|
|
if err := t.compactionHandler.execCompactionPlan(signal, plan); err != nil {
|
|
log.Warn("failed to execute compaction plan", zap.Error(err))
|
|
continue
|
|
}
|
|
res = append(res, plan)
|
|
}
|
|
return res
|
|
}
|
|
|
|
func (t *compactionTrigger) getCandidateSegments(channel string, partitionID UniqueID) []*SegmentInfo {
|
|
segments := t.meta.GetSegmentsByChannel(channel)
|
|
res := make([]*SegmentInfo, 0)
|
|
for _, s := range segments {
|
|
if s.GetState() != commonpb.SegmentState_Flushed || s.GetInsertChannel() != channel ||
|
|
s.GetPartitionID() != partitionID || s.isCompacting {
|
|
continue
|
|
}
|
|
res = append(res, s)
|
|
}
|
|
return res
|
|
}
|
|
|
|
func (t *compactionTrigger) shouldDoMergeCompaction(segments []*SegmentInfo) bool {
|
|
littleSegmentNum := 0
|
|
for _, s := range segments {
|
|
if s.GetNumOfRows() < s.GetMaxRowNum()/2 {
|
|
littleSegmentNum++
|
|
}
|
|
}
|
|
return littleSegmentNum >= t.mergeCompactionSegmentThreshold
|
|
}
|
|
|
|
func (t *compactionTrigger) fillOriginPlan(plan *datapb.CompactionPlan) error {
|
|
// TODO context
|
|
id, err := t.allocator.allocID(context.Background())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
plan.PlanID = id
|
|
plan.TimeoutInSeconds = maxCompactionTimeoutInSeconds
|
|
return nil
|
|
}
|
|
|
|
func (t *compactionTrigger) shouldDoSingleCompaction(segment *SegmentInfo, timetravel *timetravel) bool {
|
|
// single compaction only merge insert and delta log beyond the timetravel
|
|
// segment's insert binlogs dont have time range info, so we wait until the segment's last expire time is less than timetravel
|
|
// to ensure that all insert logs is beyond the timetravel.
|
|
// TODO: add meta in insert binlog
|
|
if segment.LastExpireTime >= timetravel.time {
|
|
return false
|
|
}
|
|
|
|
totalDeletedRows := 0
|
|
totalDeleteLogSize := int64(0)
|
|
for _, l := range segment.GetDeltalogs() {
|
|
if l.TimestampTo < timetravel.time {
|
|
totalDeletedRows += int(l.GetRecordEntries())
|
|
totalDeleteLogSize += l.GetDeltaLogSize()
|
|
}
|
|
}
|
|
|
|
// currently delta log size and delete ratio policy is applied
|
|
return float32(totalDeletedRows)/float32(segment.NumOfRows) >= singleCompactionRatioThreshold || totalDeleteLogSize > singleCompactionDeltaLogMaxSize
|
|
}
|
|
|
|
func (t *compactionTrigger) globalSingleCompaction(segments []*SegmentInfo, isForce bool, signal *compactionSignal) []*datapb.CompactionPlan {
|
|
plans := make([]*datapb.CompactionPlan, 0)
|
|
for _, segment := range segments {
|
|
if !isForce && t.compactionHandler.isFull() {
|
|
return plans
|
|
}
|
|
plan, err := t.singleCompaction(segment, isForce, signal)
|
|
if err != nil {
|
|
log.Warn("failed to exec single compaction", zap.Error(err))
|
|
continue
|
|
}
|
|
if plan != nil {
|
|
plans = append(plans, plan)
|
|
log.Debug("exec single compaction plan", zap.Any("plan", plan))
|
|
}
|
|
}
|
|
return plans
|
|
}
|
|
|
|
func (t *compactionTrigger) singleCompaction(segment *SegmentInfo, isForce bool, signal *compactionSignal) (*datapb.CompactionPlan, error) {
|
|
if segment == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
if !isForce && !t.shouldDoSingleCompaction(segment, signal.timetravel) {
|
|
return nil, nil
|
|
}
|
|
|
|
plan := t.singleCompactionPolicy.generatePlan(segment, signal.timetravel)
|
|
if plan == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
if err := t.fillOriginPlan(plan); err != nil {
|
|
return nil, err
|
|
}
|
|
return plan, t.compactionHandler.execCompactionPlan(signal, plan)
|
|
}
|