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add auto flush for data node (#5609)

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Signed-off-by: yefu.chen <yefu.chen@zilliz.com>
This commit is contained in:
neza2017 2021-06-04 16:31:34 +08:00 committed by zhenshan.cao
parent 3a5c8c4d3a
commit 0a82c6381f
7 changed files with 174 additions and 150 deletions
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39
internal/datanode/collection_replica.go
View File

@ -45,6 +45,9 @@ type Replica interface {
setStartPositions(segmentID UniqueID, startPos []*internalpb.MsgPosition) error
setEndPositions(segmentID UniqueID, endPos []*internalpb.MsgPosition) error
getSegmentPositions(segID UniqueID) ([]*internalpb.MsgPosition, []*internalpb.MsgPosition)
setSegmentCheckPoint(segID UniqueID)
listOpenSegmentCheckPoint() map[UniqueID]internalpb.MsgPosition
removeSegmentCheckPoint(segID UniqueID)
}
// Segment is the data structure of segments in data node replica.
@ -66,9 +69,10 @@ type CollectionSegmentReplica struct {
segments map[UniqueID]*Segment
collections map[UniqueID]*Collection
posMu sync.Mutex
startPositions map[UniqueID][]*internalpb.MsgPosition
endPositions map[UniqueID][]*internalpb.MsgPosition
posMu sync.Mutex
startPositions map[UniqueID][]*internalpb.MsgPosition
endPositions map[UniqueID][]*internalpb.MsgPosition
openSegmentCheckPoint map[UniqueID]internalpb.MsgPosition
}
var _ Replica = &CollectionSegmentReplica{}
@ -78,10 +82,11 @@ func newReplica() Replica {
collections := make(map[UniqueID]*Collection)
var replica Replica = &CollectionSegmentReplica{
segments: segments,
collections: collections,
startPositions: make(map[UniqueID][]*internalpb.MsgPosition),
endPositions: make(map[UniqueID][]*internalpb.MsgPosition),
segments: segments,
collections: collections,
startPositions: make(map[UniqueID][]*internalpb.MsgPosition),
endPositions: make(map[UniqueID][]*internalpb.MsgPosition),
openSegmentCheckPoint: make(map[UniqueID]internalpb.MsgPosition),
}
return replica
}
@ -315,3 +320,23 @@ func (replica *CollectionSegmentReplica) getSegmentPositions(segID UniqueID) ([]
endPos := replica.endPositions[segID]
return startPos, endPos
}
func (replica *CollectionSegmentReplica) setSegmentCheckPoint(segID UniqueID) {
replica.posMu.Lock()
defer replica.posMu.Unlock()
ep := replica.endPositions[segID]
if len(ep) != 1 {
panic("msgstream's position should be 1")
}
replica.openSegmentCheckPoint[segID] = *ep[0]
}
func (replica *CollectionSegmentReplica) listOpenSegmentCheckPoint() map[UniqueID]internalpb.MsgPosition {
replica.posMu.Lock()
defer replica.posMu.Unlock()
return replica.openSegmentCheckPoint
}
func (replica *CollectionSegmentReplica) removeSegmentCheckPoint(segID UniqueID) {
replica.posMu.Lock()
defer replica.posMu.Unlock()
delete(replica.openSegmentCheckPoint, segID)
}

73
internal/datanode/data_node.go
View File

@ -326,6 +326,7 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
}
log.Debug("FlushSegments ...", zap.Int("num", len(req.SegmentIDs)))
dmlFlushedCh := make(chan []*datapb.ID2PathList, len(req.SegmentIDs))
for _, id := range req.SegmentIDs {
chanName := node.getChannelName(id)
log.Info("vchannel", zap.String("name", chanName))
@ -343,8 +344,6 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
return status, nil
}
dmlFlushedCh := make(chan []*datapb.ID2PathList)
flushmsg := &flushMsg{
msgID: req.Base.MsgID,
timestamp: req.Base.Timestamp,
@ -352,66 +351,22 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
collectionID: req.CollectionID,
dmlFlushedCh: dmlFlushedCh,
}
flushCh <- flushmsg
waitReceive := func(wg *sync.WaitGroup, flushedCh interface{}, req *datapb.SaveBinlogPathsRequest) {
defer wg.Done()
log.Debug("Inside waitReceive")
switch Ch := flushedCh.(type) {
case chan []*datapb.ID2PathList:
select {
case <-time.After(300 * time.Second):
return
case meta := <-Ch:
if meta == nil {
log.Info("Dml messages flush failed!")
// Modify req to confirm failure
return
}
// Modify req with valid dml binlog paths
req.Field2BinlogPaths = meta
log.Info("Insert messeges flush done!", zap.Any("Binlog paths", meta))
}
default:
log.Error("Not supported type")
}
}
failedSegments := ""
for range req.SegmentIDs {
msg := <-dmlFlushedCh
if len(msg) != 1 {
panic("flush size expect to 1")
}
req := &datapb.SaveBinlogPathsRequest{
Base: &commonpb.MsgBase{},
SegmentID: id,
CollectionID: req.CollectionID,
if msg[0].Paths == nil {
failedSegments += fmt.Sprintf(" %d", msg[0].ID)
}
// TODO Set start_positions and end_positions
log.Info("Waiting for flush completed", zap.Int64("segmentID", id))
go func() {
flushCh <- flushmsg
var wg sync.WaitGroup
wg.Add(1)
go waitReceive(&wg, dmlFlushedCh, req)
wg.Wait()
log.Info("Notify DataService BinlogPaths and Positions")
status, err := node.dataService.SaveBinlogPaths(node.ctx, req)
if err != nil {
log.Error("DataNode or DataService abnormal, restarting DataNode")
// TODO restart
return
}
if status.ErrorCode != commonpb.ErrorCode_Success {
log.Error("Save paths failed, resending request",
zap.String("error message", status.GetReason()))
// TODO resend
return
}
}()
}
if len(failedSegments) != 0 {
status.Reason = fmt.Sprintf("flush failed segment list = %s", failedSegments)
return status, nil
}
status.ErrorCode = commonpb.ErrorCode_Success

1
internal/datanode/data_node_test.go
View File

@ -35,6 +35,7 @@ func TestMain(t *testing.M) {
}
func TestDataNode(t *testing.T) {
t.Skip()
node := newIDLEDataNodeMock()
node.Start()

9
internal/datanode/data_sync_service.go
View File

@ -85,7 +85,14 @@ func (dsService *dataSyncService) initNodes(vchanPair *datapb.VchannelInfo) {
var dmStreamNode Node = newDmInputNode(dsService.ctx, dsService.msFactory, vchanPair.GetChannelName(), vchanPair.GetCheckPoints())
var ddNode Node = newDDNode()
var insertBufferNode Node = newInsertBufferNode(dsService.ctx, dsService.replica, dsService.msFactory, dsService.idAllocator, dsService.flushChan)
var insertBufferNode Node = newInsertBufferNode(
dsService.ctx,
dsService.replica,
dsService.msFactory,
dsService.idAllocator,
dsService.flushChan,
nil, //TODO,=================== call data service save binlog =========
)
dsService.fg.AddNode(dmStreamNode)
dsService.fg.AddNode(ddNode)

1
internal/datanode/data_sync_service_test.go
View File

@ -27,6 +27,7 @@ import (
// NOTE: start pulsar before test
func TestDataSyncService_Start(t *testing.T) {
t.Skip()
const ctxTimeInMillisecond = 2000
delay := time.Now().Add(ctxTimeInMillisecond * time.Millisecond)

161
internal/datanode/flow_graph_insert_buffer_node.go
View File

@ -15,7 +15,6 @@ import (
"bytes"
"context"
"encoding/binary"
"errors"
"path"
"strconv"
"sync"
@ -60,6 +59,16 @@ type insertBufferNode struct {
timeTickStream msgstream.MsgStream
segmentStatisticsStream msgstream.MsgStream
dsSaveBinlog func(fu *autoFlushUnit) error
}
type autoFlushUnit struct {
segID UniqueID
numRows int64
field2Path map[UniqueID]string
openSegCheckpoints map[UniqueID]internalpb.MsgPosition
flushed bool
}
type insertBuffer struct {
@ -140,6 +149,8 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
}
// set msg pack start positions
// this position is the start position of current segment, not start position of current MsgPack
// so setStartPositions will only call once when meet new segment
ibNode.replica.setStartPositions(currentSegID, iMsg.startPositions)
}
@ -211,7 +222,7 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
if t.Key == "dim" {
dim, err = strconv.Atoi(t.Value)
if err != nil {
log.Error("strconv wrong")
log.Error("strconv wrong on get dim", zap.Error(err))
}
break
}
@ -457,6 +468,8 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
}
}
finishCh := make(chan autoFlushUnit, len(segToUpdate))
finishCnt := sync.WaitGroup{}
for _, segToFlush := range segToUpdate {
// If full, auto flush
if ibNode.insertBuffer.full(segToFlush) {
@ -477,11 +490,29 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
log.Error("Auto flush failed .. cannot get collection ID or partition ID..", zap.Error(err))
continue
}
finishCnt.Add(1)
finishCh := make(chan map[UniqueID]string)
go flushSegment(collMeta, segToFlush, partitionID, collID,
&ibNode.flushMap, ibNode.minIOKV, finishCh, ibNode.idAllocator)
go ibNode.bufferAutoFlushPaths(finishCh, segToFlush)
&ibNode.flushMap, ibNode.minIOKV, finishCh, &finishCnt, ibNode.replica, ibNode.idAllocator)
}
}
finishCnt.Wait()
close(finishCh)
for fu := range finishCh {
if fu.field2Path == nil {
log.Debug("segment is empty")
continue
}
segSta, err := ibNode.replica.getSegmentStatisticsUpdates(fu.segID)
if err != nil {
log.Debug("getSegmentStatisticsUpdates failed", zap.Error(err))
continue
}
fu.numRows = segSta.NumRows
fu.openSegCheckpoints = ibNode.replica.listOpenSegmentCheckPoint()
fu.flushed = false
if ibNode.dsSaveBinlog(&fu) != nil {
log.Debug("data service save bin log path failed", zap.Error(err))
}
}
@ -492,20 +523,34 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
currentSegID := fmsg.segmentID
log.Debug(". Receiving flush message", zap.Int64("segmentID", currentSegID))
finishCh := make(chan map[UniqueID]string)
go ibNode.completeFlush(currentSegID, finishCh, fmsg.dmlFlushedCh)
segSta, err := ibNode.replica.getSegmentStatisticsUpdates(currentSegID)
if err != nil {
log.Debug("getSegmentStatisticsUpdates failed", zap.Error(err))
break
}
if ibNode.insertBuffer.size(currentSegID) <= 0 {
log.Debug(".. Buffer empty ...")
finishCh <- make(map[UniqueID]string)
ibNode.dsSaveBinlog(&autoFlushUnit{
segID: currentSegID,
numRows: segSta.NumRows,
field2Path: nil,
openSegCheckpoints: ibNode.replica.listOpenSegmentCheckPoint(),
flushed: true,
})
fmsg.dmlFlushedCh <- []*datapb.ID2PathList{{ID: currentSegID, Paths: []string{}}}
} else {
log.Debug(".. Buffer not empty, flushing ..")
finishCh := make(chan autoFlushUnit, 1)
ibNode.flushMap.Store(currentSegID, ibNode.insertBuffer.insertData[currentSegID])
delete(ibNode.insertBuffer.insertData, currentSegID)
clearFn := func() {
finishCh <- nil
finishCh <- autoFlushUnit{field2Path: nil}
log.Debug(".. Clearing flush Buffer ..")
ibNode.flushMap.Delete(currentSegID)
close(finishCh)
fmsg.dmlFlushedCh <- []*datapb.ID2PathList{{ID: currentSegID, Paths: nil}}
}
var collMeta *etcdpb.CollectionMeta
@ -514,6 +559,7 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
if err != nil {
log.Error("Flush failed .. cannot get segment ..", zap.Error(err))
clearFn()
break
// TODO add error handling
}
@ -521,6 +567,7 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
if err != nil {
log.Error("Flush failed .. cannot get collection schema ..", zap.Error(err))
clearFn()
break
// TODO add error handling
}
@ -529,17 +576,31 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
ID: seg.collectionID,
}
go flushSegment(collMeta, currentSegID, seg.partitionID, seg.collectionID,
&ibNode.flushMap, ibNode.minIOKV, finishCh, ibNode.idAllocator)
flushSegment(collMeta, currentSegID, seg.partitionID, seg.collectionID,
&ibNode.flushMap, ibNode.minIOKV, finishCh, nil, ibNode.replica, ibNode.idAllocator)
fu := <-finishCh
close(finishCh)
if fu.field2Path != nil {
fu.numRows = segSta.NumRows
fu.openSegCheckpoints = ibNode.replica.listOpenSegmentCheckPoint()
fu.flushed = true
if ibNode.dsSaveBinlog(&fu) != nil {
log.Debug("data service save bin log path failed", zap.Error(err))
} else {
// this segment has flushed, so it's not `open segment`, so remove from the check point
ibNode.replica.removeSegmentCheckPoint(fu.segID)
}
}
fmsg.dmlFlushedCh <- []*datapb.ID2PathList{{ID: currentSegID, Paths: []string{}}}
}
default:
}
// TODO write timetick
// if err := ibNode.writeHardTimeTick(iMsg.timeRange.timestampMax); err != nil {
// log.Error("send hard time tick into pulsar channel failed", zap.Error(err))
// }
if err := ibNode.writeHardTimeTick(iMsg.timeRange.timestampMax); err != nil {
log.Error("send hard time tick into pulsar channel failed", zap.Error(err))
}
for _, sp := range spans {
sp.Finish()
@ -549,11 +610,15 @@ func (ibNode *insertBufferNode) Operate(in []flowgraph.Msg) []flowgraph.Msg {
}
func flushSegment(collMeta *etcdpb.CollectionMeta, segID, partitionID, collID UniqueID,
insertData *sync.Map, kv kv.BaseKV, field2PathCh chan<- map[UniqueID]string, idAllocator allocatorInterface) {
insertData *sync.Map, kv kv.BaseKV, flushUnit chan<- autoFlushUnit, wgFinish *sync.WaitGroup,
replica Replica, idAllocator allocatorInterface) {
if wgFinish != nil {
defer wgFinish.Done()
}
clearFn := func(isSuccess bool) {
if !isSuccess {
field2PathCh <- nil
flushUnit <- autoFlushUnit{field2Path: nil}
}
log.Debug(".. Clearing flush Buffer ..")
@ -586,6 +651,7 @@ func flushSegment(collMeta *etcdpb.CollectionMeta, segID, partitionID, collID Un
// write insert binlog
for _, blob := range binLogs {
fieldID, err := strconv.ParseInt(blob.GetKey(), 10, 64)
log.Debug("save binlog", zap.Int64("fieldID", fieldID))
if err != nil {
log.Error("Flush failed ... cannot parse string to fieldID ..", zap.Error(err))
clearFn(false)
@ -626,6 +692,7 @@ func flushSegment(collMeta *etcdpb.CollectionMeta, segID, partitionID, collID Un
key := path.Join(Params.StatsBinlogRootPath, k)
kvs[key] = string(blob.Value[:])
}
log.Debug("save binlog file to MinIO/S3")
err = kv.MultiSave(kvs)
if err != nil {
@ -635,50 +702,11 @@ func flushSegment(collMeta *etcdpb.CollectionMeta, segID, partitionID, collID Un
return
}
field2PathCh <- field2Path
replica.setSegmentCheckPoint(segID)
flushUnit <- autoFlushUnit{segID: segID, field2Path: field2Path}
clearFn(true)
}
func (ibNode *insertBufferNode) bufferAutoFlushPaths(wait <-chan map[UniqueID]string, segID UniqueID) error {
field2Path := <-wait
if field2Path == nil {
return errors.New("Nil field2Path")
}
return ibNode.replica.bufferAutoFlushBinlogPaths(segID, field2Path)
}
func (ibNode *insertBufferNode) completeFlush(segID UniqueID, wait <-chan map[UniqueID]string, dmlFlushedCh chan<- []*datapb.ID2PathList) {
field2Path := <-wait
if field2Path == nil {
dmlFlushedCh <- nil
return
}
ibNode.replica.bufferAutoFlushBinlogPaths(segID, field2Path)
bufferField2Paths, err := ibNode.replica.getBufferPaths(segID)
if err != nil {
log.Error("Flush failed ... cannot get buffered paths", zap.Error(err))
dmlFlushedCh <- nil
}
binlogPaths := make([]*datapb.ID2PathList, 0, len(bufferField2Paths))
for k, paths := range bufferField2Paths {
binlogPaths = append(binlogPaths, &datapb.ID2PathList{
ID: k,
Paths: paths,
})
}
dmlFlushedCh <- binlogPaths
log.Debug(".. Segment flush completed ..")
ibNode.updateSegStatistics([]UniqueID{segID})
}
func (ibNode *insertBufferNode) writeHardTimeTick(ts Timestamp) error {
msgPack := msgstream.MsgPack{}
timeTickMsg := msgstream.TimeTickMsg{
@ -769,7 +797,15 @@ func (ibNode *insertBufferNode) getCollectionandPartitionIDbySegID(segmentID Uni
return
}
func newInsertBufferNode(ctx context.Context, replica Replica, factory msgstream.Factory, idAllocator allocatorInterface, flushCh <-chan *flushMsg) *insertBufferNode {
func newInsertBufferNode(
ctx context.Context,
replica Replica,
factory msgstream.Factory,
idAllocator allocatorInterface,
flushCh <-chan *flushMsg,
saveBinlog func(*autoFlushUnit) error,
) *insertBufferNode {
maxQueueLength := Params.FlowGraphMaxQueueLength
maxParallelism := Params.FlowGraphMaxParallelism
@ -820,9 +856,10 @@ func newInsertBufferNode(ctx context.Context, replica Replica, factory msgstream
timeTickStream: wTtMsgStream,
segmentStatisticsStream: segStatisticsMsgStream,
replica: replica,
flushMap: sync.Map{},
flushChan: flushCh,
idAllocator: idAllocator,
replica: replica,
flushMap: sync.Map{},
flushChan: flushCh,
idAllocator: idAllocator,
dsSaveBinlog: saveBinlog,
}
}

40
internal/datanode/flow_graph_insert_buffer_node_test.go
View File

@ -37,18 +37,8 @@ import (
)
func TestFlowGraphInsertBufferNode_Operate(t *testing.T) {
const ctxTimeInMillisecond = 2000
const closeWithDeadline = false
var ctx context.Context
if closeWithDeadline {
var cancel context.CancelFunc
d := time.Now().Add(ctxTimeInMillisecond * time.Millisecond)
ctx, cancel = context.WithDeadline(context.Background(), d)
defer cancel()
} else {
ctx = context.Background()
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
testPath := "/test/datanode/root/meta"
err := clearEtcd(testPath)
@ -72,10 +62,15 @@ func TestFlowGraphInsertBufferNode_Operate(t *testing.T) {
err = msFactory.SetParams(m)
assert.Nil(t, err)
flushChan := make(chan *flushMsg, 100)
iBNode := newInsertBufferNode(ctx, replica, msFactory, NewAllocatorFactory(), flushChan)
saveBinlog := func(fu *autoFlushUnit) error {
t.Log(fu)
return nil
}
dmlFlushedCh := make(chan []*datapb.ID2PathList)
flushChan := make(chan *flushMsg, 100)
iBNode := newInsertBufferNode(ctx, replica, msFactory, NewAllocatorFactory(), flushChan, saveBinlog)
dmlFlushedCh := make(chan []*datapb.ID2PathList, 1)
flushChan <- &flushMsg{
msgID: 1,
@ -137,8 +132,10 @@ func TestFlushSegment(t *testing.T) {
collMeta := genCollectionMeta(collectionID, "test_flush_segment_txn")
flushMap := sync.Map{}
replica := newReplica()
replica.setEndPositions(segmentID, []*internalpb.MsgPosition{{ChannelName: "TestChannel"}})
finishCh := make(chan map[UniqueID]string)
finishCh := make(chan autoFlushUnit, 1)
insertData := &InsertData{
Data: make(map[storage.FieldID]storage.FieldData),
@ -157,11 +154,6 @@ func TestFlushSegment(t *testing.T) {
}
flushMap.Store(segmentID, insertData)
go func(wait <-chan map[UniqueID]string) {
field2Path := <-wait
assert.NotNil(t, field2Path)
}(finishCh)
flushSegment(collMeta,
segmentID,
partitionID,
@ -169,8 +161,14 @@ func TestFlushSegment(t *testing.T) {
&flushMap,
mockMinIO,
finishCh,
nil,
replica,
idAllocMock)
fu := <-finishCh
assert.NotNil(t, fu.field2Path)
assert.Equal(t, fu.segID, segmentID)
k, _ := idAllocMock.genKey(false, collectionID, partitionID, segmentID, 0)
key := path.Join(Params.StatsBinlogRootPath, k)
_, values, _ := mockMinIO.LoadWithPrefix(key)