milvus/internal/datanode/writebuffer/l0_write_buffer.go

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package writebuffer
import (
"context"
"github.com/samber/lo"
"go.uber.org/zap"
"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
"github.com/milvus-io/milvus-proto/go-api/v2/msgpb"
"github.com/milvus-io/milvus/internal/allocator"
"github.com/milvus-io/milvus/internal/datanode/io"
"github.com/milvus-io/milvus/internal/datanode/metacache"
"github.com/milvus-io/milvus/internal/datanode/syncmgr"
"github.com/milvus-io/milvus/internal/proto/datapb"
"github.com/milvus-io/milvus/internal/storage"
"github.com/milvus-io/milvus/pkg/common"
"github.com/milvus-io/milvus/pkg/mq/msgstream"
"github.com/milvus-io/milvus/pkg/util/conc"
"github.com/milvus-io/milvus/pkg/util/merr"
"github.com/milvus-io/milvus/pkg/util/paramtable"
"github.com/milvus-io/milvus/pkg/util/retry"
"github.com/milvus-io/milvus/pkg/util/typeutil"
)
type l0WriteBuffer struct {
*writeBufferBase
l0Segments map[int64]int64 // partitionID => l0 segment ID
l0partition map[int64]int64 // l0 segment id => partition id
syncMgr syncmgr.SyncManager
idAllocator allocator.Interface
}
func NewL0WriteBuffer(channel string, metacache metacache.MetaCache, storageV2Cache *metacache.StorageV2Cache, syncMgr syncmgr.SyncManager, option *writeBufferOption) (WriteBuffer, error) {
if option.idAllocator == nil {
return nil, merr.WrapErrServiceInternal("id allocator is nil when creating l0 write buffer")
}
base, err := newWriteBufferBase(channel, metacache, storageV2Cache, syncMgr, option)
if err != nil {
return nil, err
}
return &l0WriteBuffer{
l0Segments: make(map[int64]int64),
l0partition: make(map[int64]int64),
writeBufferBase: base,
syncMgr: syncMgr,
idAllocator: option.idAllocator,
}, nil
}
func (wb *l0WriteBuffer) dispatchDeleteMsgs(groups []*inData, deleteMsgs []*msgstream.DeleteMsg, startPos, endPos *msgpb.MsgPosition) {
batchSize := paramtable.Get().CommonCfg.BloomFilterApplyBatchSize.GetAsInt()
split := func(pks []storage.PrimaryKey, pkTss []uint64, partitionSegments []*metacache.SegmentInfo, partitionGroups []*inData) []bool {
lc := storage.NewBatchLocationsCache(pks)
// use hits to cache result
hits := make([]bool, len(pks))
for _, segment := range partitionSegments {
hits = segment.GetBloomFilterSet().BatchPkExistWithHits(lc, hits)
}
for _, inData := range partitionGroups {
hits = inData.batchPkExists(pks, pkTss, hits)
}
return hits
}
type BatchApplyRet = struct {
// represent the idx for delete msg in deleteMsgs
DeleteDataIdx int
// represent the start idx for the batch in each deleteMsg
StartIdx int
Hits []bool
}
// transform pk to primary key
pksInDeleteMsgs := lo.Map(deleteMsgs, func(delMsg *msgstream.DeleteMsg, _ int) []storage.PrimaryKey {
return storage.ParseIDs2PrimaryKeys(delMsg.GetPrimaryKeys())
})
retIdx := 0
retMap := typeutil.NewConcurrentMap[int, *BatchApplyRet]()
pool := io.GetBFApplyPool()
var futures []*conc.Future[any]
for didx, delMsg := range deleteMsgs {
pks := pksInDeleteMsgs[didx]
pkTss := delMsg.GetTimestamps()
partitionSegments := wb.metaCache.GetSegmentsBy(metacache.WithPartitionID(delMsg.PartitionID),
metacache.WithSegmentState(commonpb.SegmentState_Growing, commonpb.SegmentState_Sealed, commonpb.SegmentState_Flushing, commonpb.SegmentState_Flushed))
partitionGroups := lo.Filter(groups, func(inData *inData, _ int) bool {
return delMsg.GetPartitionID() == common.AllPartitionsID || delMsg.GetPartitionID() == inData.partitionID
})
for idx := 0; idx < len(pks); idx += batchSize {
startIdx := idx
endIdx := idx + batchSize
if endIdx > len(pks) {
endIdx = len(pks)
}
retIdx += 1
tmpRetIdx := retIdx
deleteDataId := didx
future := pool.Submit(func() (any, error) {
hits := split(pks[startIdx:endIdx], pkTss[startIdx:endIdx], partitionSegments, partitionGroups)
retMap.Insert(tmpRetIdx, &BatchApplyRet{
DeleteDataIdx: deleteDataId,
StartIdx: startIdx,
Hits: hits,
})
return nil, nil
})
futures = append(futures, future)
}
}
conc.AwaitAll(futures...)
retMap.Range(func(key int, value *BatchApplyRet) bool {
l0SegmentID := wb.getL0SegmentID(deleteMsgs[value.DeleteDataIdx].GetPartitionID(), startPos)
pks := pksInDeleteMsgs[value.DeleteDataIdx]
pkTss := deleteMsgs[value.DeleteDataIdx].GetTimestamps()
var deletePks []storage.PrimaryKey
var deleteTss []typeutil.Timestamp
for i, hit := range value.Hits {
if hit {
deletePks = append(deletePks, pks[value.StartIdx+i])
deleteTss = append(deleteTss, pkTss[value.StartIdx+i])
}
}
if len(deletePks) > 0 {
wb.bufferDelete(l0SegmentID, deletePks, deleteTss, startPos, endPos)
}
return true
})
}
func (wb *l0WriteBuffer) BufferData(insertMsgs []*msgstream.InsertMsg, deleteMsgs []*msgstream.DeleteMsg, startPos, endPos *msgpb.MsgPosition) error {
wb.mut.Lock()
defer wb.mut.Unlock()
groups, err := wb.prepareInsert(insertMsgs)
if err != nil {
return err
}
// buffer insert data and add segment if not exists
for _, inData := range groups {
err := wb.bufferInsert(inData, startPos, endPos)
if err != nil {
return err
}
}
// distribute delete msg
// bf write buffer check bloom filter of segment and current insert batch to decide which segment to write delete data
wb.dispatchDeleteMsgs(groups, deleteMsgs, startPos, endPos)
// update pk oracle
for _, inData := range groups {
// segment shall always exists after buffer insert
segments := wb.metaCache.GetSegmentsBy(metacache.WithSegmentIDs(inData.segmentID))
for _, segment := range segments {
for _, fieldData := range inData.pkField {
err := segment.GetBloomFilterSet().UpdatePKRange(fieldData)
if err != nil {
return err
}
}
}
}
// update buffer last checkpoint
wb.checkpoint = endPos
segmentsSync := wb.triggerSync()
for _, segment := range segmentsSync {
partition, ok := wb.l0partition[segment]
if ok {
delete(wb.l0partition, segment)
delete(wb.l0Segments, partition)
}
}
return nil
}
func (wb *l0WriteBuffer) getL0SegmentID(partitionID int64, startPos *msgpb.MsgPosition) int64 {
log := wb.logger
segmentID, ok := wb.l0Segments[partitionID]
if !ok {
err := retry.Do(context.Background(), func() error {
var err error
segmentID, err = wb.idAllocator.AllocOne()
return err
})
if err != nil {
log.Error("failed to allocate l0 segment ID", zap.Error(err))
panic(err)
}
wb.l0Segments[partitionID] = segmentID
wb.l0partition[segmentID] = partitionID
wb.metaCache.AddSegment(&datapb.SegmentInfo{
ID: segmentID,
PartitionID: partitionID,
CollectionID: wb.collectionID,
InsertChannel: wb.channelName,
StartPosition: startPos,
State: commonpb.SegmentState_Growing,
Level: datapb.SegmentLevel_L0,
}, func(_ *datapb.SegmentInfo) *metacache.BloomFilterSet { return metacache.NewBloomFilterSet() }, metacache.SetStartPosRecorded(false))
log.Info("Add a new level zero segment",
zap.Int64("segmentID", segmentID),
zap.String("level", datapb.SegmentLevel_L0.String()),
zap.Any("start position", startPos),
)
}
return segmentID
}