milvus/internal/datanode/writebuffer/l0_write_buffer.go

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package writebuffer
import (
"context"
"go.uber.org/zap"
"github.com/milvus-io/milvus-proto/go-api/v2/msgpb"
"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
"github.com/milvus-io/milvus/internal/allocator"
"github.com/milvus-io/milvus/internal/datanode/metacache"
"github.com/milvus-io/milvus/internal/datanode/syncmgr"
"github.com/milvus-io/milvus/internal/storage"
"github.com/milvus-io/milvus/pkg/log"
"github.com/milvus-io/milvus/pkg/mq/msgstream"
"github.com/milvus-io/milvus/pkg/util/merr"
"github.com/milvus-io/milvus/pkg/util/retry"
)
type l0WriteBuffer struct {
*writeBufferBase
l0Segments map[int64]int64 // partitionID => l0 segment ID
syncMgr syncmgr.SyncManager
idAllocator allocator.Interface
}
func NewL0WriteBuffer(sch *schemapb.CollectionSchema, metacache metacache.MetaCache, syncMgr syncmgr.SyncManager, option *writeBufferOption) (WriteBuffer, error) {
if option.idAllocator == nil {
return nil, merr.WrapErrServiceInternal("id allocator is nil when creating l0 write buffer")
}
return &l0WriteBuffer{
l0Segments: make(map[int64]int64),
writeBufferBase: newWriteBufferBase(sch, metacache, syncMgr, option),
syncMgr: syncMgr,
idAllocator: option.idAllocator,
}, nil
}
func (wb *l0WriteBuffer) BufferData(insertMsgs []*msgstream.InsertMsg, deleteMsgs []*msgstream.DeleteMsg, startPos, endPos *msgpb.MsgPosition) error {
wb.mut.Lock()
defer wb.mut.Unlock()
// process insert msgs
_, err := wb.bufferInsert(insertMsgs, startPos, endPos)
if err != nil {
log.Warn("failed to buffer insert data", zap.Error(err))
return err
}
for _, msg := range deleteMsgs {
l0SegmentID := wb.getL0SegmentID(msg.GetPartitionID())
pks := storage.ParseIDs2PrimaryKeys(msg.GetPrimaryKeys())
err := wb.bufferDelete(l0SegmentID, pks, msg.GetTimestamps(), startPos, endPos)
if err != nil {
log.Warn("failed to buffer delete data", zap.Error(err))
return err
}
}
// update buffer last checkpoint
wb.checkpoint = endPos
return wb.triggerAutoSync()
}
func (wb *l0WriteBuffer) getL0SegmentID(partitionID int64) int64 {
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
}
return segmentID
}