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sync_manager.go
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sync_manager.go
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package syncmgr
import (
"context"
"fmt"
"strconv"
"github.com/cockroachdb/errors"
"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/storage"
"github.com/milvus-io/milvus/pkg/config"
"github.com/milvus-io/milvus/pkg/log"
"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/typeutil"
)
type SyncManagerOption struct {
chunkManager storage.ChunkManager
allocator allocator.Interface
parallelTask int
}
type SyncMeta struct {
collectionID int64
partitionID int64
segmentID int64
channelName string
schema *schemapb.CollectionSchema
checkpoint *msgpb.MsgPosition
tsFrom typeutil.Timestamp
tsTo typeutil.Timestamp
metacache metacache.MetaCache
}
// SyncManager is the interface for sync manager.
// it processes the sync tasks inside and changes the meta.
//
//go:generate mockery --name=SyncManager --structname=MockSyncManager --output=./ --filename=mock_sync_manager.go --with-expecter --inpackage
type SyncManager interface {
// SyncData is the method to submit sync task.
SyncData(ctx context.Context, task Task, callbacks ...func(error) error) *conc.Future[struct{}]
}
type syncManager struct {
*keyLockDispatcher[int64]
chunkManager storage.ChunkManager
allocator allocator.Interface
tasks *typeutil.ConcurrentMap[string, Task]
}
func NewSyncManager(chunkManager storage.ChunkManager, allocator allocator.Interface) (SyncManager, error) {
params := paramtable.Get()
initPoolSize := params.DataNodeCfg.MaxParallelSyncMgrTasks.GetAsInt()
if initPoolSize < 1 {
return nil, merr.WrapErrParameterInvalid("positive parallel task number", strconv.FormatInt(int64(initPoolSize), 10))
}
dispatcher := newKeyLockDispatcher[int64](initPoolSize)
log.Info("sync manager initialized", zap.Int("initPoolSize", initPoolSize))
syncMgr := &syncManager{
keyLockDispatcher: dispatcher,
chunkManager: chunkManager,
allocator: allocator,
tasks: typeutil.NewConcurrentMap[string, Task](),
}
// setup config update watcher
params.Watch(params.DataNodeCfg.MaxParallelSyncMgrTasks.Key, config.NewHandler("datanode.syncmgr.poolsize", syncMgr.resizeHandler))
return syncMgr, nil
}
func (mgr *syncManager) resizeHandler(evt *config.Event) {
if evt.HasUpdated {
log := log.Ctx(context.Background()).With(
zap.String("key", evt.Key),
zap.String("value", evt.Value),
)
size, err := strconv.ParseInt(evt.Value, 10, 64)
if err != nil {
log.Warn("failed to parse new datanode syncmgr pool size", zap.Error(err))
return
}
err = mgr.keyLockDispatcher.workerPool.Resize(int(size))
if err != nil {
log.Warn("failed to resize datanode syncmgr pool size", zap.String("key", evt.Key), zap.String("value", evt.Value), zap.Error(err))
return
}
log.Info("sync mgr pool size updated", zap.Int64("newSize", size))
}
}
func (mgr *syncManager) SyncData(ctx context.Context, task Task, callbacks ...func(error) error) *conc.Future[struct{}] {
switch t := task.(type) {
case *SyncTask:
t.WithAllocator(mgr.allocator).WithChunkManager(mgr.chunkManager)
case *SyncTaskV2:
t.WithAllocator(mgr.allocator)
}
return mgr.safeSubmitTask(task, callbacks...)
}
// safeSubmitTask handles submitting task logic with optimistic target check logic
// when task returns errTargetSegmentNotMatch error
// perform refetch then retry logic
func (mgr *syncManager) safeSubmitTask(task Task, callbacks ...func(error) error) *conc.Future[struct{}] {
taskKey := fmt.Sprintf("%d-%d", task.SegmentID(), task.Checkpoint().GetTimestamp())
mgr.tasks.Insert(taskKey, task)
key, err := task.CalcTargetSegment()
if err != nil {
task.HandleError(err)
return conc.Go(func() (struct{}, error) { return struct{}{}, err })
}
return mgr.submit(key, task, callbacks...)
}
func (mgr *syncManager) submit(key int64, task Task, callbacks ...func(error) error) *conc.Future[struct{}] {
handler := func(err error) error {
if err == nil {
return nil
}
// unexpected error
if !errors.Is(err, errTargetSegmentNotMatch) {
task.HandleError(err)
return err
}
targetID, err := task.CalcTargetSegment()
// shall not reach, segment meta lost during sync
if err != nil {
task.HandleError(err)
return err
}
if targetID == key {
err = merr.WrapErrServiceInternal("recaluated with same key", fmt.Sprint(targetID))
task.HandleError(err)
return err
}
log.Info("task calculated target segment id",
zap.Int64("targetID", targetID),
zap.Int64("segmentID", task.SegmentID()),
)
return mgr.submit(targetID, task).Err()
}
callbacks = append([]func(error) error{handler}, callbacks...)
log.Info("sync mgr sumbit task with key", zap.Int64("key", key))
return mgr.Submit(key, task, callbacks...)
}
func (mgr *syncManager) GetEarliestPosition(channel string) (int64, *msgpb.MsgPosition) {
var cp *msgpb.MsgPosition
var segmentID int64
mgr.tasks.Range(func(_ string, task Task) bool {
if task.StartPosition() == nil {
return true
}
if task.ChannelName() == channel {
if cp == nil || task.StartPosition().GetTimestamp() < cp.GetTimestamp() {
cp = task.StartPosition()
segmentID = task.SegmentID()
}
}
return true
})
return segmentID, cp
}