diff --git a/client/internal/cmdline/test.go b/client/internal/cmdline/test.go
index 0e8d167..1fb7427 100644
--- a/client/internal/cmdline/test.go
+++ b/client/internal/cmdline/test.go
@@ -10,14 +10,15 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
 	cdssdk "gitlink.org.cn/cloudream/common/sdks/storage"
 	stgglb "gitlink.org.cn/cloudream/storage/common/globals"
-	"gitlink.org.cn/cloudream/storage/common/pkgs/downloader"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2/parser"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
+	lrcparser "gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc/parser"
 	coormq "gitlink.org.cn/cloudream/storage/common/pkgs/mq/coordinator"
 )
 
 func init() {
-	cmd := &cobra.Command{
+	rootCmd.AddCommand(&cobra.Command{
 		Use:   "test2",
 		Short: "test2",
 		// Args:  cobra.ExactArgs(1),
@@ -36,22 +37,22 @@ func init() {
 
 			ft := ioswitch2.NewFromTo()
 
-			// ft.AddFrom(plans.NewFromNode("Qmf412jQZiuVUtdgnB36FXFX7xg5V6KEbSJ4dpQuhkLyfD", &nodes.Nodes[0], -1))
-			// ft.AddTo(plans.NewToNode(nodes.Nodes[1], -1, "asd"))
-			// len := int64(3)
-			// toExec, hd := plans.NewToExecutorWithRange(-1, plans.Range{Offset: 5, Length: &len})
-			// ft.AddTo(toExec)
-			// ft.AddTo(plans.NewToNode(nodes.Nodes[1], 0, "0"))
-			// ft.AddTo(plans.NewToNode(nodes.Nodes[1], 1, "1"))
-			// ft.AddTo(plans.NewToNode(nodes.Nodes[1], 2, "2"))
-
-			ft.AddFrom(ioswitch2.NewFromNode("QmS2s8GRYHEurXL7V1zUtKvf2H1BGcQc5NN1T1hiSnWvbd", &nodes.Nodes[0], 1))
-			ft.AddFrom(ioswitch2.NewFromNode("QmUgUEUMzdnjPNx6xu9PDGXpSyXTk8wzPWvyYZ9zasE1WW", &nodes.Nodes[1], 2))
+			ft.AddFrom(ioswitch2.NewFromNode("Qmf412jQZiuVUtdgnB36FXFX7xg5V6KEbSJ4dpQuhkLyfD", &nodes.Nodes[0], -1))
+			ft.AddTo(ioswitch2.NewToNode(nodes.Nodes[1], -1, "asd"))
 			le := int64(3)
 			toExec, hd := ioswitch2.NewToDriverWithRange(-1, exec.Range{Offset: 5, Length: &le})
+			ft.AddTo(toExec)
+			ft.AddTo(ioswitch2.NewToNode(nodes.Nodes[1], 0, "0"))
+			ft.AddTo(ioswitch2.NewToNode(nodes.Nodes[1], 1, "1"))
+			ft.AddTo(ioswitch2.NewToNode(nodes.Nodes[1], 2, "2"))
+
+			// ft.AddFrom(ioswitch2.NewFromNode("QmS2s8GRYHEurXL7V1zUtKvf2H1BGcQc5NN1T1hiSnWvbd", &nodes.Nodes[0], 1))
+			// ft.AddFrom(ioswitch2.NewFromNode("QmUgUEUMzdnjPNx6xu9PDGXpSyXTk8wzPWvyYZ9zasE1WW", &nodes.Nodes[1], 2))
+			// le := int64(5)
+			// toExec, hd := ioswitch2.NewToDriverWithRange(-1, exec.Range{Offset: 3, Length: &le})
 			// toExec, hd := plans.NewToExecutorWithRange(1, plans.Range{Offset: 0, Length: nil})
 			// toExec2, hd2 := plans.NewToExecutorWithRange(2, plans.Range{Offset: 0, Length: nil})
-			ft.AddTo(toExec)
+			// ft.AddTo(toExec)
 			// ft.AddTo(toExec2)
 
 			// fromExec, hd := plans.NewFromExecutor(-1)
@@ -99,23 +100,151 @@ func init() {
 
 			fut.Wait(context.TODO())
 		},
-	}
+	})
+
+	// rootCmd.AddCommand(&cobra.Command{
+	// 	Use:   "test",
+	// 	Short: "test",
+	// 	// Args:  cobra.ExactArgs(1),
+	// 	Run: func(cmd *cobra.Command, args []string) {
+	// 		cmdCtx := GetCmdCtx(cmd)
+	// 		file, _ := cmdCtx.Cmdline.Svc.ObjectSvc().Download(1, downloader.DownloadReqeust{
+	// 			ObjectID: 27379,
+	// 			Length:   -1,
+	// 		})
+	// 		data, _ := io.ReadAll(file.File)
+	// 		fmt.Printf("data: %v(%v)\n", string(data), len(data))
+	// 	},
+	// })
+
+	rootCmd.AddCommand(&cobra.Command{
+		Use:   "test3",
+		Short: "test3",
+		// Args:  cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			// cmdCtx := GetCmdCtx(cmd)
+
+			coorCli, err := stgglb.CoordinatorMQPool.Acquire()
+			if err != nil {
+				panic(err)
+			}
+			defer stgglb.CoordinatorMQPool.Release(coorCli)
+
+			nodes, err := coorCli.GetNodes(coormq.NewGetNodes([]cdssdk.NodeID{1, 2}))
+			if err != nil {
+				panic(err)
+			}
+
+			red := cdssdk.DefaultLRCRedundancy
+
+			var toes []ioswitchlrc.To
+			for i := 0; i < red.N; i++ {
+				toes = append(toes, ioswitchlrc.NewToNode(nodes.Nodes[i%2], i, fmt.Sprintf("%d", i)))
+			}
+
+			plans := exec.NewPlanBuilder()
+			err = lrcparser.Encode(ioswitchlrc.NewFromNode("QmNspjDLxQbAsuh37jRXKvLWHE2f7JpqY4HEJ8x7Jgbzqa", &nodes.Nodes[0], -1), toes, plans)
+			if err != nil {
+				panic(err)
+				// return nil, fmt.Errorf("parsing plan: %w", err)
+			}
+
+			ioRet, err := plans.Execute().Wait(context.TODO())
+			if err != nil {
+				panic(err)
+				// return nil, fmt.Errorf("executing io plan: %w", err)
+			}
+
+			fmt.Printf("ioRet: %v\n", ioRet)
+		},
+	})
 
-	cmd2 := &cobra.Command{
+	rootCmd.AddCommand(&cobra.Command{
 		Use:   "test",
 		Short: "test",
 		// Args:  cobra.ExactArgs(1),
 		Run: func(cmd *cobra.Command, args []string) {
-			cmdCtx := GetCmdCtx(cmd)
-			file, _ := cmdCtx.Cmdline.Svc.ObjectSvc().Download(1, downloader.DownloadReqeust{
-				ObjectID: 27379,
-				Length:   -1,
-			})
-			data, _ := io.ReadAll(file.File)
-			fmt.Printf("data: %v(%v)\n", string(data), len(data))
+			// cmdCtx := GetCmdCtx(cmd)
+
+			coorCli, err := stgglb.CoordinatorMQPool.Acquire()
+			if err != nil {
+				panic(err)
+			}
+			defer stgglb.CoordinatorMQPool.Release(coorCli)
+
+			nodes, err := coorCli.GetNodes(coormq.NewGetNodes([]cdssdk.NodeID{1, 2}))
+			if err != nil {
+				panic(err)
+			}
+
+			// red := cdssdk.DefaultLRCRedundancy
+
+			plans := exec.NewPlanBuilder()
+			err = lrcparser.ReconstructGroup([]ioswitchlrc.From{
+				ioswitchlrc.NewFromNode("QmVAZzVQEvnvTvzSz2SvpziAcDSQ8aYCoTyGrZNuV8raEQ", &nodes.Nodes[1], 0),
+				ioswitchlrc.NewFromNode("QmVAZzVQEvnvTvzSz2SvpziAcDSQ8aYCoTyGrZNuV8raEQ", &nodes.Nodes[1], 1),
+			}, []ioswitchlrc.To{
+				ioswitchlrc.NewToNode(nodes.Nodes[1], 3, "3"),
+			}, plans)
+			if err != nil {
+				panic(err)
+				// return nil, fmt.Errorf("parsing plan: %w", err)
+			}
+
+			ioRet, err := plans.Execute().Wait(context.TODO())
+			if err != nil {
+				panic(err)
+				// return nil, fmt.Errorf("executing io plan: %w", err)
+			}
+
+			fmt.Printf("ioRet: %v\n", ioRet)
 		},
-	}
+	})
+
+	rootCmd.AddCommand(&cobra.Command{
+		Use:   "test4",
+		Short: "test4",
+		// Args:  cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			// cmdCtx := GetCmdCtx(cmd)
 
-	rootCmd.AddCommand(cmd)
-	rootCmd.AddCommand(cmd2)
+			coorCli, err := stgglb.CoordinatorMQPool.Acquire()
+			if err != nil {
+				panic(err)
+			}
+			defer stgglb.CoordinatorMQPool.Release(coorCli)
+
+			nodes, err := coorCli.GetNodes(coormq.NewGetNodes([]cdssdk.NodeID{1, 2}))
+			if err != nil {
+				panic(err)
+			}
+
+			// red := cdssdk.DefaultLRCRedundancy
+
+			plans := exec.NewPlanBuilder()
+			le := int64(1293)
+			err = lrcparser.ReconstructAny([]ioswitchlrc.From{
+				ioswitchlrc.NewFromNode("QmVAZzVQEvnvTvzSz2SvpziAcDSQ8aYCoTyGrZNuV8raEQ", &nodes.Nodes[0], 0),
+				ioswitchlrc.NewFromNode("QmQBKncEDqxw3BrGr3th3gS3jUC2fizGz1w29ZxxrrKfNv", &nodes.Nodes[0], 2),
+			}, []ioswitchlrc.To{
+				ioswitchlrc.NewToNodeWithRange(nodes.Nodes[1], -1, "-1", exec.Range{0, &le}),
+				ioswitchlrc.NewToNode(nodes.Nodes[1], 0, "0"),
+				ioswitchlrc.NewToNode(nodes.Nodes[1], 1, "1"),
+				ioswitchlrc.NewToNode(nodes.Nodes[1], 2, "2"),
+				ioswitchlrc.NewToNode(nodes.Nodes[1], 3, "3"),
+			}, plans)
+			if err != nil {
+				panic(err)
+				// return nil, fmt.Errorf("parsing plan: %w", err)
+			}
+
+			ioRet, err := plans.Execute().Wait(context.TODO())
+			if err != nil {
+				panic(err)
+				// return nil, fmt.Errorf("executing io plan: %w", err)
+			}
+
+			fmt.Printf("ioRet: %v\n", ioRet)
+		},
+	})
 }
diff --git a/common/pkgs/downloader/iterator.go b/common/pkgs/downloader/iterator.go
index b25c59c..ff6cf3c 100644
--- a/common/pkgs/downloader/iterator.go
+++ b/common/pkgs/downloader/iterator.go
@@ -151,6 +151,18 @@ func (iter *DownloadObjectIterator) doMove() (*Downloading, error) {
 			return nil, fmt.Errorf("downloading ec object: %w", err)
 		}
 
+		return &Downloading{
+			Object:  &req.Detail.Object,
+			File:    reader,
+			Request: req.Raw,
+		}, nil
+
+	case *cdssdk.LRCRedundancy:
+		reader, err := iter.downloadLRCObject(req, red)
+		if err != nil {
+			return nil, fmt.Errorf("downloading lrc object: %w", err)
+		}
+
 		return &Downloading{
 			Object:  &req.Detail.Object,
 			File:    reader,
diff --git a/common/pkgs/downloader/lrc.go b/common/pkgs/downloader/lrc.go
new file mode 100644
index 0000000..843bd9e
--- /dev/null
+++ b/common/pkgs/downloader/lrc.go
@@ -0,0 +1,87 @@
+package downloader
+
+import (
+	"fmt"
+	"io"
+
+	"gitlink.org.cn/cloudream/common/pkgs/iterator"
+	"gitlink.org.cn/cloudream/common/pkgs/logger"
+	cdssdk "gitlink.org.cn/cloudream/common/sdks/storage"
+	"gitlink.org.cn/cloudream/common/utils/io2"
+	"gitlink.org.cn/cloudream/common/utils/math2"
+)
+
+func (iter *DownloadObjectIterator) downloadLRCObject(req downloadReqeust2, red *cdssdk.LRCRedundancy) (io.ReadCloser, error) {
+	allNodes, err := iter.sortDownloadNodes(req)
+	if err != nil {
+		return nil, err
+	}
+
+	var blocks []downloadBlock
+	selectedBlkIdx := make(map[int]bool)
+	for _, node := range allNodes {
+		for _, b := range node.Blocks {
+			if b.Index >= red.M() || selectedBlkIdx[b.Index] {
+				continue
+			}
+			blocks = append(blocks, downloadBlock{
+				Node:  node.Node,
+				Block: b,
+			})
+			selectedBlkIdx[b.Index] = true
+		}
+	}
+	if len(blocks) < red.K {
+		return nil, fmt.Errorf("not enough blocks to download lrc object")
+	}
+
+	var logStrs []any = []any{"downloading lrc object from blocks: "}
+	for i, b := range blocks {
+		if i > 0 {
+			logStrs = append(logStrs, ", ")
+		}
+		logStrs = append(logStrs, fmt.Sprintf("%v@%v(%v)", b.Block.Index, b.Node.Name, b.Node.NodeID))
+	}
+	logger.Debug(logStrs...)
+
+	pr, pw := io.Pipe()
+	go func() {
+		readPos := req.Raw.Offset
+		totalReadLen := req.Detail.Object.Size - req.Raw.Offset
+		if req.Raw.Length >= 0 {
+			totalReadLen = math2.Min(req.Raw.Length, totalReadLen)
+		}
+
+		firstStripIndex := readPos / int64(red.K) / int64(red.ChunkSize)
+		stripIter := NewLRCStripIterator(req.Detail.Object, blocks, red, firstStripIndex, iter.downloader.strips, iter.downloader.cfg.ECStripPrefetchCount)
+		defer stripIter.Close()
+
+		for totalReadLen > 0 {
+			strip, err := stripIter.MoveNext()
+			if err == iterator.ErrNoMoreItem {
+				pw.CloseWithError(io.ErrUnexpectedEOF)
+				return
+			}
+			if err != nil {
+				pw.CloseWithError(err)
+				return
+			}
+
+			readRelativePos := readPos - strip.Position
+			nextStripPos := strip.Position + int64(red.K)*int64(red.ChunkSize)
+			curReadLen := math2.Min(totalReadLen, nextStripPos-readPos)
+
+			err = io2.WriteAll(pw, strip.Data[readRelativePos:readRelativePos+curReadLen])
+			if err != nil {
+				pw.CloseWithError(err)
+				return
+			}
+
+			totalReadLen -= curReadLen
+			readPos += curReadLen
+		}
+		pw.Close()
+	}()
+
+	return pr, nil
+}
diff --git a/common/pkgs/downloader/lrc_strip_iterator.go b/common/pkgs/downloader/lrc_strip_iterator.go
new file mode 100644
index 0000000..1309014
--- /dev/null
+++ b/common/pkgs/downloader/lrc_strip_iterator.go
@@ -0,0 +1,191 @@
+package downloader
+
+import (
+	"context"
+	"io"
+	"sync"
+
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/iterator"
+	"gitlink.org.cn/cloudream/common/pkgs/logger"
+	cdssdk "gitlink.org.cn/cloudream/common/sdks/storage"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc/parser"
+)
+
+type LRCStripIterator struct {
+	object              cdssdk.Object
+	blocks              []downloadBlock
+	red                 *cdssdk.LRCRedundancy
+	curStripIndex       int64
+	cache               *StripCache
+	dataChan            chan dataChanEntry
+	downloadingDone     chan any
+	downloadingDoneOnce sync.Once
+	inited              bool
+}
+
+func NewLRCStripIterator(object cdssdk.Object, blocks []downloadBlock, red *cdssdk.LRCRedundancy, beginStripIndex int64, cache *StripCache, maxPrefetch int) *LRCStripIterator {
+	if maxPrefetch <= 0 {
+		maxPrefetch = 1
+	}
+
+	iter := &LRCStripIterator{
+		object:          object,
+		blocks:          blocks,
+		red:             red,
+		curStripIndex:   beginStripIndex,
+		cache:           cache,
+		dataChan:        make(chan dataChanEntry, maxPrefetch-1),
+		downloadingDone: make(chan any),
+	}
+
+	return iter
+}
+
+func (s *LRCStripIterator) MoveNext() (Strip, error) {
+	if !s.inited {
+		go s.downloading()
+		s.inited = true
+	}
+
+	// 先尝试获取一下，用于判断本次获取是否发生了等待
+	select {
+	case entry, ok := <-s.dataChan:
+		if !ok || entry.Error == io.EOF {
+			return Strip{}, iterator.ErrNoMoreItem
+		}
+
+		if entry.Error != nil {
+			return Strip{}, entry.Error
+		}
+
+		s.curStripIndex++
+		return Strip{Data: entry.Data, Position: entry.Position}, nil
+
+	default:
+		logger.Debugf("waitting for ec strip %v of object %v", s.curStripIndex, s.object.ObjectID)
+	}
+
+	// 发生了等待
+	select {
+	case entry, ok := <-s.dataChan:
+		if !ok || entry.Error == io.EOF {
+			return Strip{}, iterator.ErrNoMoreItem
+		}
+
+		if entry.Error != nil {
+			return Strip{}, entry.Error
+		}
+
+		s.curStripIndex++
+		return Strip{Data: entry.Data, Position: entry.Position}, nil
+
+	case <-s.downloadingDone:
+		return Strip{}, iterator.ErrNoMoreItem
+	}
+}
+
+func (s *LRCStripIterator) Close() {
+	s.downloadingDoneOnce.Do(func() {
+		close(s.downloadingDone)
+	})
+}
+
+func (s *LRCStripIterator) downloading() {
+	var froms []ioswitchlrc.From
+	for _, b := range s.blocks {
+		froms = append(froms, ioswitchlrc.NewFromNode(b.Block.FileHash, &b.Node, b.Block.Index))
+	}
+
+	toExec, hd := ioswitchlrc.NewToDriverWithRange(-1, exec.Range{
+		Offset: s.curStripIndex * int64(s.red.ChunkSize*s.red.K),
+	})
+
+	plans := exec.NewPlanBuilder()
+	err := parser.ReconstructAny(froms, []ioswitchlrc.To{toExec}, plans)
+	if err != nil {
+		s.sendToDataChan(dataChanEntry{Error: err})
+		return
+	}
+	exec := plans.Execute()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	go exec.Wait(ctx)
+	defer cancel()
+
+	str, err := exec.BeginRead(hd)
+	if err != nil {
+		s.sendToDataChan(dataChanEntry{Error: err})
+		return
+	}
+
+	curStripIndex := s.curStripIndex
+loop:
+	for {
+		stripBytesPos := curStripIndex * int64(s.red.K) * int64(s.red.ChunkSize)
+		if stripBytesPos >= s.object.Size {
+			s.sendToDataChan(dataChanEntry{Error: io.EOF})
+			break
+		}
+
+		stripKey := ECStripKey{
+			ObjectID:   s.object.ObjectID,
+			StripIndex: curStripIndex,
+		}
+
+		item, ok := s.cache.Get(stripKey)
+		if ok {
+			if item.ObjectFileHash == s.object.FileHash {
+				if !s.sendToDataChan(dataChanEntry{Data: item.Data, Position: stripBytesPos}) {
+					break loop
+				}
+				curStripIndex++
+				continue
+
+			} else {
+				// 如果Object的Hash和Cache的Hash不一致，说明Cache是无效的，需要重新下载
+				s.cache.Remove(stripKey)
+			}
+		}
+
+		dataBuf := make([]byte, int64(s.red.K*s.red.ChunkSize))
+		n, err := io.ReadFull(str, dataBuf)
+		if err == io.ErrUnexpectedEOF {
+			s.cache.Add(stripKey, ObjectECStrip{
+				Data:           dataBuf,
+				ObjectFileHash: s.object.FileHash,
+			})
+
+			s.sendToDataChan(dataChanEntry{Data: dataBuf[:n], Position: stripBytesPos})
+			s.sendToDataChan(dataChanEntry{Error: io.EOF})
+			break loop
+		}
+		if err != nil {
+			s.sendToDataChan(dataChanEntry{Error: err})
+			break loop
+		}
+
+		s.cache.Add(stripKey, ObjectECStrip{
+			Data:           dataBuf,
+			ObjectFileHash: s.object.FileHash,
+		})
+
+		if !s.sendToDataChan(dataChanEntry{Data: dataBuf, Position: stripBytesPos}) {
+			break loop
+		}
+
+		curStripIndex++
+	}
+
+	close(s.dataChan)
+}
+
+func (s *LRCStripIterator) sendToDataChan(entry dataChanEntry) bool {
+	select {
+	case s.dataChan <- entry:
+		return true
+	case <-s.downloadingDone:
+		return false
+	}
+}
diff --git a/common/pkgs/ec/lrc/lrc.go b/common/pkgs/ec/lrc/lrc.go
index 6ef6c5a..586dd1f 100644
--- a/common/pkgs/ec/lrc/lrc.go
+++ b/common/pkgs/ec/lrc/lrc.go
@@ -16,7 +16,7 @@ func New(n int, k int, groups []int) (*LRC, error) {
 		groups: groups,
 	}
 
-	l, err := reedsolomon.NewLRC(k, n-k, groups)
+	l, err := reedsolomon.NewLRC(k, n-len(groups)-k, groups)
 	if err != nil {
 		return nil, err
 	}
diff --git a/common/pkgs/ioswitch2/ops2/chunked.go b/common/pkgs/ioswitch2/ops2/chunked.go
index 3533a55..0962e11 100644
--- a/common/pkgs/ioswitch2/ops2/chunked.go
+++ b/common/pkgs/ioswitch2/ops2/chunked.go
@@ -9,6 +9,7 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/future"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/dag"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/utils"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
 	"golang.org/x/sync/semaphore"
@@ -50,6 +51,16 @@ func (o *ChunkedSplit) Execute(ctx context.Context, e *exec.Executor) error {
 	return sem.Acquire(ctx, int64(len(outputs)))
 }
 
+func (o *ChunkedSplit) String() string {
+	return fmt.Sprintf(
+		"ChunkedSplit(chunkSize=%v, paddingZeros=%v), %v -> (%v)",
+		o.ChunkSize,
+		o.PaddingZeros,
+		o.Input.ID,
+		utils.FormatVarIDs(o.Outputs),
+	)
+}
+
 type ChunkedJoin struct {
 	Inputs    []*exec.StreamVar `json:"inputs"`
 	Output    *exec.StreamVar   `json:"output"`
@@ -81,6 +92,15 @@ func (o *ChunkedJoin) Execute(ctx context.Context, e *exec.Executor) error {
 	return fut.Wait(ctx)
 }
 
+func (o *ChunkedJoin) String() string {
+	return fmt.Sprintf(
+		"ChunkedJoin(chunkSize=%v), (%v) -> %v",
+		o.ChunkSize,
+		utils.FormatVarIDs(o.Inputs),
+		o.Output.ID,
+	)
+}
+
 type ChunkedSplitType struct {
 	OutputCount int
 	ChunkSize   int
diff --git a/common/pkgs/ioswitch2/ops2/clone.go b/common/pkgs/ioswitch2/ops2/clone.go
index d577b53..45129a8 100644
--- a/common/pkgs/ioswitch2/ops2/clone.go
+++ b/common/pkgs/ioswitch2/ops2/clone.go
@@ -8,6 +8,7 @@ import (
 	"github.com/samber/lo"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/dag"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/utils"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	"golang.org/x/sync/semaphore"
 )
@@ -18,30 +19,34 @@ func init() {
 }
 
 type CloneStream struct {
-	Input   *exec.StreamVar   `json:"input"`
-	Outputs []*exec.StreamVar `json:"outputs"`
+	Raw     *exec.StreamVar   `json:"raw"`
+	Cloneds []*exec.StreamVar `json:"cloneds"`
 }
 
 func (o *CloneStream) Execute(ctx context.Context, e *exec.Executor) error {
-	err := e.BindVars(ctx, o.Input)
+	err := e.BindVars(ctx, o.Raw)
 	if err != nil {
 		return err
 	}
-	defer o.Input.Stream.Close()
+	defer o.Raw.Stream.Close()
 
-	cloned := io2.Clone(o.Input.Stream, len(o.Outputs))
+	cloned := io2.Clone(o.Raw.Stream, len(o.Cloneds))
 
-	sem := semaphore.NewWeighted(int64(len(o.Outputs)))
+	sem := semaphore.NewWeighted(int64(len(o.Cloneds)))
 	for i, s := range cloned {
 		sem.Acquire(ctx, 1)
 
-		o.Outputs[i].Stream = io2.AfterReadClosedOnce(s, func(closer io.ReadCloser) {
+		o.Cloneds[i].Stream = io2.AfterReadClosedOnce(s, func(closer io.ReadCloser) {
 			sem.Release(1)
 		})
 	}
-	exec.PutArrayVars(e, o.Outputs)
+	exec.PutArrayVars(e, o.Cloneds)
+
+	return sem.Acquire(ctx, int64(len(o.Cloneds)))
+}
 
-	return sem.Acquire(ctx, int64(len(o.Outputs)))
+func (o *CloneStream) String() string {
+	return fmt.Sprintf("CloneStream %v -> (%v)", o.Raw.ID, utils.FormatVarIDs(o.Cloneds))
 }
 
 type CloneVar struct {
@@ -65,6 +70,10 @@ func (o *CloneVar) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *CloneVar) String() string {
+	return fmt.Sprintf("CloneStream %v -> (%v)", o.Raw.GetID(), utils.FormatVarIDs(o.Cloneds))
+}
+
 type CloneStreamType struct{}
 
 func (t *CloneStreamType) InitNode(node *dag.Node) {
@@ -73,8 +82,8 @@ func (t *CloneStreamType) InitNode(node *dag.Node) {
 
 func (t *CloneStreamType) GenerateOp(op *dag.Node) (exec.Op, error) {
 	return &CloneStream{
-		Input: op.InputStreams[0].Var,
-		Outputs: lo.Map(op.OutputStreams, func(v *dag.StreamVar, idx int) *exec.StreamVar {
+		Raw: op.InputStreams[0].Var,
+		Cloneds: lo.Map(op.OutputStreams, func(v *dag.StreamVar, idx int) *exec.StreamVar {
 			return v.Var
 		}),
 	}, nil
diff --git a/common/pkgs/ioswitch2/ops2/ec.go b/common/pkgs/ioswitch2/ops2/ec.go
index 192d79d..32f8163 100644
--- a/common/pkgs/ioswitch2/ops2/ec.go
+++ b/common/pkgs/ioswitch2/ops2/ec.go
@@ -9,6 +9,7 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/future"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/dag"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/utils"
 	cdssdk "gitlink.org.cn/cloudream/common/sdks/storage"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	"gitlink.org.cn/cloudream/common/utils/sync2"
@@ -18,8 +19,8 @@ import (
 )
 
 func init() {
-	exec.UseOp[*ECReconstructAny]()
-	exec.UseOp[*ECReconstruct]()
+	// exec.UseOp[*ECReconstructAny]()
+	// exec.UseOp[*ECReconstruct]()
 	exec.UseOp[*ECMultiply]()
 }
 
@@ -194,6 +195,15 @@ func (o *ECMultiply) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *ECMultiply) String() string {
+	return fmt.Sprintf(
+		"ECMultiply(coef=%v) (%v) -> (%v)",
+		o.Coef,
+		utils.FormatVarIDs(o.Inputs),
+		utils.FormatVarIDs(o.Outputs),
+	)
+}
+
 type MultiplyType struct {
 	EC            cdssdk.ECRedundancy
 	InputIndexes  []int
diff --git a/common/pkgs/ioswitch2/ops2/file.go b/common/pkgs/ioswitch2/ops2/file.go
index cc6f46c..b6bd994 100644
--- a/common/pkgs/ioswitch2/ops2/file.go
+++ b/common/pkgs/ioswitch2/ops2/file.go
@@ -51,6 +51,10 @@ func (o *FileWrite) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *FileWrite) String() string {
+	return fmt.Sprintf("FileWrite %v -> %s", o.Input.ID, o.FilePath)
+}
+
 type FileRead struct {
 	Output   *exec.StreamVar `json:"output"`
 	FilePath string          `json:"filePath"`
@@ -72,6 +76,10 @@ func (o *FileRead) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *FileRead) String() string {
+	return fmt.Sprintf("FileRead %s -> %v", o.FilePath, o.Output.ID)
+}
+
 type FileReadType struct {
 	FilePath string
 }
diff --git a/common/pkgs/ioswitch2/ops2/ipfs.go b/common/pkgs/ioswitch2/ops2/ipfs.go
index 303157a..d6604e7 100644
--- a/common/pkgs/ioswitch2/ops2/ipfs.go
+++ b/common/pkgs/ioswitch2/ops2/ipfs.go
@@ -53,6 +53,10 @@ func (o *IPFSRead) Execute(ctx context.Context, e *exec.Executor) error {
 	return fut.Wait(ctx)
 }
 
+func (o *IPFSRead) String() string {
+	return fmt.Sprintf("IPFSRead %v -> %v", o.FileHash, o.Output.ID)
+}
+
 type IPFSWrite struct {
 	Input    *exec.StreamVar `json:"input"`
 	FileHash *exec.StringVar `json:"fileHash"`
@@ -86,6 +90,10 @@ func (o *IPFSWrite) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *IPFSWrite) String() string {
+	return fmt.Sprintf("IPFSWrite %v -> %v", o.Input.ID, o.FileHash.ID)
+}
+
 type IPFSReadType struct {
 	FileHash string
 	Option   ipfs.ReadOption
diff --git a/common/pkgs/ioswitch2/ops2/range.go b/common/pkgs/ioswitch2/ops2/range.go
index 383b3c0..8e68238 100644
--- a/common/pkgs/ioswitch2/ops2/range.go
+++ b/common/pkgs/ioswitch2/ops2/range.go
@@ -72,6 +72,10 @@ func (o *Range) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *Range) String() string {
+	return fmt.Sprintf("Range(%v+%v) %v -> %v", o.Offset, o.Length, o.Input.ID, o.Output.ID)
+}
+
 type RangeType struct {
 	Range exec.Range
 }
diff --git a/common/pkgs/ioswitchlrc/agent_worker.go b/common/pkgs/ioswitchlrc/agent_worker.go
index 67b084f..81b280f 100644
--- a/common/pkgs/ioswitchlrc/agent_worker.go
+++ b/common/pkgs/ioswitchlrc/agent_worker.go
@@ -5,11 +5,17 @@ import (
 	"io"
 
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/types"
 	cdssdk "gitlink.org.cn/cloudream/common/sdks/storage"
+	"gitlink.org.cn/cloudream/common/utils/serder"
 	stgglb "gitlink.org.cn/cloudream/storage/common/globals"
 	agtrpc "gitlink.org.cn/cloudream/storage/common/pkgs/grpc/agent"
 )
 
+var _ = serder.UseTypeUnionExternallyTagged(types.Ref(types.NewTypeUnion[exec.WorkerInfo](
+	(*AgentWorker)(nil),
+)))
+
 type AgentWorker struct {
 	Node cdssdk.Node
 }
diff --git a/common/pkgs/ioswitchlrc/ops2/chunked.go b/common/pkgs/ioswitchlrc/ops2/chunked.go
index 18090a4..33ae0e6 100644
--- a/common/pkgs/ioswitchlrc/ops2/chunked.go
+++ b/common/pkgs/ioswitchlrc/ops2/chunked.go
@@ -9,8 +9,9 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/future"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/dag"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/utils"
 	"gitlink.org.cn/cloudream/common/utils/io2"
-	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
 	"golang.org/x/sync/semaphore"
 )
 
@@ -50,6 +51,16 @@ func (o *ChunkedSplit) Execute(ctx context.Context, e *exec.Executor) error {
 	return sem.Acquire(ctx, int64(len(outputs)))
 }
 
+func (o *ChunkedSplit) String() string {
+	return fmt.Sprintf(
+		"ChunkedSplit(chunkSize=%v, paddingZeros=%v), %v -> (%v)",
+		o.ChunkSize,
+		o.PaddingZeros,
+		o.Input.ID,
+		utils.FormatVarIDs(o.Outputs),
+	)
+}
+
 type ChunkedJoin struct {
 	Inputs    []*exec.StreamVar `json:"inputs"`
 	Output    *exec.StreamVar   `json:"output"`
@@ -81,6 +92,15 @@ func (o *ChunkedJoin) Execute(ctx context.Context, e *exec.Executor) error {
 	return fut.Wait(ctx)
 }
 
+func (o *ChunkedJoin) String() string {
+	return fmt.Sprintf(
+		"ChunkedJoin(chunkSize=%v), (%v) -> %v",
+		o.ChunkSize,
+		utils.FormatVarIDs(o.Inputs),
+		o.Output.ID,
+	)
+}
+
 type ChunkedSplitType struct {
 	OutputCount int
 	ChunkSize   int
@@ -89,7 +109,7 @@ type ChunkedSplitType struct {
 func (t *ChunkedSplitType) InitNode(node *dag.Node) {
 	dag.NodeDeclareInputStream(node, 1)
 	for i := 0; i < t.OutputCount; i++ {
-		dag.NodeNewOutputStream(node, &ioswitch2.VarProps{
+		dag.NodeNewOutputStream(node, &ioswitchlrc.VarProps{
 			StreamIndex: i,
 		})
 	}
@@ -117,7 +137,7 @@ type ChunkedJoinType struct {
 
 func (t *ChunkedJoinType) InitNode(node *dag.Node) {
 	dag.NodeDeclareInputStream(node, t.InputCount)
-	dag.NodeNewOutputStream(node, &ioswitch2.VarProps{
+	dag.NodeNewOutputStream(node, &ioswitchlrc.VarProps{
 		StreamIndex: -1,
 	})
 }
diff --git a/common/pkgs/ioswitchlrc/ops2/clone.go b/common/pkgs/ioswitchlrc/ops2/clone.go
index d577b53..45129a8 100644
--- a/common/pkgs/ioswitchlrc/ops2/clone.go
+++ b/common/pkgs/ioswitchlrc/ops2/clone.go
@@ -8,6 +8,7 @@ import (
 	"github.com/samber/lo"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/dag"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/utils"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	"golang.org/x/sync/semaphore"
 )
@@ -18,30 +19,34 @@ func init() {
 }
 
 type CloneStream struct {
-	Input   *exec.StreamVar   `json:"input"`
-	Outputs []*exec.StreamVar `json:"outputs"`
+	Raw     *exec.StreamVar   `json:"raw"`
+	Cloneds []*exec.StreamVar `json:"cloneds"`
 }
 
 func (o *CloneStream) Execute(ctx context.Context, e *exec.Executor) error {
-	err := e.BindVars(ctx, o.Input)
+	err := e.BindVars(ctx, o.Raw)
 	if err != nil {
 		return err
 	}
-	defer o.Input.Stream.Close()
+	defer o.Raw.Stream.Close()
 
-	cloned := io2.Clone(o.Input.Stream, len(o.Outputs))
+	cloned := io2.Clone(o.Raw.Stream, len(o.Cloneds))
 
-	sem := semaphore.NewWeighted(int64(len(o.Outputs)))
+	sem := semaphore.NewWeighted(int64(len(o.Cloneds)))
 	for i, s := range cloned {
 		sem.Acquire(ctx, 1)
 
-		o.Outputs[i].Stream = io2.AfterReadClosedOnce(s, func(closer io.ReadCloser) {
+		o.Cloneds[i].Stream = io2.AfterReadClosedOnce(s, func(closer io.ReadCloser) {
 			sem.Release(1)
 		})
 	}
-	exec.PutArrayVars(e, o.Outputs)
+	exec.PutArrayVars(e, o.Cloneds)
+
+	return sem.Acquire(ctx, int64(len(o.Cloneds)))
+}
 
-	return sem.Acquire(ctx, int64(len(o.Outputs)))
+func (o *CloneStream) String() string {
+	return fmt.Sprintf("CloneStream %v -> (%v)", o.Raw.ID, utils.FormatVarIDs(o.Cloneds))
 }
 
 type CloneVar struct {
@@ -65,6 +70,10 @@ func (o *CloneVar) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *CloneVar) String() string {
+	return fmt.Sprintf("CloneStream %v -> (%v)", o.Raw.GetID(), utils.FormatVarIDs(o.Cloneds))
+}
+
 type CloneStreamType struct{}
 
 func (t *CloneStreamType) InitNode(node *dag.Node) {
@@ -73,8 +82,8 @@ func (t *CloneStreamType) InitNode(node *dag.Node) {
 
 func (t *CloneStreamType) GenerateOp(op *dag.Node) (exec.Op, error) {
 	return &CloneStream{
-		Input: op.InputStreams[0].Var,
-		Outputs: lo.Map(op.OutputStreams, func(v *dag.StreamVar, idx int) *exec.StreamVar {
+		Raw: op.InputStreams[0].Var,
+		Cloneds: lo.Map(op.OutputStreams, func(v *dag.StreamVar, idx int) *exec.StreamVar {
 			return v.Var
 		}),
 	}, nil
diff --git a/common/pkgs/ioswitchlrc/ops2/ec.go b/common/pkgs/ioswitchlrc/ops2/ec.go
index 7d644d4..01ed734 100644
--- a/common/pkgs/ioswitchlrc/ops2/ec.go
+++ b/common/pkgs/ioswitchlrc/ops2/ec.go
@@ -9,12 +9,12 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/future"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/dag"
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
+	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/utils"
 	cdssdk "gitlink.org.cn/cloudream/common/sdks/storage"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	"gitlink.org.cn/cloudream/common/utils/sync2"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ec"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ec/lrc"
-	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
 )
 
@@ -106,27 +106,29 @@ func (o *GalMultiply) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *GalMultiply) String() string {
+	return fmt.Sprintf(
+		"ECMultiply(coef=%v) (%v) -> (%v)",
+		o.Coef,
+		utils.FormatVarIDs(o.Inputs),
+		utils.FormatVarIDs(o.Outputs),
+	)
+}
+
 type LRCConstructAnyType struct {
-	LRC cdssdk.LRCRedundancy
+	LRC           cdssdk.LRCRedundancy
+	InputIndexes  []int
+	OutputIndexes []int
 }
 
 func (t *LRCConstructAnyType) InitNode(node *dag.Node) {}
 
 func (t *LRCConstructAnyType) GenerateOp(op *dag.Node) (exec.Op, error) {
-	var inputIdxs []int
-	var outputIdxs []int
-	for _, in := range op.InputStreams {
-		inputIdxs = append(inputIdxs, ioswitch2.SProps(in).StreamIndex)
-	}
-	for _, out := range op.OutputStreams {
-		outputIdxs = append(outputIdxs, ioswitch2.SProps(out).StreamIndex)
-	}
-
 	l, err := lrc.New(t.LRC.N, t.LRC.K, t.LRC.Groups)
 	if err != nil {
 		return nil, err
 	}
-	coef, err := l.GenerateMatrix(inputIdxs, outputIdxs)
+	coef, err := l.GenerateMatrix(t.InputIndexes, t.OutputIndexes)
 	if err != nil {
 		return nil, err
 	}
@@ -139,13 +141,23 @@ func (t *LRCConstructAnyType) GenerateOp(op *dag.Node) (exec.Op, error) {
 	}, nil
 }
 
-func (t *LRCConstructAnyType) AddInput(node *dag.Node, str *dag.StreamVar) {
+func (t *LRCConstructAnyType) AddInput(node *dag.Node, str *dag.StreamVar, dataIndex int) {
+	t.InputIndexes = append(t.InputIndexes, dataIndex)
 	node.InputStreams = append(node.InputStreams, str)
 	str.To(node, len(node.InputStreams)-1)
 }
 
+func (t *LRCConstructAnyType) RemoveAllInputs(n *dag.Node) {
+	for _, in := range n.InputStreams {
+		in.From.Node.OutputStreams[in.From.SlotIndex].NotTo(n)
+	}
+	n.InputStreams = nil
+	t.InputIndexes = nil
+}
+
 func (t *LRCConstructAnyType) NewOutput(node *dag.Node, dataIndex int) *dag.StreamVar {
-	return dag.NodeNewOutputStream(node, &ioswitch2.VarProps{StreamIndex: dataIndex})
+	t.OutputIndexes = append(t.OutputIndexes, dataIndex)
+	return dag.NodeNewOutputStream(node, &ioswitchlrc.VarProps{StreamIndex: dataIndex})
 }
 
 func (t *LRCConstructAnyType) String(node *dag.Node) string {
diff --git a/common/pkgs/ioswitchlrc/ops2/ipfs.go b/common/pkgs/ioswitchlrc/ops2/ipfs.go
index 303157a..3ccdc3d 100644
--- a/common/pkgs/ioswitchlrc/ops2/ipfs.go
+++ b/common/pkgs/ioswitchlrc/ops2/ipfs.go
@@ -12,7 +12,7 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/logger"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	stgglb "gitlink.org.cn/cloudream/storage/common/globals"
-	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
 )
 
 func init() {
@@ -53,6 +53,10 @@ func (o *IPFSRead) Execute(ctx context.Context, e *exec.Executor) error {
 	return fut.Wait(ctx)
 }
 
+func (o *IPFSRead) String() string {
+	return fmt.Sprintf("IPFSRead %v -> %v", o.FileHash, o.Output.ID)
+}
+
 type IPFSWrite struct {
 	Input    *exec.StreamVar `json:"input"`
 	FileHash *exec.StringVar `json:"fileHash"`
@@ -86,13 +90,17 @@ func (o *IPFSWrite) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *IPFSWrite) String() string {
+	return fmt.Sprintf("IPFSWrite %v -> %v", o.Input.ID, o.FileHash.ID)
+}
+
 type IPFSReadType struct {
 	FileHash string
 	Option   ipfs.ReadOption
 }
 
 func (t *IPFSReadType) InitNode(node *dag.Node) {
-	dag.NodeNewOutputStream(node, &ioswitch2.VarProps{})
+	dag.NodeNewOutputStream(node, &ioswitchlrc.VarProps{})
 }
 
 func (t *IPFSReadType) GenerateOp(n *dag.Node) (exec.Op, error) {
@@ -114,7 +122,7 @@ type IPFSWriteType struct {
 
 func (t *IPFSWriteType) InitNode(node *dag.Node) {
 	dag.NodeDeclareInputStream(node, 1)
-	dag.NodeNewOutputValue(node, dag.StringValueVar, &ioswitch2.VarProps{})
+	dag.NodeNewOutputValue(node, dag.StringValueVar, &ioswitchlrc.VarProps{})
 }
 
 func (t *IPFSWriteType) GenerateOp(op *dag.Node) (exec.Op, error) {
diff --git a/common/pkgs/ioswitchlrc/ops2/range.go b/common/pkgs/ioswitchlrc/ops2/range.go
index 383b3c0..5d97155 100644
--- a/common/pkgs/ioswitchlrc/ops2/range.go
+++ b/common/pkgs/ioswitchlrc/ops2/range.go
@@ -10,7 +10,7 @@ import (
 	"gitlink.org.cn/cloudream/common/pkgs/ioswitch/exec"
 	"gitlink.org.cn/cloudream/common/utils/io2"
 	"gitlink.org.cn/cloudream/common/utils/math2"
-	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
 )
 
 func init() {
@@ -72,13 +72,17 @@ func (o *Range) Execute(ctx context.Context, e *exec.Executor) error {
 	return nil
 }
 
+func (o *Range) String() string {
+	return fmt.Sprintf("Range(%v+%v) %v -> %v", o.Offset, o.Length, o.Input.ID, o.Output.ID)
+}
+
 type RangeType struct {
 	Range exec.Range
 }
 
 func (t *RangeType) InitNode(node *dag.Node) {
 	dag.NodeDeclareInputStream(node, 1)
-	dag.NodeNewOutputStream(node, &ioswitch2.VarProps{})
+	dag.NodeNewOutputStream(node, &ioswitchlrc.VarProps{})
 }
 
 func (t *RangeType) GenerateOp(n *dag.Node) (exec.Op, error) {
diff --git a/common/pkgs/ioswitchlrc/parser/generator.go b/common/pkgs/ioswitchlrc/parser/generator.go
index 97b4b8c..cabe84b 100644
--- a/common/pkgs/ioswitchlrc/parser/generator.go
+++ b/common/pkgs/ioswitchlrc/parser/generator.go
@@ -60,18 +60,15 @@ func buildDAGEncode(ctx *GenerateContext, fr ioswitchlrc.From, toes []ioswitchlr
 
 	// 先创建需要完整文件的To节点，同时统计一下需要哪些文件块
 	for _, to := range toes {
-		if to.GetDataIndex() != -1 {
-			continue
-		}
-
-		toNode, err := buildToNode(ctx, to)
-		if err != nil {
-			return fmt.Errorf("building to node: %w", err)
-		}
-
 		idx := to.GetDataIndex()
 		if idx == -1 {
+			toNode, err := buildToNode(ctx, to)
+			if err != nil {
+				return fmt.Errorf("building to node: %w", err)
+			}
+
 			frNode.OutputStreams[0].To(toNode, 0)
+
 		} else if idx < ctx.LRC.K {
 			dataToes = append(dataToes, to)
 		} else {
@@ -87,7 +84,8 @@ func buildDAGEncode(ctx *GenerateContext, fr ioswitchlrc.From, toes []ioswitchlr
 	splitNode := ctx.DAG.NewNode(&ops2.ChunkedSplitType{
 		OutputCount: ctx.LRC.K,
 		ChunkSize:   ctx.LRC.ChunkSize,
-	}, nil)
+	}, &ioswitchlrc.NodeProps{})
+	frNode.OutputStreams[0].To(splitNode, 0)
 
 	for _, to := range dataToes {
 		toNode, err := buildToNode(ctx, to)
@@ -106,10 +104,10 @@ func buildDAGEncode(ctx *GenerateContext, fr ioswitchlrc.From, toes []ioswitchlr
 
 	conNode, conType := dag.NewNode(ctx.DAG, &ops2.LRCConstructAnyType{
 		LRC: ctx.LRC,
-	}, nil)
+	}, &ioswitchlrc.NodeProps{})
 
 	for _, out := range splitNode.OutputStreams {
-		conType.AddInput(conNode, out)
+		conType.AddInput(conNode, out, ioswitchlrc.SProps(out).StreamIndex)
 	}
 
 	for _, to := range parityToes {
@@ -193,10 +191,10 @@ func buildDAGReconstructAny(ctx *GenerateContext, frs []ioswitchlrc.From, toes [
 
 	conNode, conType := dag.NewNode(ctx.DAG, &ops2.LRCConstructAnyType{
 		LRC: ctx.LRC,
-	}, nil)
+	}, &ioswitchlrc.NodeProps{})
 
 	for _, fr := range frNodes {
-		conType.AddInput(conNode, fr.OutputStreams[0])
+		conType.AddInput(conNode, fr.OutputStreams[0], ioswitchlrc.SProps(fr.OutputStreams[0]).StreamIndex)
 	}
 
 	for _, to := range missedToes {
@@ -217,7 +215,7 @@ func buildDAGReconstructAny(ctx *GenerateContext, frs []ioswitchlrc.From, toes [
 	joinNode := ctx.DAG.NewNode(&ops2.ChunkedJoinType{
 		InputCount: ctx.LRC.K,
 		ChunkSize:  ctx.LRC.ChunkSize,
-	}, nil)
+	}, &ioswitchlrc.NodeProps{})
 
 	for i := 0; i < ctx.LRC.K; i++ {
 		n := frNodes[i]
@@ -237,6 +235,12 @@ func buildDAGReconstructAny(ctx *GenerateContext, frs []ioswitchlrc.From, toes [
 		joinNode.OutputStreams[0].To(toNode, 0)
 	}
 
+	// 如果不需要Construct任何块，则删除这个节点
+	if len(conNode.OutputStreams) == 0 {
+		conType.RemoveAllInputs(conNode)
+		ctx.DAG.RemoveNode(conNode)
+	}
+
 	return nil
 }
 
@@ -273,7 +277,7 @@ func buildDAGReconstructGroup(ctx *GenerateContext, frs []ioswitchlrc.From, toes
 	conNode := ctx.DAG.NewNode(&ops2.LRCConstructGroupType{
 		LRC:              ctx.LRC,
 		TargetBlockIndex: missedGrpIdx,
-	}, nil)
+	}, &ioswitchlrc.NodeProps{})
 
 	for i, fr := range frs {
 		frNode, err := buildFromNode(ctx, fr)
diff --git a/common/pkgs/ioswitchlrc/parser/passes.go b/common/pkgs/ioswitchlrc/parser/passes.go
index 984cae2..d59f54f 100644
--- a/common/pkgs/ioswitchlrc/parser/passes.go
+++ b/common/pkgs/ioswitchlrc/parser/passes.go
@@ -225,12 +225,12 @@ func storeIPFSWriteResult(ctx *GenerateContext) {
 			return true
 		}
 
-		n := ctx.DAG.NewNode(&ops.StoreType{
+		n, t := dag.NewNode(ctx.DAG, &ops.StoreType{
 			StoreKey: typ.FileHashStoreKey,
 		}, &ioswitchlrc.NodeProps{})
 		n.Env.ToEnvDriver()
 
-		node.OutputValues[0].To(n, 0)
+		t.Store(n, node.OutputValues[0])
 		return true
 	})
 }
@@ -293,7 +293,9 @@ func generateClone(ctx *GenerateContext) {
 			n, t := dag.NewNode(ctx.DAG, &ops2.CloneStreamType{}, &ioswitchlrc.NodeProps{})
 			n.Env = node.Env
 			for _, to := range out.Toes {
-				t.NewOutput(node).To(to.Node, to.SlotIndex)
+				str := t.NewOutput(n)
+				str.Props = &ioswitchlrc.VarProps{StreamIndex: ioswitchlrc.SProps(out).StreamIndex}
+				str.To(to.Node, to.SlotIndex)
 			}
 			out.Toes = nil
 			out.To(n, 0)
diff --git a/scanner/internal/event/check_package_redundancy.go b/scanner/internal/event/check_package_redundancy.go
index 066495e..92e42d0 100644
--- a/scanner/internal/event/check_package_redundancy.go
+++ b/scanner/internal/event/check_package_redundancy.go
@@ -16,6 +16,8 @@ import (
 	"gitlink.org.cn/cloudream/storage/common/pkgs/distlock/reqbuilder"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2"
 	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitch2/parser"
+	"gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc"
+	lrcparser "gitlink.org.cn/cloudream/storage/common/pkgs/ioswitchlrc/parser"
 	agtmq "gitlink.org.cn/cloudream/storage/common/pkgs/mq/agent"
 	coormq "gitlink.org.cn/cloudream/storage/common/pkgs/mq/coordinator"
 	scevt "gitlink.org.cn/cloudream/storage/common/pkgs/mq/scanner/event"
@@ -91,15 +93,15 @@ func (t *CheckPackageRedundancy) Execute(execCtx ExecuteContext) {
 		return
 	}
 
-	allNodes := make(map[cdssdk.NodeID]*NodeLoadInfo)
+	userAllNodes := make(map[cdssdk.NodeID]*NodeLoadInfo)
 	for _, node := range getNodes.Nodes {
-		allNodes[node.NodeID] = &NodeLoadInfo{
+		userAllNodes[node.NodeID] = &NodeLoadInfo{
 			Node: node,
 		}
 	}
 
 	for _, log := range getLogs.Logs {
-		info, ok := allNodes[log.Storage.NodeID]
+		info, ok := userAllNodes[log.Storage.NodeID]
 		if !ok {
 			continue
 		}
@@ -118,10 +120,11 @@ func (t *CheckPackageRedundancy) Execute(execCtx ExecuteContext) {
 	defEC := cdssdk.DefaultECRedundancy
 
 	// TODO 目前rep的备份数量固定为2，所以这里直接选出两个节点
+	// TODO 放到chooseRedundancy函数中
 	mostBlockNodeIDs := t.summaryRepObjectBlockNodes(getObjs.Objects, 2)
-	newRepNodes := t.chooseNewNodesForRep(&defRep, allNodes)
-	rechoosedRepNodes := t.rechooseNodesForRep(mostBlockNodeIDs, &defRep, allNodes)
-	newECNodes := t.chooseNewNodesForEC(&defEC, allNodes)
+	newRepNodes := t.chooseNewNodesForRep(&defRep, userAllNodes)
+	rechoosedRepNodes := t.rechooseNodesForRep(mostBlockNodeIDs, &defRep, userAllNodes)
+	newECNodes := t.chooseNewNodesForEC(&defEC, userAllNodes)
 
 	// 加锁
 	builder := reqbuilder.NewBuilder()
@@ -142,33 +145,50 @@ func (t *CheckPackageRedundancy) Execute(execCtx ExecuteContext) {
 		var updating *coormq.UpdatingObjectRedundancy
 		var err error
 
-		shouldUseEC := obj.Object.Size > config.Cfg().ECFileSizeThreshold
+		newRed, selectedNodes := t.chooseRedundancy(obj, userAllNodes)
 
-		switch red := obj.Object.Redundancy.(type) {
+		switch srcRed := obj.Object.Redundancy.(type) {
 		case *cdssdk.NoneRedundancy:
-			if shouldUseEC {
-				log.WithField("ObjectID", obj.Object.ObjectID).Debugf("redundancy: none -> ec")
-				updating, err = t.noneToEC(obj, &defEC, newECNodes)
-			} else {
+			switch newRed := newRed.(type) {
+			case *cdssdk.RepRedundancy:
 				log.WithField("ObjectID", obj.Object.ObjectID).Debugf("redundancy: none -> rep")
-				updating, err = t.noneToRep(obj, &defRep, newRepNodes)
+				updating, err = t.noneToRep(obj, newRed, newRepNodes)
+
+			case *cdssdk.ECRedundancy:
+				log.WithField("ObjectID", obj.Object.ObjectID).Debugf("redundancy: none -> ec")
+				updating, err = t.noneToEC(obj, newRed, newECNodes)
+
+			case *cdssdk.LRCRedundancy:
+				log.WithField("ObjectID", obj.Object.ObjectID).Debugf("redundancy: none -> lrc")
+				updating, err = t.noneToLRC(obj, newRed, selectedNodes)
 			}
 
 		case *cdssdk.RepRedundancy:
-			if shouldUseEC {
+			switch newRed := newRed.(type) {
+			case *cdssdk.RepRedundancy:
+				updating, err = t.repToRep(obj, srcRed, rechoosedRepNodes)
+
+			case *cdssdk.ECRedundancy:
 				log.WithField("ObjectID", obj.Object.ObjectID).Debugf("redundancy: rep -> ec")
-				updating, err = t.repToEC(obj, &defEC, newECNodes)
-			} else {
-				updating, err = t.repToRep(obj, &defRep, rechoosedRepNodes)
+				updating, err = t.repToEC(obj, newRed, newECNodes)
 			}
 
 		case *cdssdk.ECRedundancy:
-			if shouldUseEC {
-				uploadNodes := t.rechooseNodesForEC(obj, red, allNodes)
-				updating, err = t.ecToEC(obj, red, &defEC, uploadNodes)
-			} else {
+			switch newRed := newRed.(type) {
+			case *cdssdk.RepRedundancy:
 				log.WithField("ObjectID", obj.Object.ObjectID).Debugf("redundancy: ec -> rep")
-				updating, err = t.ecToRep(obj, red, &defRep, newRepNodes)
+				updating, err = t.ecToRep(obj, srcRed, newRed, newRepNodes)
+
+			case *cdssdk.ECRedundancy:
+				uploadNodes := t.rechooseNodesForEC(obj, srcRed, userAllNodes)
+				updating, err = t.ecToEC(obj, srcRed, newRed, uploadNodes)
+			}
+
+		case *cdssdk.LRCRedundancy:
+			switch newRed := newRed.(type) {
+			case *cdssdk.LRCRedundancy:
+				uploadNodes := t.rechooseNodesForLRC(obj, srcRed, userAllNodes)
+				updating, err = t.lrcToLRC(obj, srcRed, newRed, uploadNodes)
 			}
 		}
 
@@ -192,6 +212,20 @@ func (t *CheckPackageRedundancy) Execute(execCtx ExecuteContext) {
 	}
 }
 
+func (t *CheckPackageRedundancy) chooseRedundancy(obj stgmod.ObjectDetail, userAllNodes map[cdssdk.NodeID]*NodeLoadInfo) (cdssdk.Redundancy, []*NodeLoadInfo) {
+	switch obj.Object.Redundancy.(type) {
+	case *cdssdk.NoneRedundancy:
+		newLRCNodes := t.chooseNewNodesForLRC(&cdssdk.DefaultLRCRedundancy, userAllNodes)
+		return &cdssdk.DefaultLRCRedundancy, newLRCNodes
+
+	case *cdssdk.LRCRedundancy:
+		newLRCNodes := t.rechooseNodesForLRC(obj, &cdssdk.DefaultLRCRedundancy, userAllNodes)
+		return &cdssdk.DefaultLRCRedundancy, newLRCNodes
+
+	}
+	return nil, nil
+}
+
 // 统计每个对象块所在的节点，选出块最多的不超过nodeCnt个节点
 func (t *CheckPackageRedundancy) summaryRepObjectBlockNodes(objs []stgmod.ObjectDetail, nodeCnt int) []cdssdk.NodeID {
 	type nodeBlocks struct {
@@ -253,6 +287,19 @@ func (t *CheckPackageRedundancy) chooseNewNodesForEC(red *cdssdk.ECRedundancy, a
 	return t.chooseSoManyNodes(red.N, sortedNodes)
 }
 
+func (t *CheckPackageRedundancy) chooseNewNodesForLRC(red *cdssdk.LRCRedundancy, allNodes map[cdssdk.NodeID]*NodeLoadInfo) []*NodeLoadInfo {
+	sortedNodes := sort2.Sort(lo.Values(allNodes), func(left *NodeLoadInfo, right *NodeLoadInfo) int {
+		dm := right.LoadsRecentMonth - left.LoadsRecentMonth
+		if dm != 0 {
+			return dm
+		}
+
+		return right.LoadsRecentYear - left.LoadsRecentYear
+	})
+
+	return t.chooseSoManyNodes(red.N, sortedNodes)
+}
+
 func (t *CheckPackageRedundancy) rechooseNodesForRep(mostBlockNodeIDs []cdssdk.NodeID, red *cdssdk.RepRedundancy, allNodes map[cdssdk.NodeID]*NodeLoadInfo) []*NodeLoadInfo {
 	type rechooseNode struct {
 		*NodeLoadInfo
@@ -334,6 +381,47 @@ func (t *CheckPackageRedundancy) rechooseNodesForEC(obj stgmod.ObjectDetail, red
 	return t.chooseSoManyNodes(red.N, lo.Map(sortedNodes, func(node *rechooseNode, idx int) *NodeLoadInfo { return node.NodeLoadInfo }))
 }
 
+func (t *CheckPackageRedundancy) rechooseNodesForLRC(obj stgmod.ObjectDetail, red *cdssdk.LRCRedundancy, allNodes map[cdssdk.NodeID]*NodeLoadInfo) []*NodeLoadInfo {
+	type rechooseNode struct {
+		*NodeLoadInfo
+		CachedBlockIndex int
+	}
+
+	var rechooseNodes []*rechooseNode
+	for _, node := range allNodes {
+		cachedBlockIndex := -1
+		for _, block := range obj.Blocks {
+			if block.NodeID == node.Node.NodeID {
+				cachedBlockIndex = block.Index
+				break
+			}
+		}
+
+		rechooseNodes = append(rechooseNodes, &rechooseNode{
+			NodeLoadInfo:     node,
+			CachedBlockIndex: cachedBlockIndex,
+		})
+	}
+
+	sortedNodes := sort2.Sort(rechooseNodes, func(left *rechooseNode, right *rechooseNode) int {
+		dm := right.LoadsRecentMonth - left.LoadsRecentMonth
+		if dm != 0 {
+			return dm
+		}
+
+		// 已经缓存了文件块的节点优先选择
+		v := sort2.CmpBool(right.CachedBlockIndex > -1, left.CachedBlockIndex > -1)
+		if v != 0 {
+			return v
+		}
+
+		return right.LoadsRecentYear - left.LoadsRecentYear
+	})
+
+	// TODO 可以考虑选择已有块的节点时，能依然按照Index顺序选择
+	return t.chooseSoManyNodes(red.N, lo.Map(sortedNodes, func(node *rechooseNode, idx int) *NodeLoadInfo { return node.NodeLoadInfo }))
+}
+
 func (t *CheckPackageRedundancy) chooseSoManyNodes(count int, nodes []*NodeLoadInfo) []*NodeLoadInfo {
 	repeateCount := (count + len(nodes) - 1) / len(nodes)
 	extedNodes := make([]*NodeLoadInfo, repeateCount*len(nodes))
@@ -449,6 +537,55 @@ func (t *CheckPackageRedundancy) noneToEC(obj stgmod.ObjectDetail, red *cdssdk.E
 	}, nil
 }
 
+func (t *CheckPackageRedundancy) noneToLRC(obj stgmod.ObjectDetail, red *cdssdk.LRCRedundancy, uploadNodes []*NodeLoadInfo) (*coormq.UpdatingObjectRedundancy, error) {
+	coorCli, err := stgglb.CoordinatorMQPool.Acquire()
+	if err != nil {
+		return nil, fmt.Errorf("new coordinator client: %w", err)
+	}
+	defer stgglb.CoordinatorMQPool.Release(coorCli)
+
+	if len(obj.Blocks) == 0 {
+		return nil, fmt.Errorf("object is not cached on any nodes, cannot change its redundancy to ec")
+	}
+
+	getNodes, err := coorCli.GetNodes(coormq.NewGetNodes([]cdssdk.NodeID{obj.Blocks[0].NodeID}))
+	if err != nil {
+		return nil, fmt.Errorf("requesting to get nodes: %w", err)
+	}
+
+	var toes []ioswitchlrc.To
+	for i := 0; i < red.N; i++ {
+		toes = append(toes, ioswitchlrc.NewToNode(uploadNodes[i].Node, i, fmt.Sprintf("%d", i)))
+	}
+
+	plans := exec.NewPlanBuilder()
+	err = lrcparser.Encode(ioswitchlrc.NewFromNode(obj.Object.FileHash, &getNodes.Nodes[0], -1), toes, plans)
+	if err != nil {
+		return nil, fmt.Errorf("parsing plan: %w", err)
+	}
+
+	ioRet, err := plans.Execute().Wait(context.TODO())
+	if err != nil {
+		return nil, fmt.Errorf("executing io plan: %w", err)
+	}
+
+	var blocks []stgmod.ObjectBlock
+	for i := 0; i < red.N; i++ {
+		blocks = append(blocks, stgmod.ObjectBlock{
+			ObjectID: obj.Object.ObjectID,
+			Index:    i,
+			NodeID:   uploadNodes[i].Node.NodeID,
+			FileHash: ioRet[fmt.Sprintf("%d", i)].(string),
+		})
+	}
+
+	return &coormq.UpdatingObjectRedundancy{
+		ObjectID:   obj.Object.ObjectID,
+		Redundancy: red,
+		Blocks:     blocks,
+	}, nil
+}
+
 func (t *CheckPackageRedundancy) repToRep(obj stgmod.ObjectDetail, red *cdssdk.RepRedundancy, uploadNodes []*NodeLoadInfo) (*coormq.UpdatingObjectRedundancy, error) {
 	if len(obj.Blocks) == 0 {
 		return nil, fmt.Errorf("object is not cached on any nodes, cannot change its redundancy to rep")
@@ -652,6 +789,198 @@ func (t *CheckPackageRedundancy) ecToEC(obj stgmod.ObjectDetail, srcRed *cdssdk.
 	}, nil
 }
 
+func (t *CheckPackageRedundancy) lrcToLRC(obj stgmod.ObjectDetail, srcRed *cdssdk.LRCRedundancy, tarRed *cdssdk.LRCRedundancy, uploadNodes []*NodeLoadInfo) (*coormq.UpdatingObjectRedundancy, error) {
+	coorCli, err := stgglb.CoordinatorMQPool.Acquire()
+	if err != nil {
+		return nil, fmt.Errorf("new coordinator client: %w", err)
+	}
+	defer stgglb.CoordinatorMQPool.Release(coorCli)
+
+	blocksGrpByIndex := obj.GroupBlocks()
+
+	var lostBlocks []int
+	var lostBlockGrps []int
+	canGroupReconstruct := true
+
+	allBlockFlags := make([]bool, srcRed.N)
+	for _, block := range blocksGrpByIndex {
+		allBlockFlags[block.Index] = true
+	}
+
+	for i, ok := range allBlockFlags {
+		grpID := srcRed.FindGroup(i)
+		if !ok {
+			if grpID == -1 {
+				canGroupReconstruct = false
+				break
+			}
+
+			if len(lostBlocks) > 0 && lostBlockGrps[len(lostBlockGrps)-1] == grpID {
+				canGroupReconstruct = false
+				break
+			}
+
+			lostBlocks = append(lostBlocks, i)
+			lostBlockGrps = append(lostBlockGrps, grpID)
+		}
+	}
+
+	if canGroupReconstruct {
+		return t.groupReconstructLRC(obj, lostBlocks, lostBlockGrps, blocksGrpByIndex, srcRed, uploadNodes)
+	}
+
+	return t.reconstructLRC(obj, blocksGrpByIndex, srcRed, uploadNodes)
+}
+
+func (t *CheckPackageRedundancy) groupReconstructLRC(obj stgmod.ObjectDetail, lostBlocks []int, lostBlockGrps []int, grpedBlocks []stgmod.GrouppedObjectBlock, red *cdssdk.LRCRedundancy, uploadNodes []*NodeLoadInfo) (*coormq.UpdatingObjectRedundancy, error) {
+	grped := make(map[int]stgmod.GrouppedObjectBlock)
+	for _, b := range grpedBlocks {
+		grped[b.Index] = b
+	}
+
+	plans := exec.NewPlanBuilder()
+
+	for i := 0; i < len(lostBlocks); i++ {
+		var froms []ioswitchlrc.From
+		grpEles := red.GetGroupElements(lostBlockGrps[i])
+		for _, ele := range grpEles {
+			if ele == lostBlocks[i] {
+				continue
+			}
+
+			froms = append(froms, ioswitchlrc.NewFromNode(grped[ele].FileHash, nil, ele))
+		}
+
+		err := lrcparser.ReconstructGroup(froms, []ioswitchlrc.To{
+			ioswitchlrc.NewToNode(uploadNodes[i].Node, lostBlocks[i], fmt.Sprintf("%d", lostBlocks[i])),
+		}, plans)
+		if err != nil {
+			return nil, fmt.Errorf("parsing plan: %w", err)
+		}
+	}
+
+	fmt.Printf("plans: %v\n", plans)
+
+	// 如果没有任何Plan，Wait会直接返回成功
+	ret, err := plans.Execute().Wait(context.TODO())
+	if err != nil {
+		return nil, fmt.Errorf("executing io plan: %w", err)
+	}
+
+	var newBlocks []stgmod.ObjectBlock
+	for _, i := range lostBlocks {
+		newBlocks = append(newBlocks, stgmod.ObjectBlock{
+			ObjectID: obj.Object.ObjectID,
+			Index:    i,
+			NodeID:   uploadNodes[i].Node.NodeID,
+			FileHash: ret[fmt.Sprintf("%d", i)].(string),
+		})
+	}
+	for _, b := range grpedBlocks {
+		for _, nodeID := range b.NodeIDs {
+			newBlocks = append(newBlocks, stgmod.ObjectBlock{
+				ObjectID: obj.Object.ObjectID,
+				Index:    b.Index,
+				NodeID:   nodeID,
+				FileHash: b.FileHash,
+			})
+		}
+	}
+
+	return &coormq.UpdatingObjectRedundancy{
+		ObjectID:   obj.Object.ObjectID,
+		Redundancy: red,
+		Blocks:     newBlocks,
+	}, nil
+}
+
+func (t *CheckPackageRedundancy) reconstructLRC(obj stgmod.ObjectDetail, grpBlocks []stgmod.GrouppedObjectBlock, red *cdssdk.LRCRedundancy, uploadNodes []*NodeLoadInfo) (*coormq.UpdatingObjectRedundancy, error) {
+	var chosenBlocks []stgmod.GrouppedObjectBlock
+	for _, block := range grpBlocks {
+		if len(block.NodeIDs) > 0 && block.Index < red.M() {
+			chosenBlocks = append(chosenBlocks, block)
+		}
+
+		if len(chosenBlocks) == red.K {
+			break
+		}
+	}
+
+	if len(chosenBlocks) < red.K {
+		return nil, fmt.Errorf("no enough blocks to reconstruct the original file data")
+	}
+
+	// 目前LRC的参数都相同，所以可以不用重建出完整数据然后再分块，可以直接构建出目的节点需要的块
+	planBlder := exec.NewPlanBuilder()
+
+	var froms []ioswitchlrc.From
+	var toes []ioswitchlrc.To
+	var newBlocks []stgmod.ObjectBlock
+	shouldUpdateBlocks := false
+	for i, node := range uploadNodes {
+		newBlock := stgmod.ObjectBlock{
+			ObjectID: obj.Object.ObjectID,
+			Index:    i,
+			NodeID:   node.Node.NodeID,
+		}
+
+		grp, ok := lo.Find(grpBlocks, func(grp stgmod.GrouppedObjectBlock) bool { return grp.Index == i })
+
+		// 如果新选中的节点已经记录在Block表中，那么就不需要任何变更
+		if ok && lo.Contains(grp.NodeIDs, node.Node.NodeID) {
+			newBlock.FileHash = grp.FileHash
+			newBlocks = append(newBlocks, newBlock)
+			continue
+		}
+
+		shouldUpdateBlocks = true
+
+		// 否则就要重建出这个节点需要的块
+
+		for _, block := range chosenBlocks {
+			fmt.Printf("b: %v\n", block.Index)
+			froms = append(froms, ioswitchlrc.NewFromNode(block.FileHash, &node.Node, block.Index))
+		}
+
+		// 输出只需要自己要保存的那一块
+		toes = append(toes, ioswitchlrc.NewToNode(node.Node, i, fmt.Sprintf("%d", i)))
+
+		newBlocks = append(newBlocks, newBlock)
+	}
+
+	err := lrcparser.ReconstructAny(froms, toes, planBlder)
+	if err != nil {
+		return nil, fmt.Errorf("parsing plan: %w", err)
+	}
+
+	fmt.Printf("plans: %v\n", planBlder)
+
+	// 如果没有任何Plan，Wait会直接返回成功
+	ret, err := planBlder.Execute().Wait(context.TODO())
+	if err != nil {
+		return nil, fmt.Errorf("executing io plan: %w", err)
+	}
+
+	if !shouldUpdateBlocks {
+		return nil, nil
+	}
+
+	for k, v := range ret {
+		idx, err := strconv.ParseInt(k, 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("parsing result key %s as index: %w", k, err)
+		}
+
+		newBlocks[idx].FileHash = v.(string)
+	}
+
+	return &coormq.UpdatingObjectRedundancy{
+		ObjectID:   obj.Object.ObjectID,
+		Redundancy: red,
+		Blocks:     newBlocks,
+	}, nil
+}
+
 func (t *CheckPackageRedundancy) pinObject(nodeID cdssdk.NodeID, fileHash string) error {
 	agtCli, err := stgglb.AgentMQPool.Acquire(nodeID)
 	if err != nil {