diff --git a/weed/filer/filerstore.go b/weed/filer/filerstore.go
index 3ad7a787e..0843d506a 100644
--- a/weed/filer/filerstore.go
+++ b/weed/filer/filerstore.go
@@ -3,6 +3,7 @@ package filer
 import (
 	"context"
 	"errors"
+	"github.com/chrislusf/seaweedfs/weed/glog"
 	"strings"
 	"time"
 
@@ -85,6 +86,7 @@ func (fsw *FilerStoreWrapper) InsertEntry(ctx context.Context, entry *Entry) err
 		return err
 	}
 
+	glog.V(4).Infof("InsertEntry %s", entry.FullPath)
 	return fsw.ActualStore.InsertEntry(ctx, entry)
 }
 
@@ -104,6 +106,7 @@ func (fsw *FilerStoreWrapper) UpdateEntry(ctx context.Context, entry *Entry) err
 		return err
 	}
 
+	glog.V(4).Infof("UpdateEntry %s", entry.FullPath)
 	return fsw.ActualStore.UpdateEntry(ctx, entry)
 }
 
@@ -114,6 +117,7 @@ func (fsw *FilerStoreWrapper) FindEntry(ctx context.Context, fp util.FullPath) (
 		stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "find").Observe(time.Since(start).Seconds())
 	}()
 
+	glog.V(4).Infof("FindEntry %s", fp)
 	entry, err = fsw.ActualStore.FindEntry(ctx, fp)
 	if err != nil {
 		return nil, err
@@ -138,11 +142,13 @@ func (fsw *FilerStoreWrapper) DeleteEntry(ctx context.Context, fp util.FullPath)
 	}
 	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
+		glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
 		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 			return err
 		}
 	}
 
+	glog.V(4).Infof("DeleteEntry %s", fp)
 	return fsw.ActualStore.DeleteEntry(ctx, fp)
 }
 
@@ -155,11 +161,13 @@ func (fsw *FilerStoreWrapper) DeleteOneEntry(ctx context.Context, existingEntry
 
 	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
+		glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
 		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 			return err
 		}
 	}
 
+	glog.V(4).Infof("DeleteHaDeleteEntryrdLink %s", existingEntry.FullPath)
 	return fsw.ActualStore.DeleteEntry(ctx, existingEntry.FullPath)
 }
 
@@ -170,6 +178,7 @@ func (fsw *FilerStoreWrapper) DeleteFolderChildren(ctx context.Context, fp util.
 		stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "deleteFolderChildren").Observe(time.Since(start).Seconds())
 	}()
 
+	glog.V(4).Infof("DeleteFolderChildren %s", fp)
 	return fsw.ActualStore.DeleteFolderChildren(ctx, fp)
 }
 
@@ -180,6 +189,7 @@ func (fsw *FilerStoreWrapper) ListDirectoryEntries(ctx context.Context, dirPath
 		stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "list").Observe(time.Since(start).Seconds())
 	}()
 
+	glog.V(4).Infof("ListDirectoryEntries %s from %s limit %d", dirPath, startFileName, limit)
 	entries, err := fsw.ActualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit)
 	if err != nil {
 		return nil, err
@@ -197,6 +207,7 @@ func (fsw *FilerStoreWrapper) ListDirectoryPrefixedEntries(ctx context.Context,
 	defer func() {
 		stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "prefixList").Observe(time.Since(start).Seconds())
 	}()
+	glog.V(4).Infof("ListDirectoryPrefixedEntries %s from %s prefix %s limit %d", dirPath, startFileName, prefix, limit)
 	entries, err := fsw.ActualStore.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, prefix)
 	if err == ErrUnsupportedListDirectoryPrefixed {
 		entries, err = fsw.prefixFilterEntries(ctx, dirPath, startFileName, includeStartFile, limit, prefix)
diff --git a/weed/filer/filerstore_hardlink.go b/weed/filer/filerstore_hardlink.go
index 0fbf8310e..c6b3734b0 100644
--- a/weed/filer/filerstore_hardlink.go
+++ b/weed/filer/filerstore_hardlink.go
@@ -18,6 +18,7 @@ func (fsw *FilerStoreWrapper) handleUpdateToHardLinks(ctx context.Context, entry
 	}
 
 	// check what is existing entry
+	glog.V(4).Infof("handleUpdateToHardLinks FindEntry %s", entry.FullPath)
 	existingEntry, err := fsw.ActualStore.FindEntry(ctx, entry.FullPath)
 	if err != nil && err != filer_pb.ErrNotFound {
 		return fmt.Errorf("update existing entry %s: %v", entry.FullPath, err)
@@ -25,6 +26,7 @@ func (fsw *FilerStoreWrapper) handleUpdateToHardLinks(ctx context.Context, entry
 
 	// remove old hard link
 	if err == nil && len(existingEntry.HardLinkId) != 0 && bytes.Compare(existingEntry.HardLinkId, entry.HardLinkId) != 0 {
+		glog.V(4).Infof("handleUpdateToHardLinks DeleteHardLink %s", entry.FullPath)
 		if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 			return err
 		}
@@ -52,6 +54,7 @@ func (fsw *FilerStoreWrapper) maybeReadHardLink(ctx context.Context, entry *Entr
 	}
 	key := entry.HardLinkId
 
+	glog.V(4).Infof("maybeReadHardLink KvGet %v", key)
 	value, err := fsw.KvGet(ctx, key)
 	if err != nil {
 		glog.Errorf("read %s hardlink %d: %v", entry.FullPath, entry.HardLinkId, err)
@@ -83,6 +86,7 @@ func (fsw *FilerStoreWrapper) DeleteHardLink(ctx context.Context, hardLinkId Har
 
 	entry.HardLinkCounter--
 	if entry.HardLinkCounter <= 0 {
+		glog.V(4).Infof("DeleteHardLink KvDelete %v", key)
 		return fsw.KvDelete(ctx, key)
 	}
 
@@ -91,6 +95,7 @@ func (fsw *FilerStoreWrapper) DeleteHardLink(ctx context.Context, hardLinkId Har
 		return encodeErr
 	}
 
+	glog.V(4).Infof("DeleteHardLink KvPut %v", key)
 	return fsw.KvPut(ctx, key, newBlob)
 
 }