diff --git a/cmd/registry/config-dev.yml b/cmd/registry/config-dev.yml
index 24c81c2ca00..8193493920a 100644
--- a/cmd/registry/config-dev.yml
+++ b/cmd/registry/config-dev.yml
@@ -13,10 +13,10 @@ storage:
       accesskey: testy
       secretkey: testy
       region: us-west-1
-      regionendpoint: http://10.9.8.73:80
+      regionendpoint: http://10.9.8.95:80
       # forcepathstyle: true
       # accelerate: false
-      bucket: test2
+      bucket: test
       # encrypt: true
       # chunksize: 5242880
       multipartcopychunksize: 33554432
diff --git a/registry/handlers/manifests.go b/registry/handlers/manifests.go
index abd2986d1d2..6c75386fedb 100644
--- a/registry/handlers/manifests.go
+++ b/registry/handlers/manifests.go
@@ -6,6 +6,7 @@ import (
 	"mime"
 	"net/http"
 	"strings"
+	"time"
 
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/internal/dcontext"
@@ -123,7 +124,7 @@ func (imh *manifestHandler) GetManifest(w http.ResponseWriter, r *http.Request)
 			}
 			return
 		}
-		imh.Digest = desc.Digest
+		imh.Digest = desc.Digest // 设置 digst
 	}
 
 	if etagMatch(r, imh.Digest.String()) {
@@ -455,7 +456,9 @@ func (imh *manifestHandler) DeleteManifest(w http.ResponseWriter, r *http.Reques
 		return
 	}
 
-	err = manifests.Delete(imh, imh.Digest)
+	now := time.Now()
+	err = manifests.Delete(imh, imh.Digest) // 删除 <root>/v2/repositories/<name>/_manifests/revisions/<algorithm>/<hex digest>/link
+	dcontext.GetLogger(imh).Infof("DeleteImageTag with digest %s with time: %s", imh.Digest, time.Since(now))
 	if err != nil {
 		switch err {
 		case digest.ErrDigestUnsupported:
@@ -475,18 +478,22 @@ func (imh *manifestHandler) DeleteManifest(w http.ResponseWriter, r *http.Reques
 	}
 
 	tagService := imh.Repository.Tags(imh)
+	now = time.Now()
 	referencedTags, err := tagService.Lookup(imh, distribution.Descriptor{Digest: imh.Digest})
+	dcontext.GetLogger(imh).Infof("DeleteImageTag with lookup digest %s with time: %s", imh.Digest, time.Since(now))
 	if err != nil {
 		imh.Errors = append(imh.Errors, err)
 		return
 	}
 
+	now = time.Now()
 	for _, tag := range referencedTags {
 		if err := tagService.Untag(imh, tag); err != nil {
 			imh.Errors = append(imh.Errors, err)
 			return
 		}
 	}
+	dcontext.GetLogger(imh).Infof("DeleteImageTag with untag digest %s with time: %s", imh.Digest, time.Since(now))
 
 	w.WriteHeader(http.StatusAccepted)
 }
diff --git a/registry/storage/linkedblobstore.go b/registry/storage/linkedblobstore.go
index 2920b9bfef8..2c75f768dd9 100644
--- a/registry/storage/linkedblobstore.go
+++ b/registry/storage/linkedblobstore.go
@@ -366,7 +366,7 @@ type linkedBlobStatter struct {
 var _ distribution.BlobDescriptorService = &linkedBlobStatter{}
 
 func (lbs *linkedBlobStatter) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
-	blobLinkPath, err := lbs.linkPath(lbs.repository.Named().Name(), dgst)
+	blobLinkPath, err := lbs.linkPath(lbs.repository.Named().Name(), dgst) // <root>/v2/repositories/<name>/_manifests/revisions/<algorithm>/<hex digest>/link
 	if err != nil {
 		return distribution.Descriptor{}, err
 	}
diff --git a/registry/storage/tagstore.go b/registry/storage/tagstore.go
index 60845bc1908..d0db8cd75d8 100644
--- a/registry/storage/tagstore.go
+++ b/registry/storage/tagstore.go
@@ -24,14 +24,14 @@ type tagStore struct {
 
 // All returns all tags
 func (ts *tagStore) All(ctx context.Context) ([]string, error) {
-	pathSpec, err := pathFor(manifestTagsPathSpec{
+	pathSpec, err := pathFor(manifestTagsPathSpec{ // <root>/v2/repositories/<name>/_manifests/tags/
 		name: ts.repository.Named().Name(),
 	})
 	if err != nil {
 		return nil, err
 	}
 
-	entries, err := ts.blobStore.driver.List(ctx, pathSpec)
+	entries, err := ts.blobStore.driver.List(ctx, pathSpec) // 以 s3 为例，列出 <root>/v2/repositories/<name>/_manifests/tags/ 目录下的所有 entries
 	if err != nil {
 		switch err := err.(type) {
 		case storagedriver.PathNotFoundError:
@@ -78,7 +78,7 @@ func (ts *tagStore) Tag(ctx context.Context, tag string, desc distribution.Descr
 
 // resolve the current revision for name and tag.
 func (ts *tagStore) Get(ctx context.Context, tag string) (distribution.Descriptor, error) {
-	currentPath, err := pathFor(manifestTagCurrentPathSpec{
+	currentPath, err := pathFor(manifestTagCurrentPathSpec{ // <root>/v2/repositories/<name>/_manifests/tags/<tag>/current/link
 		name: ts.repository.Named().Name(),
 		tag:  tag,
 	})
@@ -86,7 +86,7 @@ func (ts *tagStore) Get(ctx context.Context, tag string) (distribution.Descripto
 		return distribution.Descriptor{}, err
 	}
 
-	revision, err := ts.blobStore.readlink(ctx, currentPath)
+	revision, err := ts.blobStore.readlink(ctx, currentPath) // 从 link 文件或对象中读取对应的 revision
 	if err != nil {
 		switch err.(type) {
 		case storagedriver.PathNotFoundError:
@@ -101,7 +101,7 @@ func (ts *tagStore) Get(ctx context.Context, tag string) (distribution.Descripto
 
 // Untag removes the tag association
 func (ts *tagStore) Untag(ctx context.Context, tag string) error {
-	tagPath, err := pathFor(manifestTagPathSpec{
+	tagPath, err := pathFor(manifestTagPathSpec{ // <root>/v2/repositories/<name>/_manifests/tags/<tag>/
 		name: ts.repository.Named().Name(),
 		tag:  tag,
 	})
@@ -152,7 +152,7 @@ func (ts *tagStore) Lookup(ctx context.Context, desc distribution.Descriptor) ([
 			tag:  tag,
 		}
 
-		tagLinkPath, _ := pathFor(tagLinkPathSpec)
+		tagLinkPath, _ := pathFor(tagLinkPathSpec) // <root>/v2/repositories/<name>/_manifests/tags/<tag>/current/link
 		tagDigest, err := ts.blobStore.readlink(ctx, tagLinkPath)
 		if err != nil {
 			switch err.(type) {