diff --git a/pkg/cloudcommon/database.go b/pkg/cloudcommon/database.go
index fd2886a742..9cc03cb4f6 100644
--- a/pkg/cloudcommon/database.go
+++ b/pkg/cloudcommon/database.go
@@ -20,8 +20,8 @@ func InitDB(options *DBOptions) {
 	}
 	sqlchemy.SetDB(dbConn)
 
-	// lm := lockman.NewInMemoryLockManager()
-	lm := lockman.NewNoopLockManager()
+	lm := lockman.NewInMemoryLockManager()
+	// lm := lockman.NewNoopLockManager()
 	lockman.Init(lm)
 }
 
diff --git a/pkg/cloudcommon/db/db_dispatcher.go b/pkg/cloudcommon/db/db_dispatcher.go
index b005ae1407..b95978a483 100644
--- a/pkg/cloudcommon/db/db_dispatcher.go
+++ b/pkg/cloudcommon/db/db_dispatcher.go
@@ -1106,7 +1106,9 @@ func (dispatcher *DBModelDispatcher) Delete(ctx context.Context, idstr string, q
 		return nil, httperrors.NewGeneralError(err)
 	}
 	log.Debugf("Delete %s", model.GetShortDesc())
+
 	lockman.LockObject(ctx, model)
 	defer lockman.ReleaseObject(ctx, model)
+
 	return deleteItem(dispatcher.modelManager, model, ctx, userCred, query, data)
 }
diff --git a/pkg/cloudcommon/db/lockman/example/main.go b/pkg/cloudcommon/db/lockman/example/main.go
new file mode 100644
index 0000000000..6623ac1e5d
--- /dev/null
+++ b/pkg/cloudcommon/db/lockman/example/main.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"time"
+	"sync"
+	"context"
+
+	"yunion.io/x/log"
+	"yunion.io/x/pkg/util/stringutils"
+
+	"yunion.io/x/onecloud/pkg/cloudcommon/db/lockman"
+	"math/rand"
+)
+
+
+type FakeObject struct {
+	Id string
+}
+
+func (o *FakeObject) GetId() string {
+	return o.Id
+}
+
+func (o *FakeObject) Keyword() string {
+	return "fake"
+}
+
+func run(ctx context.Context, obj lockman.ILockedObject, id int, sleep time.Duration) {
+	log.Infof("ready to run at %d [%p]", id, ctx)
+	lockman.LockObject(ctx, obj)
+	defer lockman.ReleaseObject(ctx, obj)
+	log.Infof("Acquire obj at %d [%p]", id, ctx)
+	time.Sleep(sleep)
+	log.Infof("Release obj at %d [%p]", id, ctx)
+}
+
+func main() {
+	lockman.Init(lockman.NewInMemoryLockManager())
+	objId := stringutils.UUID4()
+	cycle := 10
+
+	var wg sync.WaitGroup
+
+	log.Infof("Start")
+
+	for id := 0; id <= 3; id += 1 {
+		wg.Add(1)
+		go func(localId int) {
+			log.Infof("Start %d", localId)
+			ctx := context.WithValue(context.Background(), "ID", localId)
+			for i := 0; i < cycle; i += 1 {
+				obj := &FakeObject{Id: objId}
+				run(ctx, obj, localId, time.Duration(rand.Intn(1000))*time.Millisecond)
+			}
+			wg.Done()
+		}(id)
+	}
+
+	wg.Wait()
+}
\ No newline at end of file
diff --git a/pkg/cloudcommon/db/lockman/fifo.go b/pkg/cloudcommon/db/lockman/fifo.go
new file mode 100644
index 0000000000..1aba01fb5f
--- /dev/null
+++ b/pkg/cloudcommon/db/lockman/fifo.go
@@ -0,0 +1,46 @@
+package lockman
+
+import (
+	"container/list"
+	"yunion.io/x/log"
+)
+
+type FIFO struct {
+	fifo *list.List
+}
+
+func NewFIFO() *FIFO {
+	return &FIFO{fifo: list.New()}
+}
+
+func (f *FIFO) Push(ele interface{}) {
+	f.fifo.PushBack(ele)
+}
+
+func (f *FIFO) Pop(ele interface{}) interface{} {
+	e := f.fifo.Front()
+	for e != nil && e.Value != ele {
+		e = e.Next()
+	}
+	if e != nil {
+		v := f.fifo.Remove(e)
+		if v != ele {
+			log.Fatalf("remove element not identical!!")
+		}
+	}
+	return nil
+}
+
+func (f *FIFO) Len() int {
+	return f.fifo.Len()
+}
+
+type ElementInspectFunc func(ele interface{})
+
+func (f *FIFO) Enum(eif ElementInspectFunc) {
+	e := f.fifo.Front()
+	for e != nil {
+		eif(e.Value)
+		e = e.Next()
+	}
+}
\ No newline at end of file
diff --git a/pkg/cloudcommon/db/lockman/fifo_test.go b/pkg/cloudcommon/db/lockman/fifo_test.go
new file mode 100644
index 0000000000..742f2723e2
--- /dev/null
+++ b/pkg/cloudcommon/db/lockman/fifo_test.go
@@ -0,0 +1,19 @@
+package lockman
+
+import "testing"
+
+func TestFIFO_Pop(t *testing.T) {
+	fifo := NewFIFO()
+	data := []int{1, 2, 3}
+	for i := 0; i < len(data); i += 1 {
+		fifo.Push(data[i])
+	}
+	t.Logf("FIFO size: %d", fifo.Len())
+	fifo.Enum(func(ele interface{}) {
+		t.Logf("FIFO ele %#v", ele)
+	})
+	for i := 0; i < len(data); i += 1 {
+		fifo.Pop(data[i])
+	}
+	t.Logf("FIFO size: %d", fifo.Len())
+}
diff --git a/pkg/cloudcommon/db/lockman/inmemory.go b/pkg/cloudcommon/db/lockman/inmemory.go
index c9cf2befc9..89ebe455f9 100644
--- a/pkg/cloudcommon/db/lockman/inmemory.go
+++ b/pkg/cloudcommon/db/lockman/inmemory.go
@@ -2,55 +2,93 @@ package lockman
 
 import (
 	"context"
-	"runtime/debug"
 	"sync"
 
 	"yunion.io/x/log"
-	"yunion.io/x/pkg/util/fifoutils"
+	"runtime/debug"
 )
 
-type SInMemoryLockOwner struct {
+const (
+	debug_log = false
+)
+
+/*type SInMemoryLockOwner struct {
 	owner context.Context
-	ready chan bool
-}
+}*/
 
 type SInMemoryLockRecord struct {
-	lock    *sync.Mutex
-	holder  context.Context
-	counter int
-	queue   *fifoutils.FIFO
+	lock   *sync.Mutex
+	cond   *sync.Cond
+	holder context.Context
+	depth  int
+	waiter *FIFO
 }
 
 func newInMemoryLockRecord(ctx context.Context) *SInMemoryLockRecord {
-	rec := SInMemoryLockRecord{lock: &sync.Mutex{}, queue: fifoutils.NewFIFO(), holder: ctx, counter: 0}
+	lock := &sync.Mutex{}
+	cond := sync.NewCond(lock)
+	rec := SInMemoryLockRecord{lock: lock, cond: cond, holder: ctx, depth: 0, waiter: NewFIFO()}
 	return &rec
 }
 
-func (rec *SInMemoryLockRecord) lockContext(ctx context.Context) *SInMemoryLockOwner {
+func (rec *SInMemoryLockRecord) lockContext(ctx context.Context) {
 	rec.lock.Lock()
 	defer rec.lock.Unlock()
 
+	if rec.holder == nil {
+		rec.holder = ctx
+		rec.depth = 1
+		return
+	}
+
+	if debug_log {
+		log.Debugf("rec.hold=[%p] ctx=[%p] %v", rec.holder, ctx, rec.holder==ctx)
+	}
+
 	if rec.holder == ctx {
-		rec.counter += 1
-		log.Infof("lockContext: same ctx, counter: %d [%p]", rec.counter, rec.holder)
-		if rec.counter > 32 {
-			// MUST BE BUG
+		rec.depth += 1
+		if debug_log {
+			log.Infof("lockContext: same ctx, depth: %d [%p]", rec.depth, rec.holder)
+		}
+		if rec.depth > 32 {
+			// XXX MUST BE BUG ???
 			debug.PrintStack()
 			panic("Too many recursive locks!!!")
 		}
-		return nil
+		return
 	}
-	// check
-	for i := 0; i < rec.queue.Len(); i += 1 {
-		ele := rec.queue.ElementAt(i).(*SInMemoryLockOwner)
-		if ele.owner == ctx {
-			log.Fatalf("try to lock from a wait context????")
-		}
-	}
-	owner := SInMemoryLockOwner{owner: ctx, ready: make(chan bool)}
-	rec.queue.Push(&owner)
 
-	return &owner
+	// check
+	rec.waiter.Enum(func(ele interface{}) {
+		electx := ele.(context.Context)
+		if electx == ctx {
+			log.Fatalf("try to lock from a waiter context????")
+		}
+	})
+
+	rec.waiter.Push(ctx)
+
+	if debug_log {
+		log.Debugf("waiter size %d after push", rec.waiter.Len())
+		log.Debugf("Start to wait ... [%p]", ctx)
+	}
+
+	for rec.holder != nil {
+		rec.cond.Wait()
+	}
+
+	if debug_log {
+		log.Debugf("End of wait ... [%p]", ctx)
+	}
+
+	rec.waiter.Pop(ctx)
+
+	if debug_log {
+		log.Debugf("waiter size %d after pop", rec.waiter.Len())
+	}
+
+	rec.holder = ctx
+	rec.depth = 1
 }
 
 func (rec *SInMemoryLockRecord) unlockContext(ctx context.Context) (needClean bool) {
@@ -61,31 +99,27 @@ func (rec *SInMemoryLockRecord) unlockContext(ctx context.Context) (needClean bo
 		log.Fatalf("try to unlock a wait context???")
 	}
 
-	rec.counter -= 1
+	if debug_log {
+		log.Debugf("unlockContext depth %d [%p]", rec.depth, ctx)
+	}
 
-	if rec.counter <= 0 {
-		if rec.queue.Len() == 0 {
+	rec.depth -= 1
+
+	if rec.depth <= 0 {
+		if debug_log {
+			log.Debugf("depth 0, to release lock for context [%p]", ctx)
+		}
+
+		rec.holder = nil
+		if rec.waiter.Len() == 0 {
 			return true
 		}
-		newHolder := rec.queue.Pop().(*SInMemoryLockOwner)
-		rec.holder = newHolder.owner
-		rec.counter = 1
-		newHolder.notify()
+		rec.cond.Signal()
 	}
 
 	return false
 }
 
-func (owner *SInMemoryLockOwner) wait() {
-	// log.Infof("wait for notify %p", owner.owner)
-	<-owner.ready
-}
-
-func (owner *SInMemoryLockOwner) notify() {
-	// log.Infof("notify %p", owner.owner)
-	owner.ready <- true
-}
-
 type SInMemoryLockManager struct {
 	tableLock *sync.Mutex
 	lockTable map[string]*SInMemoryLockRecord
@@ -117,10 +151,7 @@ func (lockman *SInMemoryLockManager) getRecord(ctx context.Context, key string,
 func (lockman *SInMemoryLockManager) LockKey(ctx context.Context, key string) {
 	record := lockman.getRecordWithLock(ctx, key)
 
-	owner := record.lockContext(ctx)
-	if owner != nil {
-		owner.wait()
-	}
+	record.lockContext(ctx)
 }
 
 func (lockman *SInMemoryLockManager) UnlockKey(ctx context.Context, key string) {
@@ -137,4 +168,4 @@ func (lockman *SInMemoryLockManager) UnlockKey(ctx context.Context, key string)
 	if needClean {
 		delete(lockman.lockTable, key)
 	}
-}
+}
\ No newline at end of file
diff --git a/pkg/cloudcommon/db/lockman/inmemory_test.go b/pkg/cloudcommon/db/lockman/inmemory_test.go
index 27ee308556..ad7b89866a 100644
--- a/pkg/cloudcommon/db/lockman/inmemory_test.go
+++ b/pkg/cloudcommon/db/lockman/inmemory_test.go
@@ -24,10 +24,10 @@ func (o *FakeObject) Keyword() string {
 func run(t *testing.T, ctx context.Context, obj ILockedObject, id int, sleep time.Duration) {
 	t.Logf("ready to run at %d [%p]", id, ctx)
 	LockObject(ctx, obj)
-	defer LockObject(ctx, obj)
-	t.Logf("Acquire obj at %s [%p]", id, ctx)
+	defer ReleaseObject(ctx, obj)
+	t.Logf("Acquire obj at %d [%p]", id, ctx)
 	time.Sleep(sleep)
-	t.Logf("Release obj at %s [%p]", id, ctx)
+	t.Logf("Release obj at %d [%p]", id, ctx)
 }
 
 func TestInMemoryLockManager(t *testing.T) {
diff --git a/pkg/cloudcommon/db/virtualresource.go b/pkg/cloudcommon/db/virtualresource.go
index 4b90d64b2a..7270321b4b 100644
--- a/pkg/cloudcommon/db/virtualresource.go
+++ b/pkg/cloudcommon/db/virtualresource.go
@@ -282,8 +282,10 @@ func (model *SVirtualResourceBase) VirtualModelManager() IVirtualModelManager {
 
 func (model *SVirtualResourceBase) CancelPendingDelete(ctx context.Context, userCred mcclient.TokenCredential) error {
 	ownerProjId := model.GetOwnerProjectId()
+
 	lockman.LockClass(ctx, model.GetModelManager(), ownerProjId)
 	defer lockman.ReleaseClass(ctx, model.GetModelManager(), ownerProjId)
+
 	_, err := model.GetModelManager().TableSpec().Update(model, func() error {
 		model.Name = GenerateName(model.GetModelManager(), ownerProjId, model.Name)
 		model.PendingDeleted = false
diff --git a/pkg/compute/hostdrivers/aliyun.go b/pkg/compute/hostdrivers/aliyun.go
index 421e3d1b87..2a7ad29a72 100644
--- a/pkg/compute/hostdrivers/aliyun.go
+++ b/pkg/compute/hostdrivers/aliyun.go
@@ -10,6 +10,7 @@ import (
 	"yunion.io/x/onecloud/pkg/cloudprovider"
 	"yunion.io/x/onecloud/pkg/compute/models"
 	"yunion.io/x/onecloud/pkg/httperrors"
+	"yunion.io/x/onecloud/pkg/cloudcommon/db/lockman"
 )
 
 type SAliyunHostDriver struct {
@@ -25,7 +26,7 @@ func (self *SAliyunHostDriver) GetHostType() string {
 	return models.HOST_TYPE_ALIYUN
 }
 
-func (self *SAliyunHostDriver) CheckAndSetCacheImage(ctx context.Context, host *models.SHost, storageCache *models.SStoragecache, scimg *models.SStoragecachedimage, task taskman.ITask) error {
+func (self *SAliyunHostDriver) CheckAndSetCacheImage(ctx context.Context, host *models.SHost, storageCache *models.SStoragecache, task taskman.ITask) error {
 	params := task.GetParams()
 	imageId, err := params.GetString("image_id")
 	if err != nil {
@@ -36,9 +37,16 @@ func (self *SAliyunHostDriver) CheckAndSetCacheImage(ctx context.Context, host *
 	osType, _ := params.GetString("os_type")
 	osDist, _ := params.GetString("os_distribution")
 
+
 	isForce := jsonutils.QueryBoolean(params, "is_force", false)
 	userCred := task.GetUserCred()
 	taskman.LocalTaskRun(task, func() (jsonutils.JSONObject, error) {
+
+		lockman.LockRawObject(ctx, "cachedimages", fmt.Sprintf("%s-%s", storageCache.Id, imageId))
+		defer lockman.ReleaseRawObject(ctx, "cachedimages", fmt.Sprintf("%s-%s", storageCache.Id, imageId))
+
+		scimg := models.StoragecachedimageManager.Register(ctx, task.GetUserCred(), storageCache.Id, imageId)
+
 		iStorageCache, err := storageCache.GetIStorageCache()
 		if err != nil {
 			return nil, err
@@ -49,6 +57,8 @@ func (self *SAliyunHostDriver) CheckAndSetCacheImage(ctx context.Context, host *
 		if err != nil {
 			return nil, err
 		} else {
+			scimg.SetExternalId(extImgId)
+
 			ret := jsonutils.NewDict()
 			ret.Add(jsonutils.NewString(extImgId), "image_id")
 			return ret, nil
diff --git a/pkg/compute/hostdrivers/hostdrivers.go b/pkg/compute/hostdrivers/hostdrivers.go
deleted file mode 100644
index a58d95a88b..0000000000
--- a/pkg/compute/hostdrivers/hostdrivers.go
+++ /dev/null
@@ -1 +0,0 @@
-package hostdrivers
diff --git a/pkg/compute/hostdrivers/kvm.go b/pkg/compute/hostdrivers/kvm.go
index db6d253a3c..b317f44a49 100644
--- a/pkg/compute/hostdrivers/kvm.go
+++ b/pkg/compute/hostdrivers/kvm.go
@@ -25,7 +25,7 @@ func (self *SKVMHostDriver) GetHostType() string {
 	return models.HOST_TYPE_HYPERVISOR
 }
 
-func (self *SKVMHostDriver) CheckAndSetCacheImage(ctx context.Context, host *models.SHost, storageCache *models.SStoragecache, scimg *models.SStoragecachedimage, task taskman.ITask) error {
+func (self *SKVMHostDriver) CheckAndSetCacheImage(ctx context.Context, host *models.SHost, storageCache *models.SStoragecache, task taskman.ITask) error {
 	params := task.GetParams()
 	imageId, err := params.GetString("image_id")
 	if err != nil {
diff --git a/pkg/compute/models/elasticips.go b/pkg/compute/models/elasticips.go
index 61fd224233..02d10139eb 100644
--- a/pkg/compute/models/elasticips.go
+++ b/pkg/compute/models/elasticips.go
@@ -19,6 +19,7 @@ import (
 	"yunion.io/x/onecloud/pkg/cloudprovider"
 	"yunion.io/x/onecloud/pkg/httperrors"
 	"yunion.io/x/onecloud/pkg/mcclient"
+	"yunion.io/x/onecloud/pkg/cloudcommon/db/lockman"
 )
 
 const (
@@ -485,6 +486,9 @@ func (self *SElasticip) PerformAssociate(ctx context.Context, userCred mcclient.
 
 	server := vmObj.(*SGuest)
 
+	lockman.LockObject(ctx, server)
+	defer lockman.ReleaseObject(ctx, server)
+
 	if server.PendingDeleted {
 		return nil, httperrors.NewInvalidStatusError("cannot associate pending delete server")
 	}
diff --git a/pkg/compute/models/guests.go b/pkg/compute/models/guests.go
index 3f8f39d68e..233b006292 100644
--- a/pkg/compute/models/guests.go
+++ b/pkg/compute/models/guests.go
@@ -1637,8 +1637,10 @@ func (self *SGuest) PerformSaveImage(ctx context.Context, userCred mcclient.Toke
 		properties.Add(jsonutils.NewString(self.OsType), "os_type")
 		kwargs.Add(properties, "properties")
 		kwargs.Add(jsonutils.NewBool(restart), "restart")
+
 		lockman.LockObject(ctx, disks.Root)
 		defer lockman.ReleaseObject(ctx, disks.Root)
+
 		if imageId, err := disks.Root.PrepareSaveImage(ctx, userCred, kwargs); err != nil {
 			return nil, err
 		} else {
@@ -2031,7 +2033,7 @@ func (self *SGuest) CreateDisksOnHost(ctx context.Context, userCred mcclient.Tok
 
 func (self *SGuest) createDiskOnStorage(ctx context.Context, userCred mcclient.TokenCredential, storage *SStorage, diskConfig *SDiskConfig, pendingUsage quotas.IQuota) (*SDisk, error) {
 	lockman.LockObject(ctx, storage)
-	defer lockman.LockObject(ctx, storage)
+	defer lockman.ReleaseObject(ctx, storage)
 
 	lockman.LockClass(ctx, QuotaManager, self.ProjectId)
 	defer lockman.ReleaseClass(ctx, QuotaManager, self.ProjectId)
diff --git a/pkg/compute/models/hostdrivers.go b/pkg/compute/models/hostdrivers.go
index 3bec75d3b4..7a46ba820d 100644
--- a/pkg/compute/models/hostdrivers.go
+++ b/pkg/compute/models/hostdrivers.go
@@ -11,7 +11,7 @@ import (
 
 type IHostDriver interface {
 	GetHostType() string
-	CheckAndSetCacheImage(ctx context.Context, host *SHost, storagecache *SStoragecache, scimg *SStoragecachedimage, task taskman.ITask) error
+	CheckAndSetCacheImage(ctx context.Context, host *SHost, storagecache *SStoragecache, task taskman.ITask) error
 	RequestPrepareSaveDiskOnHost(ctx context.Context, host *SHost, disk *SDisk, imageId string, task taskman.ITask) error
 	RequestSaveUploadImageOnHost(ctx context.Context, host *SHost, disk *SDisk, imageId string, task taskman.ITask, data jsonutils.JSONObject) error
 	RequestAllocateDiskOnStorage(ctx context.Context, host *SHost, storage *SStorage, disk *SDisk, task taskman.ITask, content *jsonutils.JSONDict) error
diff --git a/pkg/compute/models/secgroups.go b/pkg/compute/models/secgroups.go
index a572574bb9..9f2efa7bd4 100644
--- a/pkg/compute/models/secgroups.go
+++ b/pkg/compute/models/secgroups.go
@@ -270,8 +270,10 @@ func (manager *SSecurityGroupManager) DelaySync(ctx context.Context, userCred mc
 		log.Errorf("DelaySync secgroup failed")
 	} else {
 		needSync := false
+
 		lockman.LockObject(ctx, secgrp)
 		defer lockman.ReleaseObject(ctx, secgrp)
+
 		if secgrp.IsDirty {
 			if _, err := secgrp.GetModelManager().TableSpec().Update(secgrp, func() error {
 				secgrp.IsDirty = false
diff --git a/pkg/compute/tasks/guest_batch_create_task.go b/pkg/compute/tasks/guest_batch_create_task.go
index b3a6c10dba..65758a2313 100644
--- a/pkg/compute/tasks/guest_batch_create_task.go
+++ b/pkg/compute/tasks/guest_batch_create_task.go
@@ -73,6 +73,7 @@ func (self *GuestBatchCreateTask) onSchedulerRequestFail(ctx context.Context, gu
 func (self *GuestBatchCreateTask) onScheduleFail(ctx context.Context, guest *models.SGuest, msg string) {
 	lockman.LockObject(ctx, guest)
 	defer lockman.ReleaseObject(ctx, guest)
+
 	reason := "No matching resources"
 	if len(msg) > 0 {
 		reason = fmt.Sprintf("%s: %s", reason, msg)
diff --git a/pkg/compute/tasks/guest_change_config_task.go b/pkg/compute/tasks/guest_change_config_task.go
index 78963011d8..84b112e43c 100644
--- a/pkg/compute/tasks/guest_change_config_task.go
+++ b/pkg/compute/tasks/guest_change_config_task.go
@@ -181,8 +181,10 @@ func (self *GuestChangeConfigTask) OnCreateDisksComplete(ctx context.Context, ob
 		if addMem > 0 {
 			cancelUsage.Memory = addMem
 		}
+
 		lockman.LockClass(ctx, guest.GetModelManager(), guest.ProjectId)
 		defer lockman.ReleaseClass(ctx, guest.GetModelManager(), guest.ProjectId)
+
 		err = models.QuotaManager.CancelPendingUsage(ctx, self.UserCred, guest.ProjectId, &pendingUsage, &cancelUsage)
 		if err != nil {
 			self.SetStageFailed(ctx, err.Error())
diff --git a/pkg/compute/tasks/storage_cache_image_task.go b/pkg/compute/tasks/storage_cache_image_task.go
index fc24e13ea0..bd3d476fab 100644
--- a/pkg/compute/tasks/storage_cache_image_task.go
+++ b/pkg/compute/tasks/storage_cache_image_task.go
@@ -34,7 +34,7 @@ func (self *StorageCacheImageTask) OnInit(ctx context.Context, obj db.IStandalon
 	self.SetStage("on_image_cache_complete", nil)
 
 	host, _ := storageCache.GetHost()
-	err := host.GetHostDriver().CheckAndSetCacheImage(ctx, host, storageCache, scimg, self)
+	err := host.GetHostDriver().CheckAndSetCacheImage(ctx, host, storageCache, self)
 	if err != nil {
 		errData := taskman.Error2TaskData(err)
 		self.OnImageCacheCompleteFailed(ctx, storageCache, errData)
@@ -46,8 +46,8 @@ func (self *StorageCacheImageTask) OnImageCacheComplete(ctx context.Context, obj
 	storageCache := obj.(*models.SStoragecache)
 	imageId, _ := self.Params.GetString("image_id")
 	scimg := models.StoragecachedimageManager.Register(ctx, self.UserCred, storageCache.Id, imageId)
-	extImgId, _ := data.GetString("image_id")
-	self.OnCacheSucc(ctx, storageCache, imageId, scimg, extImgId)
+	// extImgId, _ := data.GetString("image_id")
+	self.OnCacheSucc(ctx, storageCache, imageId, scimg)
 }
 
 func (self *StorageCacheImageTask) OnImageCacheCompleteFailed(ctx context.Context, obj db.IStandaloneModel, data jsonutils.JSONObject) {
@@ -70,11 +70,8 @@ func (self *StorageCacheImageTask) OnCacheFailed(ctx context.Context, cache *mod
 	self.SetStageFailed(ctx, err.Error())
 }
 
-func (self *StorageCacheImageTask) OnCacheSucc(ctx context.Context, cache *models.SStoragecache, imageId string, scimg *models.SStoragecachedimage, extImgId string) {
+func (self *StorageCacheImageTask) OnCacheSucc(ctx context.Context, cache *models.SStoragecache, imageId string, scimg *models.SStoragecachedimage) {
 	scimg.SetStatus(self.UserCred, models.CACHED_IMAGE_STATUS_READY, "cached")
-	if len(cache.ExternalId) > 0 && len(extImgId) > 0 && scimg.ExternalId != extImgId {
-		scimg.SetExternalId(extImgId)
-	}
 	models.CachedimageManager.ImageAddRefCount(imageId)
 	db.OpsLog.LogEvent(cache, db.ACT_CACHED_IMAGE, imageId, self.UserCred)
 	self.SetStageComplete(ctx, nil)
diff --git a/pkg/util/aliyun/storagecache.go b/pkg/util/aliyun/storagecache.go
index 666b46574f..d945c8d054 100644
--- a/pkg/util/aliyun/storagecache.go
+++ b/pkg/util/aliyun/storagecache.go
@@ -5,7 +5,6 @@ import (
 	"os"
 	"strings"
 	"time"
-
 	"github.com/aliyun/aliyun-oss-go-sdk/oss"
 	"yunion.io/x/jsonutils"
 	"yunion.io/x/log"
@@ -87,12 +86,14 @@ func (self *SStoragecache) GetIImages() ([]cloudprovider.ICloudImage, error) {
 }
 
 func (self *SStoragecache) UploadImage(userCred mcclient.TokenCredential, imageId string, osArch, osType, osDist string, extId string, isForce bool) (string, error) {
+
 	if len(extId) > 0 {
 		status, _ := self.region.GetImageStatus(extId)
 		if status == ImageStatusAvailable && !isForce {
 			return extId, nil
 		}
 	}
+
 	return self.uploadImage(userCred, imageId, osArch, osType, osDist, isForce)
 }