diff --git a/pkg/cloudcommon/db/taskman/coordinator.go b/pkg/cloudcommon/db/taskman/coordinator.go
index a4e03744ea..2bed1a559b 100644
--- a/pkg/cloudcommon/db/taskman/coordinator.go
+++ b/pkg/cloudcommon/db/taskman/coordinator.go
@@ -8,6 +8,7 @@ import (
 	"yunion.io/x/log"
 	"yunion.io/x/pkg/gotypes"
 
+	"yunion.io/x/onecloud/pkg/appsrv"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
 )
 
@@ -37,7 +38,7 @@ func init() {
 	taskTable = make(map[string]reflect.Type)
 }
 
-func RegisterTask(task interface{}) {
+func RegisterTaskAndWorker(task interface{}, workerMan *appsrv.SWorkerManager) {
 	taskName := gotypes.GetInstanceTypeName(task)
 	if _, ok := taskTable[taskName]; ok {
 		log.Fatalf("Task %s already registered!", taskName)
@@ -45,6 +46,13 @@ func RegisterTask(task interface{}) {
 	taskType := reflect.Indirect(reflect.ValueOf(task)).Type()
 	taskTable[taskName] = taskType
 	// log.Infof("Task %s registerd", taskName)
+	if workerMan != nil {
+		taskWorkerTable[taskName] = workerMan
+	}
+}
+
+func RegisterTask(task interface{}) {
+	RegisterTaskAndWorker(task, nil)
 }
 
 func isTaskExist(taskName string) bool {
diff --git a/pkg/cloudcommon/db/taskman/handler.go b/pkg/cloudcommon/db/taskman/handler.go
index 479d0234fe..37c5ebfeba 100644
--- a/pkg/cloudcommon/db/taskman/handler.go
+++ b/pkg/cloudcommon/db/taskman/handler.go
@@ -1,26 +1,12 @@
 package taskman
 
 import (
-	"yunion.io/x/jsonutils"
 	"yunion.io/x/onecloud/pkg/appsrv"
 	"yunion.io/x/onecloud/pkg/appsrv/dispatcher"
-
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
 )
 
-var taskWorkMan *appsrv.SWorkerManager
-
-func init() {
-	taskWorkMan = appsrv.NewWorkerManager("TaskWorkerManager", 4, 1024, true)
-}
-
 func AddTaskHandler(prefix string, app *appsrv.Application) {
 	handler := db.NewModelHandler(TaskManager)
 	dispatcher.AddModelDispatcher(prefix, app, handler)
 }
-
-func runTask(taskId string, data jsonutils.JSONObject) {
-	taskWorkMan.Run(func() {
-		TaskManager.execTask(taskId, data)
-	}, nil, nil)
-}
diff --git a/pkg/cloudcommon/db/taskman/tasks.go b/pkg/cloudcommon/db/taskman/tasks.go
index 26d5952e28..eaafcd9406 100644
--- a/pkg/cloudcommon/db/taskman/tasks.go
+++ b/pkg/cloudcommon/db/taskman/tasks.go
@@ -287,6 +287,14 @@ func (manager *STaskManager) fetchTask(idStr string) *STask {
 	return task
 }
 
+func (manager *STaskManager) getTaskName(taskId string) string {
+	baseTask := manager.fetchTask(taskId)
+	if baseTask == nil {
+		return ""
+	}
+	return baseTask.TaskName
+}
+
 func (manager *STaskManager) execTask(taskId string, data jsonutils.JSONObject) {
 	baseTask := manager.fetchTask(taskId)
 	if baseTask == nil {
diff --git a/pkg/cloudcommon/db/taskman/worker.go b/pkg/cloudcommon/db/taskman/worker.go
new file mode 100644
index 0000000000..7229ba2ddd
--- /dev/null
+++ b/pkg/cloudcommon/db/taskman/worker.go
@@ -0,0 +1,31 @@
+package taskman
+
+import (
+	"yunion.io/x/jsonutils"
+	"yunion.io/x/log"
+
+	"yunion.io/x/onecloud/pkg/appsrv"
+)
+
+var taskWorkMan *appsrv.SWorkerManager
+var taskWorkerTable map[string]*appsrv.SWorkerManager
+
+func init() {
+	taskWorkMan = appsrv.NewWorkerManager("TaskWorkerManager", 4, 1024, true)
+	taskWorkerTable = make(map[string]*appsrv.SWorkerManager)
+}
+
+func runTask(taskId string, data jsonutils.JSONObject) {
+	taskName := TaskManager.getTaskName(taskId)
+	if len(taskName) == 0 {
+		log.Errorf("no such task??? task_id=%s", taskId)
+		return
+	}
+	worker := taskWorkMan
+	if workerMan, ok := taskWorkerTable[taskName]; ok {
+		worker = workerMan
+	}
+	worker.Run(func() {
+		TaskManager.execTask(taskId, data)
+	}, nil, nil)
+}
diff --git a/pkg/compute/tasks/cloud_provider_sync_info_task.go b/pkg/compute/tasks/cloud_provider_sync_info_task.go
index b69e3a000a..7fcaaa986f 100644
--- a/pkg/compute/tasks/cloud_provider_sync_info_task.go
+++ b/pkg/compute/tasks/cloud_provider_sync_info_task.go
@@ -6,13 +6,15 @@ import (
 
 	"yunion.io/x/jsonutils"
 	"yunion.io/x/log"
+	"yunion.io/x/pkg/utils"
+
+	"yunion.io/x/onecloud/pkg/appsrv"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db/taskman"
 	"yunion.io/x/onecloud/pkg/cloudprovider"
 	"yunion.io/x/onecloud/pkg/compute/models"
 	"yunion.io/x/onecloud/pkg/compute/skus"
 	"yunion.io/x/onecloud/pkg/util/logclient"
-	"yunion.io/x/pkg/utils"
 )
 
 type CloudProviderSyncInfoTask struct {
@@ -20,7 +22,8 @@ type CloudProviderSyncInfoTask struct {
 }
 
 func init() {
-	taskman.RegisterTask(CloudProviderSyncInfoTask{})
+	syncWorker := appsrv.NewWorkerManager("CloudProviderSyncInfoTaskWorkerManager", 2, 512, true)
+	taskman.RegisterTaskAndWorker(CloudProviderSyncInfoTask{}, syncWorker)
 }
 
 func getAction(params *jsonutils.JSONDict) string {
diff --git a/pkg/compute/tasks/guest_start_task.go b/pkg/compute/tasks/guest_start_task.go
index f981746c35..899aec02c7 100644
--- a/pkg/compute/tasks/guest_start_task.go
+++ b/pkg/compute/tasks/guest_start_task.go
@@ -25,7 +25,7 @@ func (self *GuestStartTask) OnInit(ctx context.Context, obj db.IStandaloneModel,
 }
 
 func (self *GuestStartTask) checkTemplate(ctx context.Context, guest *models.SGuest) {
-	diskCat := guest.CategorizeDisks()
+	/*diskCat := guest.CategorizeDisks()
 	if diskCat.Root != nil && len(diskCat.Root.GetTemplateId()) > 0 {
 		if len(guest.BackupHostId) > 0 {
 			self.SetStage("OnMasterHostTemplateReady", nil)
@@ -35,7 +35,8 @@ func (self *GuestStartTask) checkTemplate(ctx context.Context, guest *models.SGu
 		guest.GetDriver().CheckDiskTemplateOnStorage(ctx, self.UserCred, diskCat.Root.GetTemplateId(), diskCat.Root.StorageId, self)
 	} else {
 		self.startStart(ctx, guest)
-	}
+	}*/
+	self.startStart(ctx, guest)
 }
 
 func (self *GuestStartTask) OnMasterHostTemplateReady(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
diff --git a/pkg/image/tasks/image_check_task.go b/pkg/image/tasks/image_check_task.go
index f39b0f5e33..c0b103a031 100644
--- a/pkg/image/tasks/image_check_task.go
+++ b/pkg/image/tasks/image_check_task.go
@@ -5,6 +5,7 @@ import (
 
 	"yunion.io/x/jsonutils"
 
+	"yunion.io/x/onecloud/pkg/appsrv"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db/taskman"
 	"yunion.io/x/onecloud/pkg/image/models"
@@ -15,7 +16,8 @@ type ImageCheckTask struct {
 }
 
 func init() {
-	taskman.RegisterTask(ImageCheckTask{})
+	checkWorker := appsrv.NewWorkerManager("ImageCheckTaskWorkerManager", 2, 1024, true)
+	taskman.RegisterTaskAndWorker(ImageCheckTask{}, checkWorker)
 }
 
 func (self *ImageCheckTask) OnInit(ctx context.Context, obj db.IStandaloneModel, data jsonutils.JSONObject) {
diff --git a/pkg/image/tasks/image_convert_task.go b/pkg/image/tasks/image_convert_task.go
index 8e95736c79..af3271a235 100644
--- a/pkg/image/tasks/image_convert_task.go
+++ b/pkg/image/tasks/image_convert_task.go
@@ -5,6 +5,7 @@ import (
 
 	"yunion.io/x/jsonutils"
 
+	"yunion.io/x/onecloud/pkg/appsrv"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db/taskman"
 	"yunion.io/x/onecloud/pkg/image/models"
@@ -15,7 +16,8 @@ type ImageConvertTask struct {
 }
 
 func init() {
-	taskman.RegisterTask(ImageConvertTask{})
+	convertWorker := appsrv.NewWorkerManager("ImageConvertTaskWorkerManager", 2, 512, true)
+	taskman.RegisterTaskAndWorker(ImageConvertTask{}, convertWorker)
 }
 
 func (self *ImageConvertTask) OnInit(ctx context.Context, obj db.IStandaloneModel, data jsonutils.JSONObject) {