Thanks for ressponse! Yes, it is in use "watcher=10.1.254.51:0/1544956346 client.39553300 cookie=140244238214096" this is indicating the client is connect the image. I am using fio perform write task on it. I guess it is the feature not enable correctly or setting somewhere incorrect. Should I restart any process after modifying Ceph config? Any thought? _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx