I searched online. saw Bug #538 and Tasks #584 may related to my problem. What's the status of this problem? I first used version 0.34. Then I tried a newer version which is 0.37. But the problem still exists. Is there anyone who knows this problem and how to solve this? Thanks a lot. and Happy Thanksgiving -- Xiaofei (Gregory) Du Department of Computer Science University of California, Santa Barbara -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html