I've not used ceph snapshots before. The documentation says that the rbd device should not be in use before creating a snapshot. Does this mean that creating a snapshot is not an atomic operation? I'm happy with a crash consistent filesystem if that's all the warning is about. If it is atomic, can you create multiple snapshots as an atomic operation? The use case for this would be a database spread across multiple volumes, eg database on one rbd, logfiles on another. Thanks James _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com