RBD itself will behave fine with whenever you take the snapshot. The thing to worry about is that it's a snapshot at the block device layer, not the filesystem layer, so if you don't quiesce IO and sync to disk the filesystem might not be entirely happy with you for the same reasons that it won't be happy if you pull the power plug on it. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com On Fri, Feb 28, 2014 at 2:12 PM, Greg Poirier <greg.poirier@xxxxxxxxxx> wrote: > According to the documentation at > https://ceph.com/docs/master/rbd/rbd-snapshot/ -- snapshots require that all > I/O to a block device be stopped prior to making the snapshot. Is there any > plan to allow for online snapshotting so that we could do incremental > snapshots of running VMs on a regular basis. > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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