On 2015-01-06 23:11, Jérôme Poulin wrote:
My only point is that there isn't anything in BTRFS to handle it accidentally being multiply mounted. Ext* for example aren't clustered, but do have an optional feature to prevent multiple mounting.On Mon, Jan 5, 2015 at 6:59 AM, Austin S Hemmelgarn <ahferroin7@xxxxxxxxx> wrote:Secondly, I would highly recommend not using ANY non-cluster-aware FS on top of a clustered block device like RBDFor my use-case, this is just a single server using the RBD device. No clustering involved on the BTRFS side of thing.
Have you tried Ceph's built in snapshot support? I don't remember how to use it, but I do know it is there (at least, it is in the most recent versions), and it is a bit more like LVM's snapshots than BTRFS is.However, it was really useful to take snapshots (just like LVM) before modifying the filesystem in any way.
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