On Wed, Jun 7, 2017 at 11:46 PM, McFarland, Bruce <Bruce.McFarland@xxxxxxxxxxxx> wrote: > I have a couple of CephFS snapshot questions > > - Is there any functionality similar to rbd clone/flatten such that > the snapshot can be made writable? Or is that as simple as copying the > .snap/<dirname> to another cluster? No, there's no cloning. You don't need another cluster though -- you can "cp -r" your snapshot anywhere on any filesystem, and you'll end up with fresh files that you can write to. > > - If the first object write since the snapid was created is a user > error how is that object recovered if it isn’t added to the snapid until > it’s 1st write after snapid creation? Don't understand the question at all. "user error"? > - If I want to clone the .snap/<dirname>/ and not all objects have > been written since .snap/<dirname>/ was created how do I know if or get all > objects into the snap if I wanted to move the snap to another cluster? There's no concept of moving a snapshot between clusters. If you're just talking about doing a "cp -r" of the snapshot, then the MDS should do the right thing in terms of blocking your reads on files that have dirty data in client caches -- when we make a snapshot then clients doing buffered writes are asked to flush those buffers. John > > > I might not be making complete sense yet and am in the process of testing to > see how CephFS snapshots behave. > > > > > _______________________________________________ > 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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