On 05/07/2015 12:10 PM, John Spray wrote: > On 06/05/2015 16:58, Scottix wrote: >> As a point to >> * someone accidentally removed a thing, and now they need a thing back >> >> I thought MooseFS has an interesting feature that I thought would be >> good for CephFS and maybe others. >> >> Basically a timed Trashbin >> "Deleted files are retained for a configurable period of time (a file >> system level "trash bin")" >> >> It's an idea to cover this use case. > > Until recently we had a bug where deleted files weren't purged until the > next MDS restart, so maybe we should just back out the fix for that :-D > > Seriously though, I didn't know about that MooseFS feature, it's > interesting that they decided to implement that. It would be fairly > straightforward to do that in CephFS (we already put deleted files into > a 'stray' directory before purging them asynchronously), but I think > there might be some debate about whether it's really the role of the > underlying filesystem to do that kind of thing. > Aren't snapshots something that should protect you against removal? IF snapshots work properly in CephFS you could create a snapshot every hour. With the recursive statistics [0] of CephFS you could "easily" backup all your data to a different Ceph system or anything not Ceph. I've done this with a ~700TB CephFS cluster and that is still working properly. Wido [0]: http://blog.widodh.nl/2015/04/playing-with-cephfs-recursive-statistics/ > John > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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