Keith, I think the hypervisor / infrastructure orchestration layer should be able to handle proper snapshotting with io freezing. For instance, we use CloudStack and you can set up automatic snapshots and snapshot retention policies. Cheers Andrei ----- Original Message ----- From: "Ilya Dryomov" <ilya.dryomov@xxxxxxxxxxx> To: "Keith Phua" <keith at science.nus.edu.sg> Cc: "Andrei Mikhailovsky" <andrei at arhont.com>, ceph-users at lists.ceph.com, ysg at nus.edu.sg, cheechiang at nus.edu.sg, enghee at nus.edu.sg Sent: Wednesday, 10 September, 2014 11:51:04 AM Subject: Re: Best practices on Filesystem recovery on RBD block volume? On Wed, Sep 10, 2014 at 2:45 PM, Keith Phua <keith at science.nus.edu.sg> wrote: > Hi Andrei, > > Thanks for the suggestion. > > But a rbd volume snapshots may only work if the filesystem is in a > consistent state, which mean no IO during snapshotting. With cronjob > snapshotting, usually we have no control over client doing any IOs. Having xfs_freeze -f /mnt <take a snapshot> xfs_freeze -u /mnt Thanks, Ilya -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140910/1dd9cd3d/attachment.htm>
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