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" <[email protected]> To: "Keith Phua" <[email protected]> Cc: "Andrei Mikhailovsky" <[email protected]>, [email protected], [email protected], [email protected], [email protected] Sent: Wednesday, 10 September, 2014 11:51:04 AM Subject: Re: [ceph-users] Best practices on Filesystem recovery on RBD block volume? On Wed, Sep 10, 2014 at 2:45 PM, Keith Phua <[email protected]> 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
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