On Thu, Dec 5, 2024 at 1:37 PM Andre Tann wrote:
> Hi all,
>
> in CephFS, creating and removing a snapshot is as easy as
>
> - mkdir .snap/SNAPSHOT_NAME
> - rmdir .snap/SNAPSHOT_NAME
>
> Both steps are completed in no time, because no data has to be moved
> around.
>
> However, what I cannot find is a way to revert to a snapshot. The only
> way I see is to
>
> rsync … .snap/SNAPSHOT_NAME/ .
>
> In this case all the data has to be moved around, with two main
> disadvantages:
>
> - takes forever
> - consumes double the space than before
>
> Is there a better way to do this?
Unfortunately, there is not. Ceph snapshots are read only and I don’t think
we will ever provide a “revert” functionality. What we would like to do is
provide the ability to clone from a snapshot into a portion of the live
filesystem (conceptually similar to an rbd clone). This is a big project
but it’s on the road map.
-Greg
>
> Cheers
> --
> Andre Tann
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