On Thu, Dec 5, 2024 at 1:37 PM Andre Tann <atann@alphasrv.net> 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 _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io