[Moosefs-users] SnapShot quesiont

[<wk...@bn...>]

We've been using Moose for about 8 months now and finally got around to 
playing with snapshots.

In particular we are interested in using them on VM backups. We now 
freeze the VM, take the snapshot, unfreeze and backup the snapshot to 
the backup cluster, then depending upon tool used, re-integrate the 
snapshot back into the live copy

Since the MooseFS implementation appears to be instantaneous and could 
possibly preclude the need to 'freeze' the VM prior to taking the 
snapshot as we do with a more traditional snapshot (where it can take 
some time to complete the snapshot).

Is that the case?

Can we skip the freeze of the VM?

I suppose the freeze may still be necessary in order to force writes to 
the disk within the VM itself. But perhaps we could get away with an 
fsync and rely on on the journaling in ext3/4. Even if we continue to 
freeze the MooseFS snapshot is so much quicker.

Are there any known issues with the MooseFS SnapShots?

The developers mentioned some changes they wanted to make regarding them 
in an upcoming release.

Sincerely,

-bill