Tomas Dalebjörk <tomas.dalebjork@xxxxxxxxx> writes: > hi > > I think I didn’t explain this clear enough > Allthe lvm data is present in the snapshot that I provision from our backup system > I can guarantee that! > > If I just mount that snapshot from our backup system, it works perfectly well > > so we don’t need the origin volumes in other way than copying back to it > we just need to reanimate it as a cow volume > mentioning that all data has been changed > the cow is just referencing to the origin location, so no problem there > All our data is in the cow volume, not just the changes Ok, so you have thrown out the snapshot relationship when you made your backup, and backed up both the origin and the snapshot as two separate backups? Thus your backup requires much more space than the original system did since all of the common data has now been duplicated in both backups. Now it seems you want to restore both backups, but NOT pay the storage penalty for duplicating the common parts. I don't think there is really a good way of doing that. I'd say that you can restore the origin volume, then create a snapshot of that, then run some sort of binary diff between the origin and the backup of the snapshot and write that diff to the new snapshot. _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
