On Mon, Nov 29, 2004 at 03:08:50PM -0000, C R Ritson wrote: >Does anybody know how much overhead is involved in keeping a snapshot of >an active volume (for 24 hours)? I am currently running LVM1 (waiting >for snapshots in LVM2/device mapper) and am making a snapshot of my user >volumes overnight. These are left available for 24 hours in the hope >that users who damage a file will be able to get "yesterday's copy" from >the snapshot without us needing to restore from tape. There is obviously >some overhead involved, but does anyone know how much? It can be quite significant, depending on your workload. I'm using snapshots in a similar way, and I saw performance drop by a factor of 2 (or more) on our main NFS server. It's very useful to have the snapshot, so we live with it. -- Steve McIntyre, Plasmon smcintyre@software.plasmon.com "C++ ate my sanity" -- Jon Rabone _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
