[Lustre-discuss] LVM with Lustre

Daire Byrne Daire.Byrne at framestore-cfc.com
Thu Nov 8 03:10:29 PST 2007


Robert,

We use LVM snapshots but not on a production filesystem. It slows things down too much (kcopyd). Instead we mirror the production filesystem to the backup filesystem every night and perform snapshots on that. A modern kernel/distro (e.g. RHEL5) is required for stable snapshots. As Andreas said you can then use "tunefs.lustre --reformat --writeconf --fsname=NEWNAME" to rename the filesystems and mount them on the MDS and OSSs. Clients can then mount the snapshot filesystems.

Daire

----- "Robert LeBlanc" <robert at leblancnet.us> wrote:
> I know that Lustre is looking to use ZFS in the future, but has anyone
> used
> LVM with Lustre to perform snapshots? This would be helpful for us to
> get a
> consistent back-up of the filesystem on a daily basis.
> 
> Thanks,
> Robert
>  
> Robert LeBlanc
> College of Life Sciences Computer Support
> Brigham Young University
> leblanc at byu.edu
> (801)422-1882
> 
> 
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