Brian: Thanks for the response. I actually seen this response before and was wondering if my technique would simply work. I guess not.
I guess another question will be, if I take a snapshot every 10 mins and back it up. If I have a failure at 15th minute. Can I just simply restore my MDS to the previous snapshot and be with it? Ofcourse I will lose my 5 minutes of data, correct? TIA On Tue, Aug 5, 2008 at 12:08 PM, Brian J. Murrell <[EMAIL PROTECTED]> wrote: > On Tue, 2008-08-05 at 01:12 -0400, Mag Gam wrote: >> What is a good MGS/MDT backup strategy if there is one? >> >> I was thinking of mounting the MGS/MDT partition on the MDS as ext3 >> and rsync it every 10 mins to another server. Would this work? What >> would happen in the 9th minute I lose my MDS, would I still be able to >> have a good copy? Any thoughts or ideas? > > Peter Braam answered a similar question and of course, the answer is in > the archives. It was the second google hit on a search for "lustre mds > backup". The answer is at: > > http://lists.lustre.org/pipermail/lustre-discuss/2006-June/001655.html > > Backup of the MDT is also covered in the manual in section 15 at > > http://manual.lustre.org/manual/LustreManual16_HTML/BackupAndRestore.html#50544703_pgfId-5529 > > Now, as for mounting the MDT as ext3 (you should actually use ldiskfs, > not ext3) every 10 minutes, that means you are going to make your > filesystem unavailable every 10 minutes as you CANNOT mount the MDT > partition on more than one machine and we have not tested multiple > mounting on a single machine with any degree of confidence. > > Of course Peter's LVM snapshotting technique will allow you to mount > snapshots which you can backup as you describe. > > But if you are going to have a whole separate machine with enough > storage to mirror your MDT why not use something more active like DRBD > and have a fully functional active/passive MDT failover strategy? While > nobody in the Lustre Group has done any extensive testing of Lustre on > DRBD, there have been a number of reports of success with it here on > this list. > > b. > > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss > > _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
