Also, what is the best way to test the backup? Other than really remove my MGS and restore it. Is there a better way to test this?
TIA On Tue, Aug 5, 2008 at 6:37 PM, Mag Gam <[EMAIL PROTECTED]> wrote: > 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
