[Lustre-discuss] [HPDD-discuss] Unable to move MDS using procedure in the manual

[Dilger, Andreas]

On 2013/04/06 12:21 PM, "Colin Faber" <cfaber at gmail.com> wrote:

>You could try this
>http://xyratex.prod.acquia-sites.com/sites/default/files/Migration_WC2.1_P
>atches_1-0.tar.gz
>
>Shadow wrote this tool, it allows you to correct OI database, though it's
>not been updated in a while so I'm not sure how cleanly it will patch.

If you are going to patch 2.1.x, then there are patches in Gerrit which
backport the online LFSCK OI Scrub:
http://review.whamcloud.com/#q,message:LU-957,n,v

Upgrading to 2.4 is probably preferred, but depends on your system.

Cheers, Andreas

>On Tue, Jun 4, 2013 at 12:10 PM, Ken Hornstein
><kenh at cmf.nrl.navy.mil> wrote:
>
>>Which version of Lustre is this? File based backup / restore does not
>>work
>>in 2.x. OI scrub which rebuilds the object index is available from Lustre
>>2.3 onwards. So file based backup / restore will work from 2.3 onwards.
>
>
>Well, crud.  I guess that's what Colin was going to tell me, and I see
>Andreas said the same thing.
>
>So, this leads to a follow-up question: _where_ is latest and greatest
>Lustre manual?  I used the one labelled 2.0 here:
>
>http://wiki.lustre.org/manual/LustreManual20_HTML/LustreOperations.html
>
>Which doesn't actually mention that you can't do a file-level backup
>on the MDT.  Some poking around led me to the Whamcloud one, which
>actually
>does say that.
>
>Perhaps an upgrade to 2.4 is in order (which we were interested in doing
>anyway).

Cheers, Andreas
-- 
Andreas Dilger

Lustre Software Architect
Intel High Performance Data Division