[Lustre-discuss] MDT backup procedure
Ramiro Alba Queipo
raq at cttc.upc.edu
Wed Jun 17 10:35:51 PDT 2009
HiDaniel,
By reading Chapter 15 of Lustre Operations Manual, it follows that an
MDT backup is only useful if you are changing hardwary or the like.
I am afraid that you can not pretend to replace with a previous image an
failed MDT, as data in OSTs and MDT is not matching any more, right?
Cheers
On Wed, 2009-06-17 at 09:41 -0600, Daniel Kulinski wrote:
> As we move forward with our lustre testing I am wondering about MDT
> backup.
>
>
>
> Is it feasible to unmount the MDT, create an image of it and remount
> it after the backup. Of course this wouldnât happen but nightly.
>
>
>
> From what I can identify, in the case of an MDT failure we would have
> to do the following:
>
>
>
> Restore from the last backup.
>
> Run an lfsck across the filesystem.
>
>
>
> Am I missing anything else at this point? We will also be doing file
> level backups of the filesystem as a whole but we are looking for
> quick ways to recover from an MDT failure.
>
>
>
> Thanks,
>
> Dan Kulinski
>
>
>
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--
Ramiro Alba
Centre Tecnològic de Tranferència de Calor
http://www.cttc.upc.edu
Escola Tècnica Superior d'Enginyeries
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