[lustre-discuss] A quick question about reusing osts (lustre 2.5.3)

[Kurt Strosahl]

I was wondering because while looking at the man page for mkfs.lustre I saw the below option:

       --replace
              Used  to  initialize a target with the same --index as a previously used target if the old target was permanently lost for some reason (e.g. multiple disk failure or massive corruption).  This avoids
              having the target try to register as a new target with the MGS.

w/r,
Kurt

----- Original Message -----
From: "Ben Evans" <bevans at cray.com>
To: "Kurt Strosahl" <strosahl at jlab.org>, lustre-discuss at lists.lustre.org
Sent: Tuesday, July 21, 2015 10:17:47 AM
Subject: RE: A quick question about reusing osts (lustre 2.5.3)

I know you'd need to keep the config files, directory structures, etc.  How much of that info you need to keep around, I'm not 100% sure.

To get the MGS to accept it again, you may have to unmount and run tunefs.lustre --writeconf on all the targets.

-Ben Evans

-----Original Message-----
From: lustre-discuss [mailto:lustre-discuss-bounces at lists.lustre.org] On Behalf Of Kurt Strosahl
Sent: Tuesday, July 21, 2015 9:15 AM
To: lustre-discuss at lists.lustre.org
Subject: [lustre-discuss] A quick question about reusing osts (lustre 2.5.3)

Hello,

   I had a quick question about recreating osts... If I drain all the files off an ost can I just reformat it and have it added back into lustre, in essence reusing the same index?  The server wouldn't change.  Or would I have to preserve its configuration files?

w/r,
Kurt
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