[Lustre-discuss] Delete file entries from Metadata server

Mag Gam magawake at gmail.com
Tue Mar 24 04:36:05 PDT 2009


To do the ll_recover_lost_found_objs, can we have everything mounted
up? Or is it recommended we unmount everything?

Also what to do when we see ????? for the file attributes. Most likely
these files are gone, how can we remove them from the system all
together?

TIA



On Wed, Mar 11, 2009 at 11:59 PM, Andreas Dilger <adilger at sun.com> wrote:
> On Mar 11, 2009  19:33 +0100, Reto Gantenbein wrote:
>> We recently had a hardware defect on one of our storage arrays which
>> broke the file system on this device. After running e2fsck on the file
>> system, I was able to mount the device again as lustre file system.
>> However, a lot of data was written into the lost+found. Now we have a
>> problem, that the MDS however didn't recognize that these files are
>> not available anymore and so still lists them. But then they are not
>> accessible which results in a I/O-Error.
>
> If the objects are in lost+found on the OST then I'd suggest first
> to use the "ll_recover_lost_found_objs" on the filesystem (unmounted
> from Lustre, mounted locally as "-t ldiskfs").  This will recover a
> majority of your objects (=file data).
>
> Cheers, Andreas
> --
> Andreas Dilger
> Sr. Staff Engineer, Lustre Group
> Sun Microsystems of Canada, Inc.
>
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