[Lustre-discuss] How to rebuild mdt

[Colin Faber]

Hi,

When you performed your backup / restore process of your MDT did you 
follow the manual?

Also did you verify that your backup process successfully backed up the 
EA information on the files?

-cf


On 09/13/2011 02:05 PM, Antonio Concas wrote:
> Hi,
>
> i've a big problem,
> please help me,
>
> I've a lustre filesystem of about 300 TByte,
> lustre version 1.8.4
> currently i'm using 6 host,
> the first one mount 1 lun for mgs, 1 lun for mdt and 6 lun for ost
> the other 5 hosts mounts only ost
> mgs lun and mdt lun are about 500 GB
> every ost has the journal in another lun,
>
> last week mdt goes full of inodes, 100% used
> so, we create another lun with about 900 GB of space,
> the lun was formatted with command mkfs.lustre
> and we use the rsync  command with -Xav option to sync the old
> and the new mdt,
>
> after that we mount the filesystem with new mdt, and if we do
> the lfs df -i command we can se the right number of inodes and
> the right space used, but all the files now has 0 byte and if
> i do "vi" every file is empty.
>
> the old mdt lun is corrupted an the e2fsck has erased many iondes,
> so i cannot use that lun.
>
> Is there a way to rebuild mdt catalog from ost or so?
> please help me!!!
>
> Antonio
>
>
>
>
>
>
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