[Lustre-discuss] large ost and fsck
Kossey, Robert
bob.kossey at hp.com
Tue Oct 28 08:01:20 PDT 2008
The original case raw size was 9.001TB(9,001,000,000,000 bytes), but the
(ext3?) formatted size reported by lustre_config was 8584023MB, which is
less than 8TiB. However, we have tried another case with a raw size of
11.0 TB, for which the formatted size is well above 8TiB:
root> lfs df -h
UUID bytes Used Available Use% Mounted on
testfs-MDT0000_UUID 717.7G 472.6M 676.2G 0% /testfs[MDT:0]
testfs-OST0000_UUID 9.8T 436.5M 9.3T 0% /testfs[OST:0]
filesystem summary: 9.8T 436.5M 9.3T 0% /testfs
So is it the case that > 8TiB is possible to create without errors, but
remains unsupported?
Bob
> >/ Using RHEL5U1, we have created an OST on a 9.001 TB
> /
> TiB or TB? Respectively those amount to
>
> 9,896,704,161,611.776 and 9,001,000,000,000 bytes.
>
> When those are converted to TiB they are are:
>
> 9.001 and 8.18636 TiB (respectively) which are both more than 8TiB.
>
> >/ Is this
> />/ OST OK to use, or would we have receive an error message
> if it was not OK?
> /
> I'm not sure what the consequences of using an OST > 8TiB are to be
> honest.
>
> b.
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