[Lustre-discuss] zero length files on lustre

[anthony.david at oracle.com]

On 10/09/2014 11:50 AM, Anjana Kar wrote:
> After some low level SAS expander firmware updates on our JetStor 
> shelves,
> the lustre filesystem is reporting several zero length files. The 
> raids show
> normal status, and all OSTs mount on the OSS nodes w/o problems. The
> clients also mount the filesystem. Read/write tests from the clients 
> report
> no errors, but several files which had content before are showing up zero
> length. These files appear to be on different OSTs so it's not on any 
> particular
> shelf. Rebooting the servers and a few clients hasn't shown any change.
> Servers are running CentOS 5.5, lustre 1.8.3.
>
Hi Anjana

Have you looked at this bug? It might be related.

https://projectlava.xyratex.com/show_bug.cgi?id=24458

Cheers
Anthony

> Could low level disk settings cause lustre to report zero length files?
> There have been no software changes on these systems, so not sure
> what could be causing this. Any thoughts?
>
> Thanks,
> -Anjana Kar
>  Pittsburgh Supercomputing Center
>  kar at psc.edu
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