[Lustre-discuss] strange slowdown

[Aaron Knister]

Make that 6, 5.6TB underlying luns

On Dec 13, 2007, at 11:24 AM, Aaron Knister wrote:

> Please bear with me while I try to explain this problem. It's very
> strange.
>
> I have a 33TB lustre file system with 5.6 underlying LUNs. The
> interconnect is infiniband. Any write I/O to the disk causes the mount
> to hang, and the underlying disk starts doing lots and lots of tiny
> reads for about 10 minutes. There is only one client mounted and this
> small I/O continues after killling the client. I am running lustre
> 1.6.3 with the latest rhel5 kernel on rhel5. I cannot find any
> suggestive error messages and am at a loss. It's a production
> filesystem and it's pretty much unusable.
>
> -Aaron
>
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Aaron Knister
Associate Systems Administrator/Web Designer
Center for Research on Environment and Water

(301) 595-7001
aaron at iges.org