[Lustre-discuss] max write speed of QDR HCA card
Atul Vidwansa
Atul.Vidwansa at Sun.COM
Wed Dec 30 22:43:44 PST 2009
Hi Lakshmana,
You can use standard ofed tools like ib_rdma_bw to check Infiniband
bandwidth between pair of nodes.
Lustre provides lnet selftest tool for measuring IB bandwidth between
pair or group of nodes. Check lustre manual for how tos.
Finally, can you post IOR parameters you are using?
Cheers,
Atul
Sent from my iPhone
On Dec 31, 2009, at 5:13 PM, lakshmana swamy <klakshman03 at hotmail.com>
wrote:
>
> Dear All,
>
> Whats the maximum write speed can be achieved with Infiniband QDR
> HCA card.
>
>
> The Question arised from my lustre setup where Iam not able to
> exceed 500MB/s (write speed) with two OSSs and one MDS
>
> Each OSS has four OSTs and one HCA card. I would like to know which
> is the bottleneck here.
>
>
> I have been using IOR for benchmarking
>
> Thank you
>
> LakshmaN
>
> New Windows 7: Simplify what you do everyday. Find the right PC for
> you.
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