Re: Supermicro X8DTH-6: Only ~250MiB/s from RAID<->RAID over 10GbE?

Dr. David Alan Gilbert
2011-02-05T22:06:25Z

* Justin Piszcz (jpiszcz@lucidpixels.com) wrote:
>
>
> On Sat, 5 Feb 2011, Emmanuel Florac wrote:
>
>> Le Sat, 5 Feb 2011 14:35:52 -0500 (EST) vous écriviez:
>>
>
> To respond to everyone:
>
>> Did you try launching 4 simultaneous cp operations over nfs to get to
>> 1.2 GB/s?
>> I've witnessed single stream copy performance with Samba being less than
>> maximum due to Samba limitations. Running multiple copy ops in parallel then
>> usually saturates the pipe.
>
>
> I tried 4 simultaenous cp's and there was little change, 250-320MiB/s.

So I think you've said network benchmarks are OK, disc benchmarks are OK, but
a copy over the network is slow.

What happens if you run a disc benchmark at the same time as a network benchmark;
even though the two aren't related? Can you keep the disc busy writing even when
the network is being pushed?

Dave
--
-----Open up your eyes, open up your mind, open up your code -------
/ Dr. David Alan Gilbert | Running GNU/Linux | Happy \
\ gro.gilbert @ treblig.org | | In Hex /
\ _________________________|_____ http://www.treblig.org |_______/
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html