Re: [Scst-devel] Integration of SCST in the mainstream Linux kernel

Vladislav Bolkhovitin
2008-02-01T12:01:19Z

Bart Van Assche wrote:
> On Jan 31, 2008 5:25 PM, Joe Landman <landman@scalableinformatics.com> wrote:
>
>>Vladislav Bolkhovitin wrote:
>>
>>>Actually, I don't know what kind of conclusions it is possible to make
>>>from disktest's results (maybe only how throughput gets bigger or slower
>>>with increasing number of threads?), it's a good stress test tool, but
>>>not more.
>>
>>Unfortunately, I agree. Bonnie++, dd tests, and a few others seem to
>>bear far closer to "real world" tests than disktest and iozone, the
>>latter of which does more to test the speed of RAM cache and system call
>>performance than actual IO.
>
>
> I have ran some tests with Bonnie++, but found out that on a fast
> network like IB the filesystem used for the test has a really big
> impact on the test results.
>
> If anyone has a suggestion for a better test than dd to compare the
> performance of SCSI storage protocols, please let it know.

I would suggest you to try something from real life, like:

- Copying large file tree over a single or multiple IB links

- Measure of some DB engine's TPC

- etc.

> Bart Van Assche.
>
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