Re: Integration of SCST in the mainstream Linux kernel

Linus Torvalds
2008-02-05T18:19:19Z

On Tue, 5 Feb 2008, Bart Van Assche wrote:
>
> Results that I did not expect:
> * A block transfer size of 1 MB is not enough to measure the maximal
> throughput. The maximal throughput is only reached at much higher
> block sizes (about 10 MB for SCST + SRP and about 100 MB for STGT +
> iSER).

Block transfer sizes over about 64kB are totally irrelevant for 99% of all
people.

Don't even bother testing anything more. Yes, bigger transfers happen, but
a lot of common loads have *smaller* transfers than 64kB.

So benchmarks that try to find "theoretical throughput" by just making big
transfers should just be banned. They give numbers, yes, but the numbers
are pointless.

Linus