Re: experiences with raid5: stripe_queue patches

2007-10-17 Thread Bernd Schubert
Hello Dan, hello Neil, thanks for your help! On Tuesday 16 October 2007 19:31:08 Dan Williams wrote: On Mon, 2007-10-15 at 08:03 -0700, Bernd Schubert wrote: Hi, in order to tune raid performance I did some benchmarks with and without the stripe queue patches. 2.6.22 is only for

Re: experiences with raid5: stripe_queue patches

2007-10-15 Thread Justin Piszcz
On Mon, 15 Oct 2007, Bernd Schubert wrote: Hi, in order to tune raid performance I did some benchmarks with and without the stripe queue patches. 2.6.22 is only for comparison to rule out other effects, e.g. the new scheduler, etc. It seems there is a regression with these patch regarding

Re: experiences with raid5: stripe_queue patches

2007-10-15 Thread Neil Brown
On Monday October 15, [EMAIL PROTECTED] wrote: Hi, in order to tune raid performance I did some benchmarks with and without the stripe queue patches. 2.6.22 is only for comparison to rule out other effects, e.g. the new scheduler, etc. Thanks! It seems there is a regression with these

RE: experiences with raid5: stripe_queue patches

2007-10-15 Thread Neil Brown
On Tuesday October 16, [EMAIL PROTECTED] wrote: In my opinion, one of ways to increase raid5 performance may be to change STRIPE_SIZE to to a bigger value. It is now equal to PAGE_SIZE. But we can't just change it simply, some other codes must be modified. I havn't tried,:). Maybe Neil can