RE: Does XFS on hardware RAID5 have perfomance issues?

[Steve Lord <lord@sgi.com>]

On Thu, 2002-03-07 at 14:20, Murthy Kambhampaty wrote:
> > From: Steve Lord [mailto:lord@sgi.com]
> > Sent: Thursday, March 07, 2002 14:49
> ...
> > Subject: Re: Does XFS on hardware RAID5 have perfomance issues?
> ...
> > So I do not think it should matter. Let me guess, you do not like the
> > performance you are getting right now.
> 
> We have a SuperMicro S2QR6 motherboard with four PIII Xeon 500 MHz/2Mb cache
> and 4gb RAM (call it comp1). I get kernel compile times that are thrice as
> long as on a dual PIII 550 Mhz Katmai processor with 256 MB of RAM (call it
> comp2); importing a file into MySQL seems to take almost 50% longer on comp1
> than on comp2. So, I'm chasing down all the bottlenecks and trying to
> eliminate them. I thought the 2.4 kernel scaled well to sixteen processors,
> and there is no indication that the highmem configuration slows the kernel
> down this much, but I might have to get on the kernel mailing list with
> this.
> 
> Thanks for the response to my original question,
> 	Murthy

Is the disk setup the same in both - raid5 does have a cost.

Steve


-- 

Steve Lord                                      voice: +1-651-683-3511
Principal Engineer, Filesystem Software         email: lord@sgi.com