Nils Rennebarth wrote:
>
> I use the 2.4.0-test5-pre3 kernel together with Andre Hedricks ide patch
> ide.2.4.0-t5-2.all.4c.patch.bz2 and reiserfs
>
> The machine is a Athlon 650, equipped with 256MB of RAM.
> 6 IBM UDMA-66 drives of 46GB each, hanging on three Promise 20262 IDE
> controllers form a raid5 software raid, reiserfs is the filesystem used
> on /dev/md0
>
> I'm a bit dissapointed with the read performance being about the same as
> reading from a single disk (using bonnie with size set to 500MB)
>
> - Is bonnie not the right benchmark to use here? What may be better ones
> - Is there still another kernel patch needed for read balancing?
> - Am I the only one with this problem?
>
> Nils
>
Read balancing patch is just for raid-1 and it has been integrated into
the main kernel already.
Your not the only one with the problem, unfortunately 2.4 just gives
crap performance, it has been reported every few weeks on the
linux-kernel mailing list, i dont know if anyone has worked out why,
dont hold your breath.
I found that with raid0 in 2.4 having 2 disks gives a good performance
increase, but any extra disks dont improve things much at all.
I just hope that when they do find the problem its fixable in this
release cycle.
My advice, plan on staying with 2.2 for a fair while
Glenn
