On Thursday March 20, keld@dkuu... wrote:
> On Sat, Mar 15, 2008 at 12:11:51AM +0100, Keld Jørn Simonsen wrote:
> > Hi
> > I have a 4 drive array with 1 TB Hitachi disks, formatted as raid10,f2
> > I had some strange observations:
> > 1. while resyncing I could get the raid to give me about 320 MB/s in
> > sequential read, which was good. After resync had been done, and with
> > all 4 drives active, I only get 115 MB/s.
> This was reproducable. I dont know what could be wrong.
Is this with, or without, your patch to avoid "read-balancing" for
It sounds like it is without that patch ????
> I tried to enlarge my readahed, but the system did not allow me to have
> more than a 2 MiB readahed, - well that should be ok for a 4 disk array
> with 256 kiB chunks?
> I did try to have chunks of 64 kiB - but no luck.
> It seemed like it is something that the resync process builds up.
> What could it be?
> Best regards
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