[DRBD-user] sync rate only 2,204 (1,220) K/sec?
peter at sabaini.at
Thu Oct 5 10:42:10 CEST 2006
On Wednesday 04 October 2006 19:30, Lars Ellenberg wrote:
> / 2006-10-04 18:36:40 +0200
> \ Peter Sabaini:
> > > > # hdparm -t /dev/cciss/c0d0
> > > >
> > > > /dev/cciss/c0d0:
> > > > Timing buffered disk reads: 208 MB in 3.03 seconds = 68.69 MB/sec
> > > >
> > > > It could be better, but its reasonable I think?
> well, actually, write performance would be more interesting.
> make sure that the raid is not rebuilding at the same time.
> also, the cciss controler likes high values for
Ok, that helped -- I now get around 23MB/s which is not great but a lot better
than before :-)
For the record I now use
I cant test right now but from an earlier naive test (dd if=/dev/zero
of=zero.dat bs=1M count=4096) write performance was around 32MB/s for the
disk device (ext3 on top of lvm), so thats the limiting factor now I guess.
Any advice on getting more out of that cciss? :-)
Thanks a lot,
ARC Seibersdorf research GmbH
Biomedical Engineering / eHealth systems
Reininghausstrasse 13/1, 8020 Graz, Austria
T: +43(0)316 586570-55, F:+43(0)316 586570-12
peter.sabaini at arcsmed.at, http://www.arcsmed.at/ehs
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