On Thu, May 18, 2006 at 02:36:00AM -0500, Jonathan E Brassow wrote:
On May 18, 2006, at 2:27 AM, Luca Berra wrote:
On Thu, May 18, 2006 at 08:19:09AM +0100, Bob Gautier wrote:
On Thu, 2006-05-18 at 08:05 +0100, Bob Gautier wrote:
Yesterday my client was testing of multipath load balancing and
failover
on a system running ext3 on a logical volume which comprises about
ten
SAN LUNs all reached using multipath in multibus mode over two QL2340
HBAs.
Sorry, should have also said: RHEL4u3 x86_64 on DL385 with 16Gb memory
you could have added the storage model :)
btw did you do any tuning (i.e. readhaead, scheduler) ?
You may also want to do raw through-put testing (lmdd perhaps) to get a
baseline. Certainly, the file system has to be bringing down the
bandwidth somewhat...
in some cases even the partition alignment might introduce delays.
L.
--
Luca Berra -- bluca@xxxxxxxxxx
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