On Fri, 20 Jun 2008 at 9:55am, Florin Andrei wrote
Florin Andrei wrote:
Anyway, I did a test with the 2.6.18-93.el5.bz444759 kernel and there's no
difference: 65 minutes, 27 MB/s. Looks like it doesn't matter which kernel
I use, at least for this simple test with dd.
I wonder if a test closer to real life, such as reading/writing stuff
from/to MySQL, would produce different results. I guess there's only one
way to find out. ;-)
As a side note, the artificial benchmark reveals a huge difference between
Ext3 and XFS - the latter is much faster when writing. Might be an artifact
of some setting (after all, I do use a hardware RAID card). But the
difference is very real.
I was planning to use XFS anyway, so I'm not sure if I'll spend too much time
troubleshooting Ext3.
I don't think this is some kind of hidden effect of the MWI bug.
XFS has *always* been faster on 3ware than ext3. RH has never been
interested in looking at why. *shrug*
--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
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