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.