On Wed, 2006-07-05 at 17:47 +0200, Marten Lehmann wrote: > Hello > > > Really? Nice. But you would have to re-create the ext3 filesystem with > > this newer 2.6 kernel, right? Or would tune2fs do the job given the > > right options? > > I once enabled the index-option with tune2fs on an old ext3 filesystem > at 2.4 kernel which didn't give much performance boost. But partitions I > created on new 2.6 kernel systems worked well. You have to actually use 'e2fsck -D -f /dev/XXX' to re-hash the directories when you change this. For anyone curious, RHEL3's 2.4 kernel also supports indexed directories, which you can enable with: tune2fs -O dir_index /dev/XXX For a write-intensive filesystem, one might also want to increase the journal size; I believe the perceived hangs are caused by the journal needing to be flushed too often. Here's a message where Ted Ts'o mentions it: http://lopsa.org/pipermail/discuss/2006-February/000810.html Adding 'noatime' probably helps too. Of course, if you can move the Journal Block Device elsewhere, like a faster region of the disk(s) or another spindle that will likely help considerably too. Wil -- Wil Cooley <wcooley@xxxxxxxxxxx> Naked Ape Consulting, Ltd
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