Messages in this thread | | | Date | Tue, 24 Apr 2001 11:05:32 +0200 | From | Kurt Garloff <> | Subject | Re: read perf improved by mounting ext2? |
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On Tue, Apr 24, 2001 at 10:58:58AM +0200, Jens Axboe wrote: > On Tue, Apr 24 2001, Kurt Garloff wrote: > > There are enough partitions to see a clear pattern: Those with mounted ext2 > > filesystems perform better. Umounting them does not harm, they just need to > > have been mounted once. reiser or (v)fat however don't improve anything. > > swap does, as does a ext2 over raid5. > > You wouldn't happen to have 4kB ext2 filesystems on those?
Sure I do.
> When ext2 mounts, it sets the soft blocksize to that then, I would expect > this to give at least some benefit over using 1kB blocks (as your IDE > partition otherwise would have).
Why? Are the request sizes larger this way? This would mean that the overhead is very significant, turning a max of 26MB/s into 16MB/s!
If so, shouldn't we try to get the same effect also for the whole disk or other filesystems? Most notably reiser?
Regards, -- Kurt Garloff <garloff@suse.de> Eindhoven, NL GPG key: See mail header, key servers Linux kernel development SuSE GmbH, Nuernberg, FRG SCSI, Security [unhandled content-type:application/pgp-signature] | |