On Wed, Apr 04, 2007 at 09:29:46AM -0400, Justin Piszcz wrote:
Please see below for "time" output.
| # time for i in `seq 1 100000`; do dd if=/dev/zero of=$i bs=1k count=20
/dev/null 2>&1; done
| real 6m6.814s
| user 0m30.290s
| sys 2m42.562s
| # time rm -rf y
| real 5m18.034s
| user 0m0.036s
| sys 0m8.169s
Deletes on XFS is one area that is a little slower than other filesystems.
You can increase the log size during the creation of the filesystem and
also increase logbufs to 8 and that might help.
Thanks for your suggestions.
I also tried to increase the log size and logbufs mount option. This
optimizes create and delete times to the above values (with default options
both are around 9-10 minutes).
The strange thing is that on a similar Dell machines using XFS, too,
deletes take only ten seconds which would match user and system time.
More than five minutes for deleting 100000 files where ext3 needs
3 seconds on the same machine is actually more than a little bit slower
- to my mind there must be something wrong. JFS needs around 18 seconds.
However I am not sure if the problem is hardware or software related.
I've also tried to use the newest 3ware firmware - but this did not lead
to an improvement.
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