On Wed, Mar 19, 2008 at 11:07 PM, dan <[EMAIL PROTECTED]> wrote: > CPU e8400 3Ghz Dual Core. > single 7200rpm 16MB cache 200GB maxtor drive. > ubuntu 7.10
You don't mention how much memory you have in the machine... > FILE COUNT > 138581 634MB average of 4.68KB per file(coped the /etc directory 20 times) This doesn't look like a large enough data set, unless you are dropping all caches in between each test. See http://linux-mm.org/Drop_Caches You should run `sync; echo 3 > /proc/sys/vm/drop_caches` before each test. > find all files and run 'wc -l'(access speed) (wow zfs-fuse is slow here) > zfs compression=gzip 9.688 sec > zfs compression=off 10.734 sec > *ext3 .3218 sec > *reiserfs .431 sec > jfs 36.18 sec > *xfs .310 sec I've used jfs before and would have noticed that it performed an order of magnitude worse than the other filesystems - I have to think that there is something peculiar with your benchmark. > copy from RAM to disk(/dev/shm -> partition w/ filesystem. bus speed not a > factor) Why read from /dev/shm ? Something like this would be better: time dd if=/dev/zero of=/tmp/bigfile count=10000 bs=1M Adjust count as necessary to ensure that you are writing out significantly more data than you have available RAM. > issues:jfs and xfs both did write caching and then spent periods catching > up. > ext3 1m13s 8.68MB/s > jfs 3m21s 3.15MB/s > *reiserfs 20s 31.7MB/s (WOW!) > xfs 2m56s 3.60MB/s > zfs (CPU bound) 2m22.76s 4.44MB/s All of your numbers seem to be very slow. I would expect at least 25MB/s, probably 50MB/s for ext3, jfs, reiserfs and xfs. Could you try running an established disk IO benchmark tool like bonnie++? -Dave ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
