On Wed, 16 Jan 2008, Greg Cormier wrote:
What sort of tools are you using to get these benchmarks, and can I
used them for ext3?
Very interested in running this on my server.
Thanks,
Greg
You can use whatever suits you, such as untar kernel source tree, copy files,
untar backups, etc--, you should benchmark specifically what *your* workload is.
Here is the skeleton, using bash:: (don't forget to turn off the cron
daemon)
for i in 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768 65536
do
cd /
umount /r1
mdadm -S /dev/md3
mdadm --create --assume-clean --verbose /dev/md3 --level=5 --raid-devices=10
--chunk=$i --run /dev/sd[c-l]1
/etc/init.d/oraid.sh # to optimize my raid stuff
mkfs.xfs -f /dev/md3
mount /dev/md3 /r1 -o logbufs=8,logbsize=262144
# then simply add what you do often here
# everyone's workload is different
/usr/bin/time -f %E -o ~/$i=chunk.txt bash -c 'dd if=/dev/zero of=/r1/bigfile
bs=1M count=10240; sync'
done
Then just, grep : /root/*chunk* | sort -n to get the results in the same format.
Justin.
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