Here are my testing scripts used in the performance howto:
http://linux-raid.osdl.org/index.php/Home_grown_testing_methods
=Hard disk performance scripts=
Here are the scripts that I used for my performance measuring. Use at your own
risk.
They destroy the contents of the partitions involved. The /dev/md raid needs to
be stopped before initiating the test.
Copyright Keld Simonsen, [EMAIL PROTECTED] 2008. Licensed under the GPL.
iotest:
#!/bin/sh
# invoked by
# iotest "mdadm -R -C /dev/md1 --chunk=256 -l 10 -n 2 -p f2 " /dev/md1
/mnt/md1 ext3 " /dev/hdb5 /dev/hdd5 "
echo "\n" $1 $5 "\n" >> /tmp/results
echo $1 $5
$1 $5
mkfs -t $4 $2
mkdir $3
mount $2 $3
cd $3
echo "\nmakefiles\n" >> /tmp/results
mkfiles 200
echo "\n remakefiles \n" >>/tmp/results
mkfiles 200
echo "\n catall \n" >>/tmp/results
cat * >/dev/null
echo "\n catnull \n" >>/tmp/results
catnull
cd
umount $2
mdadm -S $2
echo "\n finish " $1 " " $5 "\n" >> /tmp/results
Be careful with this script, and remember to change the ordinary test to only
one partition
iorun:
#!/bin/sh
# set up ram disk
DISKS="/dev/sda2 /dev/sdb2"
iostat -k 10 > /tmp/results &
iotest " " /dev/sda2
/mnt/sda2 ext3 " "
iotest "mdadm -C /dev/md1 --chunk=256 -R -l 0 -n 2 " /dev/md1 /mnt/md1
ext3 "$DISKS"
iotest "mdadm -C /dev/md1 --chunk=256 -R -l 1 -n 2 " /dev/md1 /mnt/md1
ext3 "$DISKS"
iotest "mdadm -C /dev/md1 --chunk=256 -R -l 10 -n 2 " /dev/md1 /mnt/md1
ext3 "$DISKS"
iotest "mdadm -C /dev/md1 --chunk=256 -R -l 10 -n 2 -p f2 " /dev/md1
/mnt/md1 ext3 "$DISKS"
# iotest "mdadm -C /dev/md1 --chunk=256 -R -l 10 -n 2 -p o2 " /dev/md1
/mnt/md1 ext3 "$DISKS"
mkfiles:
#!/bin/sh
for (( i = 1; i < $1 ; i++ )) ; do dd if=/dev/hda1 of=$i bs=1MB count=40 ;
done
for (( i = 1; i < $1 ; i++ )) ; do dd if=/dev/hda1 of=$i bs=1MB count=40 & ;
done
catnull:
#!/bin/tcsh
foreach i ( * )
cat $i >/dev/null &
end
wait
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