View source for Winter 2009 SYA810 Block Device Benchmark Scripts

Please post your block device benchmark script here. I'm looking for a wide range of benchmark methodologies, so your script should test in a different way than the other scripts. I will collect these scripts on '''Monday, Jan 26''' and create a master script which runs all of these tests and reports the overall results.

= P. Constantino =

 #!/bin/bash
 # This script generate random numbers and seeks to that POSITION on the block device given, reading 1 kb of data at the time. 
 # The purpose is test the speed of randomly reading 1024(default) blocks of 1KB from the disk.
 # A valid input for BLOCK DEVICE could be: /dev/sdb (disk) - /dev/sda9 (partition) - /dev/md8 (RAID) - /dev/mapper/foo/bar (LV).
 echo -n "Enter a number of block to read. Enter for default(1024): "
 read BLOCKS 
 if [ "$BLOCKS" = "" ]
 then
    BLOCKS=1024
 fi
 echo -n "Enter a valid block device (dev/): "
 read BLOCKDEVICE
 SIZE=$(df /dev/$BLOCKDEVICE | awk '{print $3}' | grep -v 'Used')
 time -p for ((x=1; x<=$BLOCKS; x++))
 	do 
 		POSITION=$(( RANDOM % $SIZE + 1))
 		dd if=/dev/$BLOCKDEVICE of=/dev/null bs=1k count=1 seek=$POSITION
 		sync
 		echo 3 >/proc/sys/vm/drop_caches
 	done	
 echo "  ^ time to process randomly $BLOCKS blocks of 1KB on /dev/$BLOCKDEVICE."

= Gregory Masseau = 
[http://matrix.senecac.on.ca/~gjmasseau/DiskTest.py Disk Test Script]

= Nestor CHAN = 
[http://matrix.senecac.on.ca/~tnchan/PerformanceTest/ Perfomance Test]

= Mohak Vyas =
[http://zenit.senecac.on.ca/wiki/index.php/Performancescript Performance Test]

=Varinder Singh=
[http://matrix.senecac.on.ca/~vsjhand/storage/python-scripts/ Python Performance Scripts]

Script in Python.Any suggestions would be welcome


=Kezhong Liang=
 #!/bin/bash
 echo "Start to test ..."
 TIME_WRITE_START=$(date +%s)
 dd if=/dev/zero of=test bs=1024 count=1000000
 sync
 TIME_WRITE_END=$(date +%s)
 echo 3 > /proc/sys/vm/drop_caches
 sync
 TIME_READ_START=$(date +%s)
 dd if=test of=/dev/null bs=1024 count=1000000
 TIME_READ_END=$(date +%s)
 rm test
 echo "--------------------------------------------------------"
 TIME_WRITE_USED=$(($TIME_WRITE_END - $TIME_WRITE_START))
 echo -n "The write disk performance: "
 echo -n $((1024 / $TIME_WRITE_USED))
 echo " MB/sec"
 TIME_READ_USED=$(($TIME_READ_END - $TIME_READ_START))
 echo -n "The read disk performance: "
 echo -n $((1024 / $TIME_READ_USED))
 echo " MB/sec"