Measure IOPSs on the Dell R420

iops.md

Server

Storages & FileSystems

Gottfried ~ # fdisk -l /dev/sda

Disk /dev/sda: 599.6 GB, 599550590976 bytes, 1170997248 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xcc1ce4ca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1              63       80324       40131   de  Dell Utility
/dev/sda2   *       81920     1130495      524288   83  Linux
/dev/sda3         1130496   168902655    83886080   8e  Linux LVM
/dev/sda4       168902656  1170997247   501047296   83  Linux
Gottfried ~ # fdisk -l /dev/sdb

Disk /dev/sdb: 4000.2 GB, 4000225165312 bytes, 7812939776 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3b454267

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048    50333695    25165824   83  Linux
/dev/sdb2        50333696  1052772351   501219328   83  Linux

Gottfried ~ # mount | grep /mnt/sas
/dev/sda4 on /mnt/sas15k type xfs (rw)
/dev/sdb2 on /mnt/sas7.2k type xfs (rw)

Script

filesystem=xfs; datestr=$(date +%Y%m%d); for dev in sas15k sas7.2k
do
  for rw in randwrite randread write read
  do
    for i in $(seq 10)
    do
      (time fio -filename=/mnt/${dev}/fio.bin -ioengine=libaio -direct=1 -invalidate=1 -rw=${rw} -bs=4k -size=4G -numjobs=64 -runtime=180 -group_reporting -name=job1) > ~/fio.${rw}.${dev}.${filesystem}.${datestr}.${i}.txt 2>&1
    done
  done
done