disk_performance_testing.sh

#!/bin/bash
#
# Larry Smith Jr.
# mrlesmithjr@gmail.com
# @mrlesmithjr
# http://everythingshouldbevirtual.com
#
# Variables
DD_BS="512 1024 2048 4096 8192 16384 1048576"  #define blocksizes to test in Bytes [512=512b, 1024=1k, 2048=2k, 1048576=1MB]
DD_CONV_OPTIONS="fdatasync,notrunc"  #define the output options to pass to dd when creating TESTFILE
DD_DEV_TEST="/dev/zero"  #define [/dev/zero, /dev/random, /dev/urandom]
DEV_MOUNTS="/"  #define the mountpoints to test in which your DEVS are mounted [/ /mnt/disk2 /mnt/disk3]
DEVS="/dev/sda"  #define the disk(s) device name(s) to test [/dev/sda /dev/sdb /dev/sdc]
LOOP_COUNT="1"  #define the number of times to run each test...generally 4-5 times would be good
TESTFILE="TESTFILE"  #define location and filename to create for testing...ensure you are testing on the correct /dev
TESTFILE_SIZE="1073741824"  #define size in Bytes [1GB=1073741824]
#
#
#
# Install pre-reqs
if [ -f /etc/debian_version ]; then
  apt-get -y install pv hdparm
fi
if [ -f /etc/redhat-release ]; then
  codename="$(gawk -F= '/^NAME/{print $2}' /etc/os-release)"
  if [[ $codename != "Fedora" ]]; then
    yum -y install epel-release
    yum -y install pv hdparm
  fi
  if [[ $codename == "Fedora" ]]; then
    dnf -y install pv hdparm
  fi
fi
clear
#
echo "testing sequential reads"
echo "========================"
for i in {1..$LOOP_COUNT}
do
  for DEV in $DEVS
  do
    hdparm -Tt $DEV
  done
done
echo "testing read/write speeds"
echo "========================="
echo ""
for i in {1..$LOOP_COUNT}
do
  for MOUNT in $DEV_MOUNTS
  do
    for BLOCK_SIZE in $DD_BS
    do
      DD_COUNT=$(($TESTFILE_SIZE / $BLOCK_SIZE))
      PV_SIZE=$(($TESTFILE_SIZE / 1024 ))k
      if [ $DD_COUNT -le 0 ]; then
        break
      fi

      echo "testing write speeds on $MOUNT using (bs=$BLOCK_SIZE count=$DD_COUNT size=$PV_SIZE)"
      echo "==================================================================================="
      echo ""
      dd if=$DD_DEV_TEST bs=$BLOCK_SIZE count=$DD_COUNT | pv -s $PV_SIZE | dd of=$MOUNT/$TESTFILE conv=$DD_CONV_OPTIONS
      echo ""
      echo "clearing buffer-cache"
      echo "====================="
      echo ""
      sync
      echo 3 > /proc/sys/vm/drop_caches
      echo ""
      echo "testing read speeds on $MOUNT using (bs=$BLOCK_SIZE count=$DD_COUNT size=$PV_SIZE)"
      echo "=================================================================================="
      echo ""
      dd if=$MOUNT/$TESTFILE bs=$BLOCK_SIZE count=$DD_COUNT | pv -s $PV_SIZE | dd of=/dev/null
      echo ""
      echo "testing buffer-cache speeds on $MOUNT using (bs=$BLOCK_SIZE count=$DD_COUNT size=$PV_SIZE)"
      echo "=========================================================================================="
      echo ""
      dd if=$MOUNT/$TESTFILE bs=$BLOCK_SIZE count=$DD_COUNT | pv -s $PV_SIZE | dd of=/dev/null
      echo ""
    done
    echo ""
    echo "Cleaning up"
    echo ""
    rm $MOUNT/$TESTFILE
  done
done