test_io_perf_using_parallel_dd.bash

#!/usr/bin/env bash

set -x

# need to specify where to put the test file (on the target device)
if [ $# -eq 0 ] ; then
  echo "usage: $0 <target file on device>"
  exit 1
fi

# touch a file and see if we can read it
TEST_FILE_ON_TARGET_DEVICE=$1
touch ${TEST_FILE_ON_TARGET_DEVICE}

if [ $? -ne 0 ] ; then
  echo "cannot create ${TEST_FILE_ON_TARGET_DEVICE}"
  exit 1
fi

# check throughput in 16 threads MB/sec
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}1 bs=2G count=5 oflag=dsync iflag=fullblock seek=0 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}2 bs=2G count=5 oflag=dsync iflag=fullblock seek=10 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}3 bs=2G count=5 oflag=dsync iflag=fullblock seek=20 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}4 bs=2G count=5 oflag=dsync iflag=fullblock seek=30 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}5 bs=2G count=5 oflag=dsync iflag=fullblock seek=40 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}6 bs=2G count=5 oflag=dsync iflag=fullblock seek=50 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}7 bs=2G count=5 oflag=dsync iflag=fullblock seek=60 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}8 bs=2G count=5 oflag=dsync iflag=fullblock seek=70 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}9 bs=2G count=5 oflag=dsync iflag=fullblock seek=80 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}a bs=2G count=5 oflag=dsync iflag=fullblock seek=90 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}b bs=2G count=5 oflag=dsync iflag=fullblock seek=100 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}c bs=2G count=5 oflag=dsync iflag=fullblock seek=110 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}d bs=2G count=5 oflag=dsync iflag=fullblock seek=120 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}e bs=2G count=5 oflag=dsync iflag=fullblock seek=130 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}f bs=2G count=5 oflag=dsync iflag=fullblock seek=140 &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}0 bs=2G count=5 oflag=dsync iflag=fullblock seek=150 &

wait

# check latency IO/sec
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}1 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}1 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}2 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}3 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}4 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}5 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}6 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}7 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}8 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}9 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}10 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}11 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}12 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}13 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}14 bs=4096 count=50000 oflag=dsync &
dd if=/dev/zero of=${TEST_FILE_ON_TARGET_DEVICE}15 bs=4096 count=50000 oflag=dsync &

wait