disk-tests.sh

=============================================================================================================================================
BEFORE
=============================================================================================================================================


root@k8s-master-01:/home/carldanley# fio --rw=write --ioengine=sync --fdatasync=1 --directory=test-data --size=22m --bs=2300 --name=mytest
mytest: (g=0): rw=write, bs=(R) 2300B-2300B, (W) 2300B-2300B, (T) 2300B-2300B, ioengine=sync, iodepth=1
fio-3.1
Starting 1 process
mytest: Laying out IO file (1 file / 22MiB)
Jobs: 1 (f=1): [W(1)][100.0%][r=0KiB/s,w=481KiB/s][r=0,w=214 IOPS][eta 00m:00s]
mytest: (groupid=0, jobs=1): err= 0: pid=5906: Tue Feb 11 03:34:27 2020
  write: IOPS=142, BW=321KiB/s (329kB/s)(21.0MiB/70205msec)
    clat (usec): min=2, max=8136, avg=13.53, stdev=198.42
     lat (usec): min=3, max=8136, avg=13.85, stdev=198.43
    clat percentiles (usec):
     |  1.00th=[    4],  5.00th=[    5], 10.00th=[    5], 20.00th=[    5],
     | 30.00th=[    7], 40.00th=[    8], 50.00th=[    9], 60.00th=[   10],
     | 70.00th=[   10], 80.00th=[   11], 90.00th=[   14], 95.00th=[   17],
     | 99.00th=[   25], 99.50th=[   29], 99.90th=[   67], 99.95th=[ 8094],
     | 99.99th=[ 8160]
   bw (  KiB/s): min=    8, max=  489, per=100.00%, avg=403.56, stdev=125.43, samples=111
   iops        : min=    4, max=  218, avg=179.90, stdev=55.86, samples=111
  lat (usec)   : 4=1.96%, 10=70.95%, 20=25.04%, 50=1.90%, 100=0.06%
  lat (usec)   : 250=0.02%
  lat (msec)   : 10=0.06%
  cpu          : usr=0.08%, sys=0.41%, ctx=15695, majf=0, minf=13
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwt: total=0,10029,0, short=0,0,0, dropped=0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: bw=321KiB/s (329kB/s), 321KiB/s-321KiB/s (329kB/s-329kB/s), io=21.0MiB (23.1MB), run=70205-70205msec

Disk stats (read/write):
  sda: ios=2/22426, merge=0/12206, ticks=52/86276, in_queue=86324, util=99.15%
root@k8s-master-01:/home/carldanley# fio --version
fio-3.1
root@k8s-master-01:/home/carldanley# ^C
root@k8s-master-01:/home/carldanley# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2.29366 s, 468 MB/s
root@k8s-master-01:/home/carldanley# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 6.75749 s, 159 MB/s




=============================================================================================================================================
AFTER (https://communities.vmware.com/thread/554004)
=============================================================================================================================================


root@k8s-master-01:/home/carldanley# fio --rw=write --ioengine=sync --fdatasync=1 --directory=test-data --size=22m --bs=2300 --name=mytest
mytest: (g=0): rw=write, bs=(R) 2300B-2300B, (W) 2300B-2300B, (T) 2300B-2300B, ioengine=sync, iodepth=1
fio-3.1
Starting 1 process
Jobs: 1 (f=1)
mytest: (groupid=0, jobs=1): err= 0: pid=1430: Tue Feb 11 12:14:08 2020
  write: IOPS=5534, BW=12.1MiB/s (12.7MB/s)(21.0MiB/1812msec)
    clat (usec): min=2, max=8160, avg=67.59, stdev=127.86
     lat (usec): min=2, max=8161, avg=67.76, stdev=127.90
    clat percentiles (usec):
     |  1.00th=[    3],  5.00th=[    3], 10.00th=[    3], 20.00th=[    3],
     | 30.00th=[    3], 40.00th=[    4], 50.00th=[  100], 60.00th=[  104],
     | 70.00th=[  112], 80.00th=[  118], 90.00th=[  125], 95.00th=[  133],
     | 99.00th=[  147], 99.50th=[  157], 99.90th=[  281], 99.95th=[ 1287],
     | 99.99th=[ 7046]
   bw (  KiB/s): min= 5565, max=18323, per=89.47%, avg=11122.00, stdev=6535.95, samples=3
   iops        : min= 2478, max= 8158, avg=4952.00, stdev=2909.89, samples=3
  lat (usec)   : 4=41.54%, 10=1.71%, 20=0.56%, 50=0.04%, 100=5.94%
  lat (usec)   : 250=50.07%, 500=0.06%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.02%, 4=0.02%, 10=0.02%
  cpu          : usr=2.26%, sys=12.31%, ctx=15697, majf=0, minf=12
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwt: total=0,10029,0, short=0,0,0, dropped=0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: bw=12.1MiB/s (12.7MB/s), 12.1MiB/s-12.1MiB/s (12.7MB/s-12.7MB/s), io=21.0MiB (23.1MB), run=1812-1812msec

Disk stats (read/write):
  sda: ios=4862/8670, merge=0/0, ticks=512/1404, in_queue=1916, util=83.34%
root@k8s-master-01:/home/carldanley# fio --version
fio-3.1
root@k8s-master-01:/home/carldanley# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.05268 s, 1.0 GB/s
root@k8s-master-01:/home/carldanley# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.979683 s, 1.1 GB/s