Benchmark disk performance using fio

fio

Sequencial write (direct=1)

cat write-test-sequential.fio 
; Sequential write of 5G of data

[write]
rw=write
size=5G
direct=1
directory=/tmp/fio-testing

fio write-test-sequential.fio

Sequencial write

cat write-test-sequential.fio 
; Sequential write of 5G of data

[write]
rw=write
size=5G
directory=/tmp/fio-testing

fio write-test-sequential.fio

write: (g=0): rw=write, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=1
fio-3.1
Starting 1 process
write: Laying out IO file (1 file / 5120MiB)
Jobs: 1 (f=1): [W(1)][100.0%][r=0KiB/s,w=0KiB/s][r=0,w=0 IOPS][eta 00m:00s]       
write: (groupid=0, jobs=1): err= 0: pid=16195: Thu Nov 14 03:32:30 2019
  write: IOPS=10.4k, BW=40.5MiB/s (42.4MB/s)(5120MiB/126508msec)
    clat (usec): min=2, max=14908k, avg=93.09, stdev=17824.79
     lat (usec): min=3, max=14908k, avg=93.90, stdev=17824.81
    clat percentiles (usec):
     |  1.00th=[    4],  5.00th=[    4], 10.00th=[    4], 20.00th=[    4],
     | 30.00th=[    4], 40.00th=[    5], 50.00th=[    6], 60.00th=[    7],
     | 70.00th=[    8], 80.00th=[    8], 90.00th=[   10], 95.00th=[   13],
     | 99.00th=[   30], 99.50th=[   76], 99.90th=[11863], 99.95th=[17695],
     | 99.99th=[53740]
   bw (  KiB/s): min=    8, max=349496, per=100.00%, avg=73294.39, stdev=71932.95, samples=143
   iops        : min=    2, max=87374, avg=18323.57, stdev=17983.24, samples=143
  lat (usec)   : 4=31.53%, 10=59.10%, 20=7.56%, 50=1.09%, 100=0.28%
  lat (usec)   : 250=0.19%, 500=0.06%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.04%, 20=0.08%, 50=0.03%
  lat (msec)   : 100=0.01%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2000=0.01%, >=2000=0.01%
  cpu          : usr=2.39%, sys=9.13%, ctx=18073, 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=0,1310720,0, 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=40.5MiB/s (42.4MB/s), 40.5MiB/s-40.5MiB/s (42.4MB/s-42.4MB/s), io=5120MiB (5369MB), run=126508-126508msec

Disk stats (read/write):
  sdb: ios=7807/12020, merge=174/2442, ticks=1983580/9352748, in_queue=11942308, util=68.67%

clat - Completion latency percentiles

slat - Submission latency

Related terms

• IO performance

See also

• cp, dd, sftp, scp, rsync, casync, mv, fio, ln, docker cp, kubectl cp, minikube cp, multipass transfer, Copy-Item, Xcopy
• fio, Fio Sequential Write, Fio Random Write, Fio Random read
• IO performance: iotop, iostat, sar -d, fio, nmon, vmstat -d, dd, nmon, stress

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Source: wikiversity