Fio Random Write

fio --randrepeat=1 --size=5G --ioengine=libaio --direct=1 --gtod_reduce=1 --bs=4k --iodepth=64 --readwrite=randwrite --name=MY_TEST --filename=TEST_TO_DELETE && rm TEST_TO_DELETE

Running on a NFS filsystems:

fio --randrepeat=1 --size=5G --ioengine=libaio --direct=1 --gtod_reduce=1 --bs=4k --iodepth=64 --readwrite=write --name=MY_TEST --filename=TEST_TO_DELETE && rm TEST_TO_DELETE
MY_TEST: (g=0): rw=write, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=64
fio-3.1
Starting 1 process
MY_TEST: Laying out IO file (1 file / 5120MiB)
fio: native_fallocate call failed: Operation not supported
Jobs: 1 (f=1): [W(1)][100.0%][r=0KiB/s,w=21.1MiB/s][r=0,w=5405 IOPS][eta 00m:00s]
MY_TEST: (groupid=0, jobs=1): err= 0: pid=29315: Wed Apr 22 13:10:10 2020
  write: IOPS=5457, BW=21.3MiB/s (22.4MB/s)(5120MiB/240155msec)
   bw (  KiB/s): min=15168, max=27712, per=99.99%, avg=21829.49, stdev=2390.61, samples=480
   iops        : min= 3792, max= 6928, avg=5457.36, stdev=597.65, samples=480
  cpu          : usr=0.59%, sys=2.00%, ctx=289611, majf=0, minf=9
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.1%, >=64=100.0%
     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=0.1%, >=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=64

Run status group 0 (all jobs):
  WRITE: bw=21.3MiB/s (22.4MB/s), 21.3MiB/s-21.3MiB/s (22.4MB/s-22.4MB/s), io=5120MiB (5369MB), run=240155-240155msec

See also

• fio, Fio Sequential Write, Fio Random Write, Fio Random read