Fio Random read

fio --randrepeat=1 --size=5G --ioengine=libaio --direct=1 --gtod_reduce=1 --bs=4k --iodepth=64 --readwrite=randread --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=randread --name=MY_TEST --filename=TEST_TO_DELETE && rm TEST_TO_DELETE
MY_TEST: (g=0): rw=randread, 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): [r(1)][100.0%][r=40.9MiB/s,w=0KiB/s][r=10.5k,w=0 IOPS][eta 00m:00s]
MY_TEST: (groupid=0, jobs=1): err= 0: pid=29820: Wed Apr 22 13:19:52 2020
   read: IOPS=9350, BW=36.5MiB/s (38.3MB/s)(5120MiB/140177msec)
   bw (  KiB/s): min=20768, max=60888, per=99.98%, avg=37392.94, stdev=6705.09, samples=280
   iops        : min= 5192, max=15222, avg=9348.23, stdev=1676.28, samples=280
  cpu          : usr=1.23%, sys=3.63%, ctx=478300, majf=0, minf=72
  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=1310720,0,0, short=0,0,0, dropped=0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=64

Run status group 0 (all jobs):
   READ: bw=36.5MiB/s (38.3MB/s), 36.5MiB/s-36.5MiB/s (38.3MB/s-38.3MB/s), io=5120MiB (5369MB), run=140177-140177msec

See also

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