RandRead - Storage/SSD

root@imap:~# fio --randrepeat=1 --ioengine=libaio --gtod_reduce=1 --name=test --filename=/dev/disk/by-path/pci-0000:02:04.0-scsi-0:0:6:0-part1 --bs=512K --iodepth=64 --size=4G --readwrite=randread --stonewall
test: (g=0): rw=randread, bs=512K-512K/512K-512K/512K-512K, ioengine=libaio, iodepth=64
fio-2.2.10
Starting 1 process
Jobs: 1 (f=6): [r(1)] [99.3% done] [54784KB/0KB/0KB /s] [107/0/0 iops] [eta 00m:01s]
test: (groupid=0, jobs=1): err= 0: pid=2062683: Sat Oct 13 12:56:59 2018
  read : io=4095.0MB, bw=31273KB/s, iops=61, runt=134088msec
  cpu          : usr=0.06%, sys=1.93%, ctx=28044, majf=0, minf=16422
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.2%, 32=0.4%, >=64=99.2%
     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    : total=r=8190/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
     latency   : target=0, window=0, percentile=100.00%, depth=64

Run status group 0 (all jobs):
   READ: io=4095.0MB, aggrb=31272KB/s, minb=31272KB/s, maxb=31272KB/s, mint=134088msec, maxt=134088msec

Disk stats (read/write):
    dm-0: ios=28054/576, merge=0/0, ticks=134240/740, in_queue=134988, util=98.14%, aggrios=14061/76, aggrmerge=0/212, aggrticks=67202/44, aggrin_queue=67238, aggrutil=64.29%
  sdb: ios=18797/137, merge=0/424, ticks=88224/88, in_queue=88300, util=64.29%
  sdau: ios=9326/15, merge=0/0, ticks=46180/0, in_queue=46176, util=33.85%
root@imap:~# fio --randrepeat=1 --ioengine=libaio --gtod_reduce=1 --name=test --filename=/dev/sdbg --bs=512K --iodepth=64 --size=4G --readwrite=randread --stonewall
test: (g=0): rw=randread, bs=512K-512K/512K-512K/512K-512K, ioengine=libaio, iodepth=64
fio-2.2.10
Starting 1 process
Jobs: 1 (f=1): [r(1)] [100.0% done] [293.6MB/0KB/0KB /s] [587/0/0 iops] [eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=2078016: Sat Oct 13 12:58:04 2018
  read : io=4096.0MB, bw=291940KB/s, iops=570, runt= 14367msec
  cpu          : usr=0.22%, sys=13.67%, ctx=32841, majf=0, minf=16416
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.2%, 32=0.4%, >=64=99.2%
     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    : total=r=8192/w=0/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
     latency   : target=0, window=0, percentile=100.00%, depth=64

Run status group 0 (all jobs):
   READ: io=4096.0MB, aggrb=291940KB/s, minb=291940KB/s, maxb=291940KB/s, mint=14367msec, maxt=14367msec

Disk stats (read/write):
  sdbg: ios=32240/0, merge=0/0, ticks=11996/0, in_queue=11996, util=84.34%