efs-randamwrite-bs4k

$ fio -filename=efs/test2g -direct=1 -rw=randwrite -bs=4k -size=2G -numjobs=64 -runtime=60 -group_reporting -name=file1
file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
...
file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
fio-2.1.5
Starting 64 processes
Jobs: 64 (f=52): [wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww] [100.0% done] [0KB/1272KB/0KB /s] [0/318/0 iops] [eta 00m:00s]
file1: (groupid=0, jobs=64): err= 0: pid=2918: Wed Jun 29 07:50:31 2016
  write: io=76032KB, bw=1262.5KB/s, iops=315, runt= 60228msec
    clat (msec): min=8, max=366, avg=163.02, stdev=13.49
     lat (msec): min=8, max=366, avg=163.02, stdev=13.49
    clat percentiles (msec):
     |  1.00th=[  114],  5.00th=[  157], 10.00th=[  159], 20.00th=[  161],
     | 30.00th=[  161], 40.00th=[  163], 50.00th=[  163], 60.00th=[  163],
     | 70.00th=[  165], 80.00th=[  167], 90.00th=[  169], 95.00th=[  172],
     | 99.00th=[  217], 99.50th=[  223], 99.90th=[  243], 99.95th=[  255],
     | 99.99th=[  363]
    bw (KB  /s): min=    0, max=   85, per=1.89%, avg=23.83, stdev= 2.51
    lat (msec) : 10=0.04%, 20=0.07%, 50=0.13%, 100=0.53%, 250=99.16%
    lat (msec) : 500=0.07%
  cpu          : usr=0.00%, sys=0.01%, ctx=19602, majf=0, minf=435
  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    : total=r=0/w=19008/d=0, short=r=0/w=0/d=0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: io=76032KB, aggrb=1262KB/s, minb=1262KB/s, maxb=1262KB/s, mint=60228msec, maxt=60228msec