random-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=4
...
fio-3.41
Starting 4 processes
random-write: Laying out IO file (1 file / 256MiB)
random-write: Laying out IO file (1 file / 256MiB)
random-write: Laying out IO file (1 file / 256MiB)
random-write: Laying out IO file (1 file / 256MiB)
note: both iodepth >= 1 and synchronous I/O engine are selected, queue depth will be capped at 1
note: both iodepth >= 1 and synchronous I/O engine are selected, queue depth will be capped at 1
note: both iodepth >= 1 and synchronous I/O engine are selected, queue depth will be capped at 1
note: both iodepth >= 1 and synchronous I/O engine are selected, queue depth will be capped at 1

random-write: (groupid=0, jobs=1): err= 0: pid=1174: Sun Apr 12 14:42:47 2026
  write: IOPS=61.9k, BW=242MiB/s (254MB/s)(14.2GiB/60301msec); 0 zone resets
    clat (nsec): min=1640, max=58393k, avg=5595.86, stdev=145221.33
     lat (nsec): min=1680, max=58393k, avg=5686.82, stdev=146300.42
    clat percentiles (nsec):
     |  1.00th=[   1960],  5.00th=[   2128], 10.00th=[   2256],
     | 20.00th=[   2352], 30.00th=[   2480], 40.00th=[   2576],
     | 50.00th=[   2672], 60.00th=[   2768], 70.00th=[   2928],
     | 80.00th=[   3088], 90.00th=[   3472], 95.00th=[   4256],
     | 99.00th=[  11456], 99.50th=[  60160], 99.90th=[ 211968],
     | 99.95th=[ 501760], 99.99th=[7766016]
   bw (  KiB/s): min=  207, max=524288, per=30.88%, avg=309293.05, stdev=162095.20, samples=96
   iops        : min=   51, max=131072, avg=77323.10, stdev=40523.80, samples=96
  lat (usec)   : 2=1.05%, 4=92.91%, 10=4.97%, 20=0.27%, 50=0.24%
  lat (usec)   : 100=0.22%, 250=0.26%, 500=0.04%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%
  lat (msec)   : 100=0.01%
  cpu          : usr=4.93%, sys=57.25%, ctx=2574, majf=0, minf=12
  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 rwts: total=0,3735553,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=4
random-write: (groupid=0, jobs=1): err= 0: pid=1175: Sun Apr 12 14:42:47 2026
  write: IOPS=63.5k, BW=248MiB/s (260MB/s)(14.6GiB/60295msec); 0 zone resets
    clat (nsec): min=1600, max=59637k, avg=5603.57, stdev=146361.00
     lat (nsec): min=1680, max=59637k, avg=5689.83, stdev=147320.63
    clat percentiles (nsec):
     |  1.00th=[   1960],  5.00th=[   2128], 10.00th=[   2256],
     | 20.00th=[   2352], 30.00th=[   2480], 40.00th=[   2576],
     | 50.00th=[   2672], 60.00th=[   2768], 70.00th=[   2928],
     | 80.00th=[   3088], 90.00th=[   3472], 95.00th=[   4320],
     | 99.00th=[  13248], 99.50th=[  58112], 99.90th=[ 209920],
     | 99.95th=[ 456704], 99.99th=[7897088]
   bw (  KiB/s): min= 3520, max=525338, per=29.13%, avg=291795.75, stdev=164365.23, samples=104
   iops        : min=  880, max=131334, avg=72948.74, stdev=41091.30, samples=104
  lat (usec)   : 2=1.12%, 4=92.77%, 10=4.99%, 20=0.29%, 50=0.27%
  lat (usec)   : 100=0.24%, 250=0.24%, 500=0.04%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%
  lat (msec)   : 100=0.01%
  cpu          : usr=5.13%, sys=57.67%, ctx=2657, majf=0, minf=12
  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 rwts: total=0,3827948,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=4
random-write: (groupid=0, jobs=1): err= 0: pid=1176: Sun Apr 12 14:42:47 2026
  write: IOPS=59.9k, BW=234MiB/s (246MB/s)(13.8GiB/60136msec); 0 zone resets
    clat (nsec): min=1640, max=56862k, avg=5785.93, stdev=154163.60
     lat (nsec): min=1680, max=56862k, avg=5885.68, stdev=155315.10
    clat percentiles (nsec):
     |  1.00th=[   1960],  5.00th=[   2128], 10.00th=[   2256],
     | 20.00th=[   2352], 30.00th=[   2480], 40.00th=[   2576],
     | 50.00th=[   2672], 60.00th=[   2768], 70.00th=[   2928],
     | 80.00th=[   3088], 90.00th=[   3472], 95.00th=[   4320],
     | 99.00th=[  12608], 99.50th=[  63744], 99.90th=[ 252928],
     | 99.95th=[ 634880], 99.99th=[7897088]
   bw (  KiB/s): min=  878, max=524288, per=28.06%, avg=281092.35, stdev=146134.37, samples=102
   iops        : min=  219, max=131072, avg=70272.89, stdev=36533.63, samples=102
  lat (usec)   : 2=1.09%, 4=92.71%, 10=5.08%, 20=0.29%, 50=0.25%
  lat (usec)   : 100=0.19%, 250=0.28%, 500=0.05%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%
  lat (msec)   : 100=0.01%
  cpu          : usr=4.68%, sys=57.35%, ctx=2280, majf=0, minf=11
  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 rwts: total=0,3604481,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=4
random-write: (groupid=0, jobs=1): err= 0: pid=1177: Sun Apr 12 14:42:47 2026
  write: IOPS=65.4k, BW=255MiB/s (268MB/s)(15.0GiB/60137msec); 0 zone resets
    clat (nsec): min=1640, max=56905k, avg=5459.47, stdev=141104.84
     lat (nsec): min=1680, max=56905k, avg=5561.11, stdev=142654.93
    clat percentiles (nsec):
     |  1.00th=[   1960],  5.00th=[   2160], 10.00th=[   2256],
     | 20.00th=[   2352], 30.00th=[   2480], 40.00th=[   2576],
     | 50.00th=[   2672], 60.00th=[   2800], 70.00th=[   2928],
     | 80.00th=[   3120], 90.00th=[   3472], 95.00th=[   4256],
     | 99.00th=[  11072], 99.50th=[  53504], 99.90th=[ 195584],
     | 99.95th=[ 428032], 99.99th=[7307264]
   bw (  KiB/s): min= 6015, max=524288, per=31.28%, avg=313304.30, stdev=169274.53, samples=100
   iops        : min= 1503, max=131072, avg=78326.13, stdev=42318.24, samples=100
  lat (usec)   : 2=1.03%, 4=92.85%, 10=5.06%, 20=0.28%, 50=0.26%
  lat (usec)   : 100=0.20%, 250=0.24%, 500=0.03%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%
  lat (msec)   : 100=0.01%
  cpu          : usr=5.35%, sys=58.59%, ctx=2386, majf=0, minf=11
  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 rwts: total=0,3932161,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=4

Run status group 0 (all jobs):
  WRITE: bw=978MiB/s (1026MB/s), 234MiB/s-255MiB/s (246MB/s-268MB/s), io=57.6GiB (61.8GB), run=60136-60301msec

Disk stats (read/write):
  vdb: ios=1/150810, sectors=8/120634256, merge=0/416, ticks=0/3097373, in_queue=3097374, util=82.19%
