random-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=4
...
fio-3.42
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=1182: Tue Sep  1 03:48:45 2026
  write: IOPS=122k, BW=475MiB/s (498MB/s)(28.0GiB/60366msec)
    clat (nsec): min=1600, max=6575.0k, avg=3210.33, stdev=15331.47
     lat (nsec): min=1640, max=6575.0k, avg=3273.18, stdev=15432.41
    clat percentiles (nsec):
     |  1.00th=[  1960],  5.00th=[  2096], 10.00th=[  2192], 20.00th=[  2320],
     | 30.00th=[  2416], 40.00th=[  2480], 50.00th=[  2576], 60.00th=[  2672],
     | 70.00th=[  2800], 80.00th=[  2960], 90.00th=[  3376], 95.00th=[  4832],
     | 99.00th=[ 12224], 99.50th=[ 14656], 99.90th=[ 39168], 99.95th=[158720],
     | 99.99th=[700416]
   bw (  KiB/s): min=76344, max=823736, per=25.78%, avg=488798.99, stdev=123970.00, samples=120
   iops        : min=19088, max=205934, avg=122199.62, stdev=30992.49, samples=120
  lat (usec)   : 2=1.39%, 4=91.95%, 10=5.12%, 20=1.29%, 50=0.16%
  lat (usec)   : 100=0.02%, 250=0.02%, 500=0.01%, 750=0.02%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%
  cpu          : usr=5.84%, sys=61.02%, ctx=4705, majf=0, minf=9
  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=0,7340033,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0.00ns, window=0.00ns, percentile=100.00%, depth=4
random-write: (groupid=0, jobs=1): err= 0: pid=1183: Tue Sep  1 03:48:45 2026
  write: IOPS=120k, BW=470MiB/s (492MB/s)(27.7GiB/60426msec)
    clat (nsec): min=1600, max=11400k, avg=3280.67, stdev=19941.58
     lat (nsec): min=1640, max=11400k, avg=3344.89, stdev=20100.67
    clat percentiles (nsec):
     |  1.00th=[  1960],  5.00th=[  2128], 10.00th=[  2192], 20.00th=[  2320],
     | 30.00th=[  2416], 40.00th=[  2480], 50.00th=[  2576], 60.00th=[  2672],
     | 70.00th=[  2800], 80.00th=[  2960], 90.00th=[  3312], 95.00th=[  4768],
     | 99.00th=[ 12096], 99.50th=[ 14528], 99.90th=[ 40192], 99.95th=[197632],
     | 99.99th=[774144]
   bw (  KiB/s): min=59088, max=800512, per=25.53%, avg=484137.36, stdev=140320.61, samples=119
   iops        : min=14772, max=200128, avg=121034.26, stdev=35080.18, samples=119
  lat (usec)   : 2=1.35%, 4=92.31%, 10=4.83%, 20=1.27%, 50=0.15%
  lat (usec)   : 100=0.02%, 250=0.02%, 500=0.01%, 750=0.02%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%
  cpu          : usr=6.35%, sys=61.81%, ctx=8409, majf=0, minf=9
  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=0,7263211,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0.00ns, window=0.00ns, percentile=100.00%, depth=4
random-write: (groupid=0, jobs=1): err= 0: pid=1184: Tue Sep  1 03:48:45 2026
  write: IOPS=117k, BW=459MiB/s (481MB/s)(27.1GiB/60413msec)
    clat (nsec): min=1600, max=7482.8k, avg=3177.09, stdev=16334.99
     lat (nsec): min=1640, max=7482.9k, avg=3238.59, stdev=16427.00
    clat percentiles (nsec):
     |  1.00th=[  1960],  5.00th=[  2128], 10.00th=[  2192], 20.00th=[  2320],
     | 30.00th=[  2416], 40.00th=[  2480], 50.00th=[  2608], 60.00th=[  2672],
     | 70.00th=[  2800], 80.00th=[  2960], 90.00th=[  3312], 95.00th=[  4704],
     | 99.00th=[ 11840], 99.50th=[ 14144], 99.90th=[ 36096], 99.95th=[112128],
     | 99.99th=[724992]
   bw (  KiB/s): min=155104, max=808768, per=24.93%, avg=472664.58, stdev=133726.25, samples=119
   iops        : min=38776, max=202192, avg=118166.05, stdev=33431.49, samples=119
  lat (usec)   : 2=1.31%, 4=92.37%, 10=4.91%, 20=1.18%, 50=0.15%
  lat (usec)   : 100=0.02%, 250=0.02%, 500=0.01%, 750=0.02%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%
  cpu          : usr=6.02%, sys=58.09%, ctx=4939, majf=0, minf=8
  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=0,7096956,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0.00ns, window=0.00ns, percentile=100.00%, depth=4
random-write: (groupid=0, jobs=1): err= 0: pid=1185: Tue Sep  1 03:48:45 2026
  write: IOPS=115k, BW=451MiB/s (473MB/s)(26.5GiB/60195msec)
    clat (nsec): min=1600, max=7634.8k, avg=3251.83, stdev=16788.14
     lat (nsec): min=1640, max=7634.8k, avg=3315.19, stdev=16883.82
    clat percentiles (nsec):
     |  1.00th=[  1960],  5.00th=[  2128], 10.00th=[  2192], 20.00th=[  2320],
     | 30.00th=[  2416], 40.00th=[  2480], 50.00th=[  2608], 60.00th=[  2672],
     | 70.00th=[  2800], 80.00th=[  2960], 90.00th=[  3312], 95.00th=[  4704],
     | 99.00th=[ 12224], 99.50th=[ 14912], 99.90th=[ 46336], 99.95th=[177152],
     | 99.99th=[733184]
   bw (  KiB/s): min=127833, max=776856, per=24.40%, avg=462657.01, stdev=120293.93, samples=120
   iops        : min=31958, max=194214, avg=115664.17, stdev=30073.50, samples=120
  lat (usec)   : 2=1.34%, 4=92.40%, 10=4.75%, 20=1.26%, 50=0.16%
  lat (usec)   : 100=0.03%, 250=0.02%, 500=0.01%, 750=0.02%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%
  cpu          : usr=5.78%, sys=59.27%, ctx=4892, majf=0, minf=7
  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=0,6946817,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0.00ns, window=0.00ns, percentile=100.00%, depth=4

Run status group 0 (all jobs):
  WRITE: bw=1852MiB/s (1942MB/s), 451MiB/s-475MiB/s (473MB/s-498MB/s), io=109GiB (117GB), run=60195-60426msec

Disk stats (read/write):
  vdb: ios=5/287102, sectors=408/228735384, merge=0/725, ticks=2/3242554, in_queue=3242556, util=84.46%
