fio --ioengine=libaio --direct=1 --rw=randwrite --bs=4k --numjobs=1 --iodepth=32 --runtime=60 --time_based --name=randwrite_test --fil
ename=/ZFS-NVMe/vm-200-disk-1 --size=1G
randwrite_test: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=32
fio-3.33
Starting 1 process
Jobs: 1 (f=1): [w(1)][100.0%][w=310MiB/s][w=79.4k IOPS][eta 00m:00s]
randwrite_test: (groupid=0, jobs=1): err= 0: pid=1232780: Sun Mar 8 10:13:24 2026
write: IOPS=69.1k, BW=270MiB/s (283MB/s)(15.8GiB/60001msec); 0 zone resets
slat (usec): min=3, max=20231, avg=13.53, stdev=41.85
clat (nsec): min=1865, max=29369k, avg=448951.03, stdev=641813.05
lat (usec): min=6, max=29380, avg=462.48, stdev=661.17
clat percentiles (usec):
| 1.00th=[ 155], 5.00th=[ 172], 10.00th=[ 178], 20.00th=[ 196],
| 30.00th=[ 223], 40.00th=[ 255], 50.00th=[ 306], 60.00th=[ 388],
| 70.00th=[ 486], 80.00th=[ 611], 90.00th=[ 816], 95.00th=[ 1004],
| 99.00th=[ 1450], 99.50th=[ 3097], 99.90th=[10945], 99.95th=[13960],
| 99.99th=[17171]
bw ( KiB/s): min= 7752, max=432007, per=99.89%, avg=276145.95, stdev=92822.65, samples=119
iops : min= 1938, max=108000, avg=69036.40, stdev=23205.62, samples=119
lat (usec) : 2=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=38.76%, 500=32.51%, 750=16.28%, 1000=7.39%
lat (msec) : 2=4.34%, 4=0.33%, 10=0.27%, 20=0.12%, 50=0.01%
cpu : usr=6.31%, sys=85.20%, ctx=14480, majf=0, minf=13
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued rwts: total=0,4146994,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=32
Run status group 0 (all jobs):
WRITE: bw=270MiB/s (283MB/s), 270MiB/s-270MiB/s (283MB/s-283MB/s), io=15.8GiB (17.0GB), run=60001-60001msec