io --ioengine=libaio --direct=1 --sync=1 --rw=write --bs=4K --numjobs=1 --iodepth=32 --runtime=60 --time_based --name seq_read --file
name=/ZFS-NVMe/vm-200-disk-1 --size=8M
seq_read: (g=0): rw=write, 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=25.8MiB/s][w=6602 IOPS][eta 00m:00s]
seq_read: (groupid=0, jobs=1): err= 0: pid=231302: Sat Mar 7 11:22:48 2026
write: IOPS=6386, BW=24.9MiB/s (26.2MB/s)(1497MiB/60001msec); 0 zone resets
slat (usec): min=85, max=56149, avg=154.13, stdev=269.24
clat (usec): min=4, max=77244, avg=4855.15, stdev=1692.95
lat (usec): min=158, max=77412, avg=5009.28, stdev=1721.93
clat percentiles (usec):
| 1.00th=[ 4424], 5.00th=[ 4555], 10.00th=[ 4555], 20.00th=[ 4621],
| 30.00th=[ 4686], 40.00th=[ 4686], 50.00th=[ 4752], 60.00th=[ 4752],
| 70.00th=[ 4817], 80.00th=[ 4883], 90.00th=[ 5145], 95.00th=[ 5407],
| 99.00th=[ 6194], 99.50th=[ 6587], 99.90th=[13566], 99.95th=[58983],
| 99.99th=[62653]
bw ( KiB/s): min=21928, max=27072, per=100.00%, avg=25552.27, stdev=1005.93, samples=119
iops : min= 5482, max= 6768, avg=6388.07, stdev=251.48, samples=119
lat (usec) : 10=0.01%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
lat (msec) : 2=0.01%, 4=0.14%, 10=99.72%, 20=0.04%, 50=0.02%
lat (msec) : 100=0.08%
cpu : usr=1.64%, sys=24.90%, ctx=383209, majf=0, minf=12
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=0,383188,0,0 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=24.9MiB/s (26.2MB/s), 24.9MiB/s-24.9MiB/s (26.2MB/s-26.2MB/s), io=1497MiB (1570MB), run=60001-60001msec