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Random writeRandom Read
RAIDZ1 (LZ)

82.5MiB/s-82.5MiB/s99.2MiB/s-99.2MiB/s 











Tech details

root@truenas:/mnt/pool/shared/user# sync;fio --randrepeat=1 --ioengine=libaio --direct=1 --name=test --filename=test --bs=4k --size=4G --readwrite=randwrite --ramp_time=4
test: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.33
Starting 1 process
test: Laying out IO file (1 file / 4096MiB)
Jobs: 1 (f=0): [f(1)][100.0%][w=147MiB/s][w=37.6k IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=41307: Thu Apr 10 12:49:43 2025
  write: IOPS=21.1k, BW=82.5MiB/s (86.5MB/s)(3672MiB/44503msec); 0 zone resets
    slat (usec): min=4, max=80062, avg=45.37, stdev=167.42
    clat (nsec): min=614, max=4072.6k, avg=1133.86, stdev=6985.89
     lat (usec): min=5, max=80072, avg=46.50, stdev=167.70
    clat percentiles (nsec):
     |  1.00th=[  740],  5.00th=[  836], 10.00th=[  884], 20.00th=[  924],
     | 30.00th=[  956], 40.00th=[  972], 50.00th=[  996], 60.00th=[ 1020],
     | 70.00th=[ 1048], 80.00th=[ 1080], 90.00th=[ 1192], 95.00th=[ 1384],
     | 99.00th=[ 2008], 99.50th=[ 3312], 99.90th=[24704], 99.95th=[41728],
     | 99.99th=[72192]
   bw (  KiB/s): min=48766, max=137119, per=98.81%, avg=83487.14, stdev=11581.15, samples=87
   iops        : min=12191, max=34279, avg=20872.08, stdev=2895.09, samples=87
  lat (nsec)   : 750=1.20%, 1000=50.42%
  lat (usec)   : 2=47.36%, 4=0.59%, 10=0.14%, 20=0.16%, 50=0.10%
  lat (usec)   : 100=0.02%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
  lat (msec)   : 2=0.01%, 4=0.01%, 10=0.01%
  cpu          : usr=3.69%, sys=85.07%, ctx=107206, majf=0, minf=37
  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=0,940003,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
  WRITE: bw=82.5MiB/s (86.5MB/s), 82.5MiB/s-82.5MiB/s (86.5MB/s-86.5MB/s), io=3672MiB (3850MB), run=44503-44503msec


root@truenas:/mnt/pool/shared/user# sync;fio --randrepeat=1 --ioengine=libaio --direct=1 --name=test --filename=test --bs=4k --size=4G --readwrite=randread --ramp_time=4
test: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.33
Starting 1 process
Jobs: 1 (f=1): [r(1)][91.3%][r=160MiB/s][r=41.0k IOPS][eta 00m:04s]
test: (groupid=0, jobs=1): err= 0: pid=41962: Thu Apr 10 12:50:58 2025
  read: IOPS=25.4k, BW=99.2MiB/s (104MB/s)(3708MiB/37391msec)
    slat (usec): min=2, max=467, avg=38.12, stdev=11.50
    clat (nsec): min=587, max=54938, avg=738.69, stdev=251.78
     lat (usec): min=3, max=470, avg=38.86, stdev=11.53
    clat percentiles (nsec):
     |  1.00th=[  636],  5.00th=[  668], 10.00th=[  684], 20.00th=[  692],
     | 30.00th=[  700], 40.00th=[  708], 50.00th=[  716], 60.00th=[  724],
     | 70.00th=[  740], 80.00th=[  756], 90.00th=[  804], 95.00th=[  876],
     | 99.00th=[ 1012], 99.50th=[ 1096], 99.90th=[ 2416], 99.95th=[ 3056],
     | 99.99th=[14144]
   bw (  KiB/s): min=91048, max=157648, per=98.65%, avg=100191.19, stdev=8691.21, samples=74
   iops        : min=22762, max=39412, avg=25047.76, stdev=2172.79, samples=74
  lat (nsec)   : 750=76.93%, 1000=21.93%
  lat (usec)   : 2=1.03%, 4=0.08%, 10=0.01%, 20=0.01%, 50=0.01%
  lat (usec)   : 100=0.01%
  cpu          : usr=2.95%, sys=96.97%, ctx=420, majf=0, minf=37
  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=949364,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=99.2MiB/s (104MB/s), 99.2MiB/s-99.2MiB/s (104MB/s-104MB/s), io=3708MiB (3889MB), run=37391-37391msec


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