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| root@ceph-1:/mnt/rbd-demo rand_100read_4k: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=1 ... fio-3.16 Starting 50 threads rand_100read_4k: Laying out IO file (1 file / 100MiB) Jobs: 50 (f=50): [r(50)][25.5%][eta 08m:55s] rand_100read_4k: (groupid=0, jobs=50): err= 0: pid=19546: Wed Mar 1 17:46:39 2023 read: IOPS=1837, BW=7350KiB/s (7526kB/s)(1310MiB/182536msec) clat (usec): min=314, max=3642.9k, avg=27202.59, stdev=217705.72 lat (usec): min=314, max=3642.9k, avg=27203.14, stdev=217705.73 clat percentiles (usec): | 1.00th=[ 758], 5.00th=[ 963], 10.00th=[ 1106], | 20.00th=[ 1369], 30.00th=[ 1663], 40.00th=[ 2147], | 50.00th=[ 3097], 60.00th=[ 5342], 70.00th=[ 8160], | 80.00th=[ 11600], 90.00th=[ 17695], 95.00th=[ 24773], | 99.00th=[ 95945], 99.50th=[1635779], 99.90th=[3338666], | 99.95th=[3472884], 99.99th=[3640656] bw ( KiB/s): min= 350, max=42945, per=100.00%, avg=17074.17, stdev=301.72, samples=7850 iops : min= 50, max=10735, avg=4264.67, stdev=75.43, samples=7850 lat (usec) : 500=0.11%, 750=0.79%, 1000=5.25% lat (msec) : 2=31.39%, 4=17.24%, 10=21.04%, 20=16.33%, 50=6.47% lat (msec) : 100=0.38%, 2000=0.67%, >=2000=0.33% cpu : usr=0.05%, sys=0.16%, ctx=342161, majf=0, minf=49 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=335394,0,0,0 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=7350KiB/s (7526kB/s), 7350KiB/s-7350KiB/s (7526kB/s-7526kB/s), io=1310MiB (1374MB), run=182536-182536msec
Disk stats (read/write): rbd0: ios=337590/6757, merge=1/29, ticks=2274317/134222, in_queue=1793584, util=99.62% io=1310MiB bw=7350KIB/s iops=1837 runt=60001-60001msec
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