1. fio --name=randrw --rw=randrw --direct=1 --ioengine=libaio --bs=4k --numjobs=8 --rwmixread=90 --size=1G --runtime=60 --group_reporting
2. randrw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
3. ...
4. fio-3.19
5. Starting 8 processes
6. randrw: Laying out IO file (1 file / 1024MiB)
7. randrw: Laying out IO file (1 file / 1024MiB)
8. randrw: Laying out IO file (1 file / 1024MiB)
9. randrw: Laying out IO file (1 file / 1024MiB)
10. randrw: Laying out IO file (1 file / 1024MiB)
11. randrw: Laying out IO file (1 file / 1024MiB)
12. randrw: Laying out IO file (1 file / 1024MiB)
13. randrw: Laying out IO file (1 file / 1024MiB)
14. Jobs: 3 (f=3): [m(3),_(5)][74.4%][r=55.6MiB/s,w=6337KiB/s][r=14.2k,w=1584 IOPS][eta 00m:21s]
15. randrw: (groupid=0, jobs=8): err= 0: pid=100641: Wed Apr  5 08:22:23 2023
16.   read: IOPS=29.7k, BW=116MiB/s (121MB/s)(6951MiB/60001msec)
17.     slat (nsec): min=1632, max=8376.6k, avg=3752.36, stdev=19906.14
18.     clat (usec): min=89, max=10825, avg=221.75, stdev=164.96
19.      lat (usec): min=96, max=10830, avg=225.57, stdev=166.21
20.     clat percentiles (usec):
21.      |  1.00th=[  112],  5.00th=[  120], 10.00th=[  127], 20.00th=[  139],
22.      | 30.00th=[  153], 40.00th=[  167], 50.00th=[  180], 60.00th=[  192],
23.      | 70.00th=[  210], 80.00th=[  243], 90.00th=[  433], 95.00th=[  490],
24.      | 99.00th=[  603], 99.50th=[  693], 99.90th=[ 1745], 99.95th=[ 2868],
25.      | 99.99th=[ 5407]
26.    bw (  KiB/s): min=98088, max=158160, per=100.00%, avg=127551.71, stdev=2193.20, samples=893
27.    iops        : min=24522, max=39540, avg=31887.86, stdev=548.30, samples=893
28.   write: IOPS=3301, BW=12.9MiB/s (13.5MB/s)(774MiB/60001msec); 0 zone resets
29.     slat (nsec): min=1721, max=5612.3k, avg=4984.46, stdev=22173.68
30.     clat (usec): min=131, max=8398, avg=233.30, stdev=121.08
31.      lat (usec): min=135, max=8404, avg=238.37, stdev=123.13
32.     clat percentiles (usec):
33.      |  1.00th=[  155],  5.00th=[  165], 10.00th=[  174], 20.00th=[  188],
34.      | 30.00th=[  200], 40.00th=[  212], 50.00th=[  223], 60.00th=[  235],
35.      | 70.00th=[  249], 80.00th=[  265], 90.00th=[  293], 95.00th=[  318],
36.      | 99.00th=[  392], 99.50th=[  441], 99.90th=[ 1532], 99.95th=[ 3064],
37.      | 99.99th=[ 5211]
38.    bw (  KiB/s): min= 9904, max=18704, per=100.00%, avg=14194.07, stdev=272.92, samples=893
39.    iops        : min= 2476, max= 4676, avg=3548.46, stdev=68.24, samples=893
40.   lat (usec)   : 100=0.01%, 250=79.93%, 500=16.18%, 750=3.53%, 1000=0.15%
41.   lat (msec)   : 2=0.12%, 4=0.06%, 10=0.02%, 20=0.01%
42.   cpu          : usr=0.65%, sys=1.88%, ctx=1977682, majf=0, minf=113
43.   IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
44.      submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
45.      complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
46.      issued rwts: total=1779438,198078,0,0 short=0,0,0,0 dropped=0,0,0,0
47.      latency   : target=0, window=0, percentile=100.00%, depth=1
48.  
49. Run status group 0 (all jobs):
50.    READ: bw=116MiB/s (121MB/s), 116MiB/s-116MiB/s (121MB/s-121MB/s), io=6951MiB (7289MB), run=60001-60001msec
51.   WRITE: bw=12.9MiB/s (13.5MB/s), 12.9MiB/s-12.9MiB/s (13.5MB/s-13.5MB/s), io=774MiB (811MB), run=60001-60001msec
52.  
53. Disk stats (read/write):
54.     dm-2: ios=1779313/198103, merge=0/0, ticks=392478/45634, in_queue=438112, util=99.89%, aggrios=1779607/198109, aggrmerge=0/8, aggrticks=392662/45785, aggrin_queue=438448, aggrutil=99.83%
55.   sda: ios=1779607/198109, merge=0/8, ticks=392662/45785, in_queue=438448, util=99.83%
56.  
57.  
58.  
59. [root@localhost telecor]# sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
60. 1024+0 records in
61. 1024+0 records out
62. 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.678577 s, 1.6 GB/s
63.  
64.  
65.  
66.  
67. [root@localhost telecor]# sudo hdparm -t /dev/sda1
68. /dev/sda1:
69.  Timing buffered disk reads: 1024 MB in  0.38 seconds = 2688.93 MB/sec