I have downloaded this disk stats dashboard[1]. However if I do a fio test, the test results in fio are different than displayed in the chart. Why do I not have 198MB/s listed anywhere? Anyone doing similar tests to verify if their charts are correct?
This is the query being used:
SELECT non_negative_derivative(mean("value"), 1s) FROM "disk_write" WHERE ("type" = 'disk_octets' AND "host" =~ /^$hostname$/ AND "instance" =~ /^$disk$/) AND $timeFilter GROUP BY time($__interval), "host" fill(null)
Fri Oct 2 17:30:48 CEST 2020
write-4096k-d16-seq: (g=0): rw=write, bs=(R) 4096KiB-4096KiB, (W) 4096KiB-4096KiB, (T) 4096KiB-4096KiB, ioengine=libaio, iodepth=16
fio-3.7
Starting 1 process
write-4096k-d16-seq: (groupid=0, jobs=1): err= 0: pid=20987: Fri Oct 2 17:32:20 2020
write: IOPS=46, BW=188MiB/s (198MB/s)(11.1GiB/60202msec)
slat (usec): min=663, max=614047, avg=7952.87, stdev=43438.99
clat (msec): min=28, max=1031, avg=333.90, stdev=103.89
lat (msec): min=30, max=1057, avg=341.83, stdev=103.29
clat percentiles (msec):
| 1.00th=[ 37], 5.00th=[ 228], 10.00th=[ 255], 20.00th=[ 275],
| 30.00th=[ 292], 40.00th=[ 305], 50.00th=[ 321], 60.00th=[ 342],
| 70.00th=[ 359], 80.00th=[ 397], 90.00th=[ 443], 95.00th=[ 518],
| 99.00th=[ 651], 99.50th=[ 693], 99.90th=[ 810], 99.95th=[ 911],
| 99.99th=[ 1028]
bw ( KiB/s): min=81756, max=278528, per=100.00%, avg=194068.82, stdev=61740.11, samples=119
iops : min= 19, max= 68, avg=47.22, stdev=15.14, samples=119
lat (msec) : 50=3.72%, 100=0.04%, 250=4.79%, 500=86.34%, 750=5.29%
lat (msec) : 1000=0.32%
cpu : usr=1.86%, sys=4.04%, ctx=2518, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.3%, 16=148.2%, 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=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=0,2819,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
WRITE: bw=188MiB/s (198MB/s), 188MiB/s-188MiB/s (198MB/s-198MB/s), io=11.1GiB (11.9GB), run=60202-60202msec
Disk stats (read/write):
dm-0: ios=0/37770, merge=0/0, ticks=0/12446733, in_queue=12452735, util=99.84%, aggrios=0/37782, aggrmerge=0/0, aggrticks=0/12451022, aggrin_queue=12450777, aggrutil=99.83%
sda: ios=0/37782, merge=0/0, ticks=0/12451022, in_queue=12450777, util=99.83%
Fri Oct 2 17:32:20 CEST 2020
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