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SSD, HDD, 또는 Cloud Infra에서 제공하는 가상 Storage의 IOPS 성능이 궁금할 때,
fio 명령을 사용하면 쉽게 IOPS 측정 결과를 얻을 수 있다.
$ sudo apt install fio
## fio 명령 옵션 설명
## --numjobs=8 8개의 쓰레드가 동시에 I/O 테스트 실행. 생성되는 파일도 8개.
## --size=1G 각 테스트용 파일의 크기
## --runtime=10 10초 동안 테스트
## 10초 동안
$ fio --directory=/home/sejong/fio --name fio_test_file \
--direct=1 --rw=randwrite --bs=4K --size=1G \
--numjobs=8 --time_based --runtime=10 \
--group_reporting --norandommap --rwmixread 30
... 중간 생략 ...
Jobs: 8 (f=8): [w(8)][100.0%][w=1924MiB/s][w=493k IOPS][eta 00m:00s]
fio_test_file: (groupid=0, jobs=8): err= 0: pid=3313523: Wed Aug 23 15:20:07 2023
write: IOPS=466k, BW=1822MiB/s (1910MB/s)(17.8GiB/10001msec); 0 zone resets
clat (usec): min=10, max=6785, avg=16.77, stdev=25.55
lat (usec): min=10, max=6786, avg=16.84, stdev=25.55
clat percentiles (usec):
| 1.00th=[ 12], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 14],
| 30.00th=[ 15], 40.00th=[ 16], 50.00th=[ 16], 60.00th=[ 17],
| 70.00th=[ 18], 80.00th=[ 19], 90.00th=[ 20], 95.00th=[ 22],
| 99.00th=[ 27], 99.50th=[ 30], 99.90th=[ 103], 99.95th=[ 120],
| 99.99th=[ 1532]
bw ( MiB/s): min= 1628, max= 1953, per=99.78%, avg=1817.71, stdev=12.47, samples=152
iops : min=416986, max=500024, avg=465333.05, stdev=3191.37, samples=152
lat (usec) : 20=90.35%, 50=9.49%, 100=0.06%, 250=0.08%, 500=0.01%
lat (usec) : 750=0.01%, 1000=0.01%
lat (msec) : 2=0.01%, 4=0.01%, 10=0.01%
cpu : usr=4.28%, sys=29.64%, ctx=4664591, majf=0, minf=115
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=0,4663934,0,0 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=1822MiB/s (1910MB/s), 1822MiB/s-1822MiB/s (1910MB/s-1910MB/s), io=17.8GiB (19.1GB), run=10001-10001msec
Disk stats (read/write):
nvme0n1: ios=0/4613003, merge=0/103199, ticks=0/55894, in_queue=56493, util=99.15%
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