SSDのスペック調査 -fioを用いた測定-
年末ごろにSSDのスペック調査をした時のことのメモ
・fioとは
ディスクの負荷をシミュレーションしてreadやwriteの速度など負荷を与えながらスペックを計測するもの
SSDの導入検査をするときに使用した
・環境
CentOS 6.10
・インストール準備
yum install epel-release
yum install fio
・使い方
並列で実行するようであれば設定をファイルに記述して実行する
単一であればfioの後ろにオプションをつけて実行するだけで良い
例1) fio --name=random-writers --ioengine=libaio --iodepth=4 --rw=randwrite --bs=32k --direct=0 --size=64m --numjobs=4
例2)
測定設定テンプレ
-read-
[root@000 ~]# cat bench_read.job
[global]
ioengine=libaio
direct=1
invalidate=1
group_reporting
directory=/home
filename=test.bin
runtime=60
[Rand Read 4k]
readwrite=randread
size=4G
bs=4k
iodepth=32
numjobs=1
-write-
[root@000 ~]# cat bench_write.job
[global]
ioengine=libaio
direct=1
invalidate=1
group_reporting
directory=/home
filename=test.bin
runtime=60
[randwrite-4KB]
readwrite=randwrite
size=4G
bs=4k
iodepth=32
numjobs=1
・出力結果
-read-
[root@000 ~]# cat bench_read.job
[global]
ioengine=libaio
direct=1
invalidate=1
group_reporting
directory=/home
filename=test.bin
runtime=60
[Rand Read 4k]
readwrite=randread
size=4G
bs=4k
iodepth=32
numjobs=1
-write-
[root@000 ~]# cat bench_write.job
[global]
ioengine=libaio
direct=1
invalidate=1
group_reporting
directory=/home
filename=test.bin
runtime=60
[randwrite-4KB]
readwrite=randwrite
size=4G
bs=4k
iodepth=32
numjobs=1
・出力結果
読み込み
[root@000 ~]# fio bench_read.job
Rand Read 4k: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
fio-2.0.13
Starting 1 process
Rand Read 4k: Laying out IO file(s) (1 file(s) / 4096MB)
Jobs: 1 (f=1): [r] [100.0% done] [606.8M/0K/0K /s] [155K/0 /0 iops] [eta 00m:00s]
Rand Read 4k: (groupid=0, jobs=1): err= 0: pid=15338: Thu Nov 29 11:50:55 2018
read : io=4096.0MB, bw=622577KB/s, iops=155644 , runt= 6737msec
slat (usec): min=2 , max=272 , avg= 5.41, stdev= 1.78
clat (usec): min=36 , max=2118 , avg=199.77, stdev=35.58
lat (usec): min=40 , max=2120 , avg=205.22, stdev=36.26
clat percentiles (usec):
| 1.00th=[ 177], 5.00th=[ 183], 10.00th=[ 185], 20.00th=[ 187],
| 30.00th=[ 189], 40.00th=[ 191], 50.00th=[ 193], 60.00th=[ 195],
| 70.00th=[ 197], 80.00th=[ 199], 90.00th=[ 205], 95.00th=[ 241],
| 99.00th=[ 346], 99.50th=[ 350], 99.90th=[ 362], 99.95th=[ 426],
| 99.99th=[ 1288]
bw (KB/s) : min=422232, max=649512, per=99.83%, avg=621545.85, stdev=66515.11
lat (usec) : 50=0.01%, 100=0.01%, 250=95.46%, 500=4.51%, 750=0.02%
lat (msec) : 2=0.01%, 4=0.01%
cpu : usr=13.42%, sys=85.58%, ctx=24271, majf=0, minf=54
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=1048576/w=0/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=4096.0MB, aggrb=622577KB/s, minb=622577KB/s, maxb=622577KB/s, mint=6737msec, maxt=6737msec
Disk stats (read/write):
md2: ios=1022594/17, merge=0/0, ticks=0/0, in_queue=0, util=0.00%, aggrios=524288/11, aggrmerge=0/11, aggrticks=16196/7, aggrin_queue=16137, aggrutil=97.91%
sda: ios=493250/11, merge=0/11, ticks=14686/7, in_queue=14642, util=97.09%
sdb: ios=555326/11, merge=0/11, ticks=17707/8, in_queue=17633, util=97.91%
・書き込み
[root@000 ~]# fio bench_write.job
randwrite-4KB: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
fio-2.0.13
Starting 1 process
Jobs: 1 (f=1): [w] [100.0% done] [0K/274.2M/0K /s] [0 /70.2K/0 iops] [eta 00m:00s]
randwrite-4KB: (groupid=0, jobs=1): err= 0: pid=15346: Thu Nov 29 11:53:34 2018
write: io=4096.0MB, bw=262817KB/s, iops=65704 , runt= 15959msec
slat (usec): min=2 , max=835 , avg=11.02, stdev= 9.74
clat (usec): min=77 , max=65027 , avg=474.57, stdev=947.59
lat (usec): min=96 , max=65032 , avg=485.79, stdev=947.52
clat percentiles (usec):
| 1.00th=[ 326], 5.00th=[ 374], 10.00th=[ 394], 20.00th=[ 414],
| 30.00th=[ 426], 40.00th=[ 438], 50.00th=[ 446], 60.00th=[ 458],
| 70.00th=[ 470], 80.00th=[ 482], 90.00th=[ 498], 95.00th=[ 516],
| 99.00th=[ 588], 99.50th=[ 804], 99.90th=[ 3792], 99.95th=[19840],
| 99.99th=[43264]
bw (KB/s) : min=222920, max=288520, per=99.88%, avg=262495.74, stdev=19832.98
lat (usec) : 100=0.01%, 250=0.22%, 500=90.16%, 750=9.06%, 1000=0.15%
lat (msec) : 2=0.23%, 4=0.09%, 10=0.02%, 20=0.03%, 50=0.03%
lat (msec) : 100=0.01%
cpu : usr=8.05%, sys=85.70%, ctx=4495, majf=0, minf=23
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=1048576/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
WRITE: io=4096.0MB, aggrb=262817KB/s, minb=262817KB/s, maxb=262817KB/s, mint=15959msec, maxt=15959msec
Disk stats (read/write):
md2: ios=0/1044661, merge=0/0, ticks=0/0, in_queue=0, util=0.00%, aggrios=0/1048553, aggrmerge=0/49, aggrticks=0/107397, aggrin_queue=107396, aggrutil=97.47%
sda: ios=0/1048530, merge=0/73, ticks=0/106441, in_queue=106439, util=95.37%
sdb: ios=0/1048577, merge=0/26, ticks=0/108354, in_queue=108353, util=97.47%
[root@000 ~]# fio bench_read.job
Rand Read 4k: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
fio-2.0.13
Starting 1 process
Rand Read 4k: Laying out IO file(s) (1 file(s) / 4096MB)
Jobs: 1 (f=1): [r] [100.0% done] [606.8M/0K/0K /s] [155K/0 /0 iops] [eta 00m:00s]
Rand Read 4k: (groupid=0, jobs=1): err= 0: pid=15338: Thu Nov 29 11:50:55 2018
read : io=4096.0MB, bw=622577KB/s, iops=155644 , runt= 6737msec
slat (usec): min=2 , max=272 , avg= 5.41, stdev= 1.78
clat (usec): min=36 , max=2118 , avg=199.77, stdev=35.58
lat (usec): min=40 , max=2120 , avg=205.22, stdev=36.26
clat percentiles (usec):
| 1.00th=[ 177], 5.00th=[ 183], 10.00th=[ 185], 20.00th=[ 187],
| 30.00th=[ 189], 40.00th=[ 191], 50.00th=[ 193], 60.00th=[ 195],
| 70.00th=[ 197], 80.00th=[ 199], 90.00th=[ 205], 95.00th=[ 241],
| 99.00th=[ 346], 99.50th=[ 350], 99.90th=[ 362], 99.95th=[ 426],
| 99.99th=[ 1288]
bw (KB/s) : min=422232, max=649512, per=99.83%, avg=621545.85, stdev=66515.11
lat (usec) : 50=0.01%, 100=0.01%, 250=95.46%, 500=4.51%, 750=0.02%
lat (msec) : 2=0.01%, 4=0.01%
cpu : usr=13.42%, sys=85.58%, ctx=24271, majf=0, minf=54
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=1048576/w=0/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
READ: io=4096.0MB, aggrb=622577KB/s, minb=622577KB/s, maxb=622577KB/s, mint=6737msec, maxt=6737msec
Disk stats (read/write):
md2: ios=1022594/17, merge=0/0, ticks=0/0, in_queue=0, util=0.00%, aggrios=524288/11, aggrmerge=0/11, aggrticks=16196/7, aggrin_queue=16137, aggrutil=97.91%
sda: ios=493250/11, merge=0/11, ticks=14686/7, in_queue=14642, util=97.09%
sdb: ios=555326/11, merge=0/11, ticks=17707/8, in_queue=17633, util=97.91%
・書き込み
[root@000 ~]# fio bench_write.job
randwrite-4KB: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
fio-2.0.13
Starting 1 process
Jobs: 1 (f=1): [w] [100.0% done] [0K/274.2M/0K /s] [0 /70.2K/0 iops] [eta 00m:00s]
randwrite-4KB: (groupid=0, jobs=1): err= 0: pid=15346: Thu Nov 29 11:53:34 2018
write: io=4096.0MB, bw=262817KB/s, iops=65704 , runt= 15959msec
slat (usec): min=2 , max=835 , avg=11.02, stdev= 9.74
clat (usec): min=77 , max=65027 , avg=474.57, stdev=947.59
lat (usec): min=96 , max=65032 , avg=485.79, stdev=947.52
clat percentiles (usec):
| 1.00th=[ 326], 5.00th=[ 374], 10.00th=[ 394], 20.00th=[ 414],
| 30.00th=[ 426], 40.00th=[ 438], 50.00th=[ 446], 60.00th=[ 458],
| 70.00th=[ 470], 80.00th=[ 482], 90.00th=[ 498], 95.00th=[ 516],
| 99.00th=[ 588], 99.50th=[ 804], 99.90th=[ 3792], 99.95th=[19840],
| 99.99th=[43264]
bw (KB/s) : min=222920, max=288520, per=99.88%, avg=262495.74, stdev=19832.98
lat (usec) : 100=0.01%, 250=0.22%, 500=90.16%, 750=9.06%, 1000=0.15%
lat (msec) : 2=0.23%, 4=0.09%, 10=0.02%, 20=0.03%, 50=0.03%
lat (msec) : 100=0.01%
cpu : usr=8.05%, sys=85.70%, ctx=4495, majf=0, minf=23
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=1048576/d=0, short=r=0/w=0/d=0
Run status group 0 (all jobs):
WRITE: io=4096.0MB, aggrb=262817KB/s, minb=262817KB/s, maxb=262817KB/s, mint=15959msec, maxt=15959msec
Disk stats (read/write):
md2: ios=0/1044661, merge=0/0, ticks=0/0, in_queue=0, util=0.00%, aggrios=0/1048553, aggrmerge=0/49, aggrticks=0/107397, aggrin_queue=107396, aggrutil=97.47%
sda: ios=0/1048530, merge=0/73, ticks=0/106441, in_queue=106439, util=95.37%
sdb: ios=0/1048577, merge=0/26, ticks=0/108354, in_queue=108353, util=97.47%
