4月 25
メインの作業マシンのストレージをHDDからSSDに換装したところ爆速になったので、自宅サーバも同様に乾燥してみた。
簡単なベンチマーク結果。
使用した HDD と SSDはこちら。
sda : SSD – KINGSTON SSDNow V 100 SV100S2/64G
sdb : HDD – Hitachi HDS721010CLA332 (1TB SATA300 7200)
使用したコマンドとスクリプトはこちら
■ hdparm -Tt
[root@Uranus ~]# hdparm -Tt /dev/sda [root@Uranus ~]# hdparm -Tt /dev/sdb
■ Read性能
[root@Uranus ~]for i in [1] [2] [3] [4] [5];do sleep 10;echo $'\n\n' $i;hdparm -t /dev/sda1;done [root@Uranus ~]for i in [1] [2] [3] [4] [5];do sleep 10;echo $'\n\n' $i;hdparm -t /dev/sdb1;done
■ Write性能
[root@Uranus ~]# for i in [1] [2] [3] [4] [5];do sleep 10;echo $'\n\n' $i;date;time dd if=/dev/zero of=/home/hdparm_write$i.tmp ibs=1M obs=1M count=1024;date;do ne [root@Uranus ~]# for i in [1] [2] [3] [4] [5];do sleep 10;echo $'\n\n' $i;date;time dd if=/dev/zero of=/tmp/hdparm_write$i.tmp ibs=1M obs=1M count=1024;date;don
====
■ hdparm -Tt
□ SSD
/dev/sda: Timing cached reads: 2644 MB in 2.00 seconds = 1322.79 MB/sec Timing buffered disk reads: 548 MB in 3.00 seconds = 182.46 MB/sec
□ HDD
/dev/sdb: Timing cached reads: 2844 MB in 2.00 seconds = 1422.73 MB/sec Timing buffered disk reads: 404 MB in 3.01 seconds = 134.23 MB/sec
====
■ Read性能
□ SSD
Timing buffered disk reads: 100 MB in 0.68 seconds = 147.17 MB/sec Timing buffered disk reads: 100 MB in 0.93 seconds = 107.99 MB/sec Timing buffered disk reads: 100 MB in 0.93 seconds = 107.67 MB/sec Timing buffered disk reads: 100 MB in 0.85 seconds = 117.70 MB/sec Timing buffered disk reads: 100 MB in 0.97 seconds = 103.09 MB/sec
□ HDD
Timing buffered disk reads: 400 MB in 3.00 seconds = 133.27 MB/sec Timing buffered disk reads: 402 MB in 3.01 seconds = 133.76 MB/sec Timing buffered disk reads: 402 MB in 3.01 seconds = 133.64 MB/sec Timing buffered disk reads: 376 MB in 3.01 seconds = 125.12 MB/sec Timing buffered disk reads: 400 MB in 3.01 seconds = 133.53 MB/sec
====
■ Write性能
□ SSD
[1] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 5.27419 seconds, 204 MB/s real 0m12.173s user 0m0.618s sys 0m4.310s [2] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 5.47539 seconds, 196 MB/s real 0m5.477s user 0m0.538s sys 0m4.226s [3] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 5.24312 seconds, 205 MB/s real 0m5.245s user 0m0.519s sys 0m3.890s [4] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 5.42746 seconds, 198 MB/s real 0m5.429s user 0m0.536s sys 0m4.213s [5] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 6.28239 seconds, 171 MB/s real 0m6.286s user 0m0.594s sys 0m4.536s
□ HDD
[1] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 5.3799 seconds, 200 MB/s real 0m5.383s user 0m0.654s sys 0m4.607s [2] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 7.25025 seconds, 148 MB/s real 0m7.253s user 0m0.518s sys 0m3.768s [3] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 18.0487 seconds, 59.5 MB/s real 0m18.499s user 0m0.859s sys 0m6.773s [4] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 13.5566 seconds, 79.2 MB/s real 0m13.560s user 0m0.683s sys 0m5.657s [5] 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 16.9968 seconds, 63.2 MB/s real 0m17.000s user 0m0.623s sys 0m5.248s
====
なんとも微妙な結果…？まあ、安いSSDですし…。
当初の目的と違うけど静音化出来たという点では満足なのですが。
正直なところ、yum update した時は「早いなー」と感じたけれども、様々な作業をしていて「劇的に早くなったな」という程でもない。
SSD にサーバOS に置くのはあまり恩恵が無いかもですね。
将来的に mysql を SSD 上に置く予定なので、DB の I/O ボトルネックが解消されることに期待します。
関連すると思われる他の投稿
