1
1

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 5 years have passed since last update.

10K SAS RAID5と7.2k SATA RAID1 x4を比べる その2

Posted at

前回
https://qiita.com/tsurun/items/7680c574ba4486b8780f

前回の続きです。

意図的にキャッシュミスを増やすため、テストサイズを32GBにしてDataCoreのキャッシュサイズ20GBを上回る大きさにして試してみた。

##SAS RAID5 32GB 1回
image.png

Sequential Read (Q= 32,T= 1) : 205.407 MB/s
Sequential Write (Q= 32,T= 1) : 2529.667 MB/s
Random Read 4KiB (Q= 8,T= 8) : 36.274 MB/s [ 8856.0 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 391.043 MB/s [ 95469.5 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 65.623 MB/s [ 16021.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 141.713 MB/s [ 34597.9 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 67.559 MB/s [ 16493.9 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 29.484 MB/s [ 7198.2 IOPS]

Test : 32768 MiB [H: 2.3% (0.8/35.0 GiB)] (x1) [Interval=5 sec]

##SATA RAID1 32GB 1回
image.png

Sequential Read (Q= 32,T= 1) : 118.054 MB/s
Sequential Write (Q= 32,T= 1) : 2271.629 MB/s
Random Read 4KiB (Q= 8,T= 8) : 4.300 MB/s [ 1049.8 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 419.732 MB/s [ 102473.6 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 5.787 MB/s [ 1412.8 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 192.944 MB/s [ 47105.5 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 7.722 MB/s [ 1885.3 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 47.188 MB/s [ 11520.5 IOPS]

Test : 32768 MiB [G: 2.3% (0.8/35.0 GiB)] (x1) [Interval=5 sec]

#ライトスルーにして、インターバルも60秒にして、GUIからバックエンドへのIOが無くなったことを確認してからやってみることにした。
##SAS RAID5
image.png

Sequential Read (Q= 32,T= 1) : 1061.049 MB/s
Sequential Write (Q= 32,T= 1) : 869.983 MB/s
Random Read 4KiB (Q= 8,T= 8) : 57.141 MB/s [ 13950.4 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 47.587 MB/s [ 11617.9 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 64.960 MB/s [ 15859.4 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 43.677 MB/s [ 10663.3 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 67.027 MB/s [ 16364.0 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 35.346 MB/s [ 8629.4 IOPS]

Test : 32768 MiB [H: 2.3% (0.8/35.0 GiB)] (x1) [Interval=60 sec]

##SATA RAID1
image.png

Sequential Read (Q= 32,T= 1) : 240.465 MB/s
Sequential Write (Q= 32,T= 1) : 369.747 MB/s
Random Read 4KiB (Q= 8,T= 8) : 14.551 MB/s [ 3552.5 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 27.487 MB/s [ 6710.7 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 19.420 MB/s [ 4741.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 31.779 MB/s [ 7758.5 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 20.383 MB/s [ 4976.3 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 35.053 MB/s [ 8557.9 IOPS]

Test : 32768 MiB [G: 2.3% (0.8/35.0 GiB)] (x1) [Interval=60 sec]

前回の結果と合わせて見てみると、キャッシュヒット率が落ちてくるとやっぱりSAS RAID5の方が早いみたいだけど、致命的な差ではなさそう。むしろメモリさえたくさん積んでおけばSATAでも構わないからRAID1複数個を束ねる方がよさそう。

1
1
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
1
1

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?