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comparison paper/file/benchmark/README.md @ 34:bcf20ce5201e

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add benchmarks
author Ken Miyahira <e175733@ie.u-ryukyu.ac.jp>
date Sun, 07 Feb 2021 19:49:56 +0900
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33:44a8408a59a6 34:bcf20ce5201e
1 # Benchmark
2
3 ## dd-benchmark
4
5 書き込み, 読み込みの測定には[dd-benchmark](https://romanrm.net/dd-benchmark)を使用する。最近では[fio](https://github.com/axboe/fio)がお勧め。
6
7 * 下記のコマンドで測定を行う。
8 ```sh
9 # 書き込み
10 dd if=/dev/zero of=benchmark bs=64K count=64K conv=fdatasync
11
12 # 読み込み
13 dd if=benchmark of=/dev/null
14 ```
15
16 * `conv=fdatasync`が最も普段の動作に近いらしい。
17 >This tells dd to require a complete “sync” once, right before it exits. So it commits the whole 256 MB of data, then tells the operating system: “OK, now ensure this is completely on disk”, only then measures the total time it took to do all that and calculates the benchmark result.
18
19 ### 測定用のshell
20
21 ベンチでは, 128MB, 256MB, 512MB, 1GB, 2GB, 4GBの書き込み, 読み込み速度を測定する。測定用のshellは下のやつを利用する。
22
23 ```sh
24 #!/bin/sh
25
26 for c in 2 4 8 16 32 64
27 do
28 echo "Write"
29 dd if=/dev/zero of=benchmark bs=64K count=$c"K" conv=fdatasync
30
31 echo "Read"
32 dd if=benchmark of=/dev/null
33
34 rm benchmark
35 done
36 ```