siege

siege官网
源码地址
核心是以用户为单位进行模拟
Siege是一款开源的压力测试工具
Siege设计用于评估WEB应用在压力下的承受能力
siege可以从您选择的预置列表中请求随机的URL:所以siege可用于仿真用户请求负载,而ab则不能
不要使用siege来执行最高性能基准调校测试,这方面ab就准确很多
目前主流包管理都提供在线安装
```
apt install -y siege
```

0x1 参数

这里先截取一份帮助文本

root@docker:~# siege --help
New configuration template added to /root/.siege
Run siege -C to view the current settings in that file
SIEGE 4.0.4
Usage: siege [options]
       siege [options] URL
       siege -g URL
Options:
  -V, --version             VERSION, prints the version number.
  -h, --help                HELP, prints this section.
  -C, --config              CONFIGURATION, show the current config.
  -v, --verbose             VERBOSE, prints notification to screen.
  -q, --quiet               QUIET turns verbose off and suppresses output.
  -g, --get                 GET, pull down HTTP headers and display the
                            transaction. Great for application debugging.
  -p, --print               PRINT, like GET only it prints the entire page.
  -c, --concurrent=NUM      CONCURRENT users, default is 10
  -r, --reps=NUM            REPS, number of times to run the test.
  -t, --time=NUMm           TIMED testing where "m" is modifier S, M, or H
                            ex: --time=1H, one hour test.
  -d, --delay=NUM           Time DELAY, random delay before each requst
  -b, --benchmark           BENCHMARK: no delays between requests.
  -i, --internet            INTERNET user simulation, hits URLs randomly.
  -f, --file=FILE           FILE, select a specific URLS FILE.
  -R, --rc=FILE             RC, specify an siegerc file
  -l, --log[=FILE]          LOG to FILE. If FILE is not specified, the
                            default is used: /var/log/siege.log
  -m, --mark="text"         MARK, mark the log file with a string.
                            between .001 and NUM. (NOT COUNTED IN STATS)
  -H, --header="text"       Add a header to request (can be many)
  -A, --user-agent="text"   Sets User-Agent in request
  -T, --content-type="text" Sets Content-Type in request
      --no-parser           NO PARSER, turn off the HTML page parser
      --no-follow           NO FOLLOW, do not follow HTTP redirects

Copyright (C) 2017 by Jeffrey Fulmer, et al.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE.

核心参数如下:
1. -c:模拟几个用户
2. -r:重复测试几次
3. -t:设定持续测试多久与-r冲突,单位:-t3600S, -t60M, -t1H.
4. -d:设置每个请求之间的延时,默认0.5s
5. -f:给定一个文件,文件中存放需要测试的url
6. -g:打印出请求的header信息,debug专用
7. -H:指定请求的headers信息
8. -l:指定测试结果的路径

0x2 使用案例

模拟50个用户对urlhttp://10.25.153.231/进行100次测试
```
siege -c 50 -r 100 http://10.25.153.231/
```

输出结果如下

root@docker:~# siege -c 50 -r 100 http://10.25.153.231/
** SIEGE 4.0.4
** Preparing 50 concurrent users for battle.
The server is now under siege...
Transactions:                  35000 hits
Availability:                 100.00 %
Elapsed time:                  17.50 secs
Data transferred:             510.51 MB
Response time:                  0.02 secs
Transaction rate:            2000.00 trans/sec
Throughput:                    29.17 MB/sec
Concurrency:                   49.60
Successful transactions:       35000
Failed transactions:               0
Longest transaction:            0.24
Shortest transaction:           0.00

核心参数如下
1. Transactions:传输总数
2. Availability:服务达成比例
3. Elapsed time:总耗时
4. Data transferred:数据传输总量
5. Response time:响应时间
6. Transaction rate:传输速率
7. Throughput:每秒传输的数据量
8. Concurrency:最高并发
9. Successful transactions:成功传输总数
10. Failed transactions:失败的传输
11. Longest transaction:最长的一次传输时间
12. Shortest transaction:最短的一次传输时间

siege web仿真压力测试