1，Siege是一个HTTP压力测试和评测工具，可以根据配置对一个web站点进行多用户的并发访问，记录每个用户所请求过程的响应的时间，并在一定数量的并发访问下重复进行。
下载：
安装：
tar -xzf *.gz
./configure
make
make install
安装后：
[root@cdntest-6 ~]# siege
SIEGE 2.74
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.
-c, –concurrent=NUM CONCURRENT users, default is 10
-i, –internet INTERNET user simulation, hits URLs randomly.
-b, –benchmark BENCHMARK: no delays between requests.
-t, –time=NUMm TIMED testing where “m” is modifier S, M, or H
ex: –time=1H, one hour test.
-r, –reps=NUM REPS, number of times to run the test.
-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: PREFIX/var/siege.log
-m, –mark=”text” MARK, mark the log file with a string.
-d, –delay=NUM Time DELAY, random delay before each requst
between 1 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
Copyright (C) 2013 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.
2，增量压力测试
为了方便增量压力测试，siege还包含了一些辅助工具：bombardment
[root@cdntest-6 ~]# bombardment
usage:
bombardment [urlfile] [inital # of clients] [inc value] [# of inc] [delay]
例子：
bombardment urlfile.txt 5 3 4 1
初始化URL列表：urlfile.txt
初始化为：5个用户
每次增加：3个用户
运行：4次
每个客户端之间的延迟为：1秒
参考地址：
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