用ab对apache负载均衡集群的性能测试对比报告

apache服务器自带有一个叫AB(ApacheBench)的工具，在bin目录下使用这个工具可以对服务器进行负载测试。

用法：

ab -n 全部请求数 -c 并发数 测试url

Concurrency Level: 50 #并发数

Time taken for tests: 92.76140 seconds #全部请求完成耗时

Complete requests: 10000 #全部请求数

Failed requests: 1974 #失败的请求 (Connect: 0, Length: 1974, Exceptions: 0)

Write errors: 0

Total transferred: 827019400 bytes #总传输大小

HTML transferred: 825219400 bytes

Requests per second: 108.61 [#/sec] (mean) #每秒请求数(平均)

Time per request: 460.381 [ms] (mean) #每次并发请求时间(所有并发)

Time per request: 9.208 [ms] (mean, across all concurrent requests) #每一请求时间(并发平均)

Transfer rate: 8771.39 [Kbytes/sec] received #传输速率

以下结果时间每次有所偏差，均取相对平均值。

下面是我的从机ubuntu环境下的测试结果，在主机CentOS那台机器上 测试时候性能差比较明显。但最好还是能有第三台外部机器来测。

单台主服务器测试情况：

ab -n 1000 -c 100 http://www.linuxplay.cn/test
Concurrency Level: 100

Time taken for tests: 0.573741 seconds

Complete requests: 1000

Failed requests: 0

Write errors: 0

Total transferred: 276925 bytes

HTML transferred: 14098 bytes

Requests per second: 1742.95 [#/sec] (mean)

Time per request: 57.374 [ms] (mean)

Time per request: 0.574 [ms] (mean, across all concurrent requests)

Transfer rate: 470.60 [Kbytes/sec] received

双机模式：

ab -n 1000 -c 100 http://www.linuxplay.cn/test
Concurrency Level: 100

Time taken for tests: 0.621410 seconds

Complete requests: 1000

Failed requests: 0

Write errors: 0

Total transferred: 279375 bytes

HTML transferred: 14070 bytes

Requests per second: 1609.24 [#/sec] (mean)

Time per request: 62.141 [ms] (mean)

Time per request: 0.621 [ms] (mean, across all concurrent requests)

Transfer rate: 437.71 [Kbytes/sec] received

ab -n 5000 -c 200 http://www.linuxplay.cn/test
单机模式：用到此并发数时候数据的变化波动很大10－3秒內完成都有

Concurrency Level: 200

Time taken for tests: 10.5496 seconds

Complete requests: 5000

Failed requests: 0

Write errors: 0

Total transferred: 1375000 bytes

HTML transferred: 70000 bytes

Requests per second: 499.73 [#/sec] (mean)

Time per request: 400.220 [ms] (mean)

Time per request: 2.001 [ms] (mean, across all concurrent requests)

Transfer rate: 134.13 [Kbytes/sec] received双机模式：稳定Concurrency Level: 200

Time taken for tests: 2.408902 seconds

Complete requests: 5000

Failed requests: 0

Write errors: 0

Total transferred: 1391112 bytes

HTML transferred: 70056 bytes

Requests per second: 2075.63 [#/sec] (mean)

Time per request: 96.356 [ms] (mean)

Time per request: 0.482 [ms] (mean, across all concurrent requests)

Transfer rate: 563.74 [Kbytes/sec] received

单台主服务器测试情况：开始响应超负荷

ab -n 3000 -c 500 http://www.linuxplay.cn/test
apr_poll: The timeout specified has expired (70007)

Total of 4761 requests completed双机模式：正常

ab -n 3000 -c 500 http://www.linuxplay.cn/test
Concurrency Level: 500

Time taken for tests: 3.480663 seconds

Complete requests: 3000

Failed requests: 0

Write errors: 0

Total transferred: 834323 bytes

HTML transferred: 42014 bytes

Requests per second: 861.90 [#/sec] (mean)

Time per request: 580.111 [ms] (mean)

Time per request: 1.160 [ms] (mean, across all concurrent requests)

Transfer rate: 233.86 [Kbytes/sec] receivedab -n 5000 -c 500 http://www.linuxplay.cn/test ／／所用响应时间波动稍大

Concurrency Level: 500

Time taken for tests: 6.739712 seconds

Complete requests: 5000

Failed requests: 0

Write errors: 0

Total transferred: 1390137 bytes

HTML transferred: 70014 bytes

Requests per second: 741.87 [#/sec] (mean)

Time per request: 673.971 [ms] (mean)

Time per request: 1.348 [ms] (mean, across all concurrent requests)

Transfer rate: 201.34 [Kbytes/sec] received

ab -n 5000 -c 800 http://www.linuxplay.cn/test
Concurrency Level: 800

Time taken for tests: 18.589927 seconds

Complete requests: 5000

Failed requests: 0

Write errors: 0

Total transferred: 1391184 bytes

HTML transferred: 70056 bytes

Requests per second: 268.96 [#/sec] (mean)

Time per request: 2974.388 [ms] (mean)

Time per request: 3.718 [ms] (mean, across all concurrent requests)

Transfer rate: 73.05 [Kbytes/sec] received

ab -n 5000 -c 1000 http://www.linuxplay.cn/test
Concurrency Level: 1000

Time taken for tests: 23.19091 seconds

Complete requests: 5000

Failed requests: 1

(Connect: 0, Length: 1, Exceptions: 0)

Write errors: 0

Non-2xx responses: 1

Total transferred: 1390169 bytes

HTML transferred: 70448 bytes

Requests per second: 217.21 [#/sec] (mean)

Time per request: 4603.818 [ms] (mean)

Time per request: 4.604 [ms] (mean, across all concurrent requests)

Transfer rate: 58.95 [Kbytes/sec] received

小结：测试也是一们大课题，而ab是专门性针对apache的负载进行测试的其中一款软件在linux 下还有许多开源的好软件如：Siege、bombardment等，windows下的就更不用说拉,man慢慢来继续努力：）

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