jmeter distributed stress test

1.What is distributed stress testing?

by a controller（Master ）发出命令,Control multiple presses（Slaves）执行操作.

2、为什么要做分布式压测?

• 一台压力机的 Jmeter 默认最大支持 1000 左右的并发用户数（线程数）,再大的话,容易造成卡顿、无响应等情况,这是受限于Jmeter 其本身的机制和硬件配置（内存、CPU等）
• 由于 Jmeter 是 Java 应用,对 CPU 和内存的消耗较大,在需要模拟大量并发用户数时,单机很容易出现 JAVA内存溢出的错误,导致测试脚本本身就有瓶颈

3、实操

1、Preconditions for control machines and presses:

• jmeter 版本要一致
• jdk 主版本要一致（1.7、1.8…）
• jmeter 脚本中,csv 文件要一致
• jmeter 的插件要一致
• 同一局域网,防火墙开放端口

2、Press operation steps(以linux系统为例)

1. 编辑jmeter.properties文件

• 修改 server_port 端口默认为1009

# RMI port to be used by the server (must start rmiregistry with same port)
server_port=1234

• 修改 server.rmi.port 端口,和 server_port 保持一致即可, The default is to keep you consistent

# To change the default port (1099) used to access the server:
server.rmi.port=1234

• 设置 server.rmi.ssl.disable,默认 false,Delegate requires authentication set to true,减少不必要的麻烦

# Set this if you don't want to use SSL for RMI
server.rmi.ssl.disable=true

2. 启动 jmeter-server 服务

./jmeter-server -Djava.rmi.server.hostname=压力机ip

3、Control machine operation steps

1. 编辑jmeter.properties文件

• 修改 remote_hosts,Multiple presses are separated by commas,如果控制机也测试则加 127.0.0.1:port ,然后修改
  server_port 和 server.rmi.port （和压力机一样步骤）

remote_hosts=192.168.220.129:1234,127.0.0.1:1234
#remote_hosts=localhost:1099,localhost:2010

# RMI port to be used by the server (must start rmiregistry with same port)
server_port=1234

# To change the default port (1099) used to access the server:
server.rmi.port=1234

• 设置 server.rmi.ssl.disable

# Set this if you don't want to use SSL for RMI
server.rmi.ssl.disable=true

• 设置 mode,Used to view the distributed test process,Test results for each press.不启用,在运行过程中,The controller is unable to see the results of the press in real time

mode=Standard

2. The control machine runs distributed tests

jmeter -n -t Distributed test plan.jmx -l C:\Users\one_day_i_will\Desktop\test\Distributed test plan.jtl -e -o C:\Users\one_day_i_will\Desktop\test\report -R 127.0.0.1,192.168.220.129
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