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官方简介
Amoeba的中文意思是变型虫
主要解决:
• 降低 数据切分带来的复杂多数据库结构
• 提供切分规则并降低 数据切分规则 给应用带来的影响
• 降低db 与客户端的连接数
• 读写分离
个人简单描述
可能你还没明白Amoebla这鬼东西主要干麻的呢!比方说PHP环境众所周知,PHP没有数据连接池,如果PHP环境下MYSQL访问量大时会蹦掉,除非配置Cluster集群,而Amoeba就是在PHP程序和MYSQL之间,充当一个缓冲的作用。
准备工作
Server:192.168.1.208 #Amoeba
Server:192.168.1.11 #NDBD1(主)
Server:1921.68.1.13 #NDBD2(从)
注:11和13两台服务器上,事先请安装好MYSQL单向步
另请安装MYSQL版本必须5.1以上,因为新版的Amoeba2.10对5.1以下版本不稳定。
结构图
Step 1:配置Amoeba192.168.2.8读写分离
1:解压安装包
[root@Management down]# mkdir /usr/local/amoeba
[root@Management down]# tar -zxf amoeba-mysql-binary-2.1.0-RC5.tar.gz -C /usr/local/amoeba/
2:进入配置目录,浏览文件
[root@Management down]# cd /usr/local/amoeba/
[root@Management amoeba]# ll
total 88
drwxr-xr-x 2 root root 4096 Jul 26 11:57 benchmark
drwxr-xr-x 2 root root 4096 Feb 28 09:25 bin
-rw-r--r-- 1 root root 3983 May 18 13:43 changelogs.txt
drwxr-xr-x 2 root root 4096 Jul 26 11:57 conf
drwxr-xr-x 3 root root 4096 Jul 26 11:57 lib
-rw-r--r-- 1 root root 34520 May 18 13:43 LICENSE.txt
-rw-r--r-- 1 root root 2031 May 18 13:43 README.html
3:进入主配置文件目录
[root@Management amoeba]# cd conf/
[root@Management conf]# ls
access_list.conf amoeba.xml dbServers.xml functionMap.xml log4j.xml ruleFunctionMap.xml
amoeba.dtd dbserver.dtd function.dtd log4j.dtd rule.dtd rule.xml
在这里我主要介绍配置 amoeba.xml、 dbServers.xml、 log4j.xml 三个主要的配置文件,其它文件没有特殊需要默认就可以了夺
4:vi amoeba.xml 修改主配置文件
4.1)把默认端口8066改成3306
4.2)把默认连接用户名和密码改成自己的
4.3)把默认的客户端线程数,请求数及服务端回应数改成200,300,300
4.4)把默认注释掉的读写分离选项,把注释去掉并readpool修改成server2
5:vi dbServers.xml 增加SEVER2模块,里面的连接用户名密码及地址都表示两台MYSQL的物理机器,192.168.1.11和192.168.1.13 另SERVER1是写,SERVER是读
需要手动增加SERVER2代码如下:
最终改变成如下:
6:修改log4j.xml 取消日志文件生成(太大了,磁盘很容易满)
改成
7:性能优化,打开bin/amoeba
DEFAULT_OPTS="-server -Xms256m -Xmx256m -Xss128k"
改成
DEFAULT_OPTS="-server -Xms512m -Xmx512m -Xmn100m -Xss1204k"
8:启动amoeba
nohup /usr/local/amoeba/bin/amoeba start 2>&1 >/dev/null &
本文出自 “Intelligence” 博客

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