部署Amoeba3 for Mysql
推荐阅读：：：：http://docs.hexnova.com/amoeba/
Amoeba for Mysql软件，致力于MySQL的分布式数据库前端代理层，它主要在应用层访问MySQL的时候充当SQL路由功能，专注于分布式数据库代理层（Database Proxy）开发。座落与Client、DB之间,对客户端透明。具有负载均衡、高可用性、SQL过滤、读写分离、可路由相关的到目标数据库、可并发请求多台数据库合并结果。
Master：192.168.0.1
Slave1：192.168.0.2
Slave2：192.168.0.3
Amoeba：192.168.0.4
均在Amoeba机器上操作
安装JDK,Amoeba for mysq是基于JAVA环境开发的，所以系统要支持JAVA
wget http:
//download
.oracle.com
/otn/java/jdk/6u45-b06/jdk-6u45-linux-x64-rpm
.bin
chmod
+x jdk-6u45-linux-x64-rpm.bin
.
/jdk-6u45-linux-x64-rpm
.bin
配置JAVA环境
JKD默认安装到/usr/java/下
创建软链接
ln -s /usr/java/jdk1.6.0_45 /usr/java/jdk
编辑~/.bash_profile,添加以下内容
JAVA_HOME=/usr/java/jdk
export JAVA_HOME
export CLASSPATH=.:JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export PATH
安装Amoeba for mysql
wget http:
//jaist
.dl.sourceforge.net
/project/amoeba/Amoeba
%20for%20mysql
/3
.x
/amoeba-mysql-3
.0.5-RC-distribution.zip
unzip amoeba-mysql-3.0.5-RC-distribution.zip
mv
amoeba-mysql-3.0.5-RC
/usr/local/amoeba
Amoeba到此就安装完毕，接下来就是配置读写分离，因为Amoeba3.x较2.x有较大改动，所以贴下我的配置项。
首先，设置conf/dbServer.xml中连接的库名及帐号密码
<
dbServer
name
=
"abstractServer"
abstractive
=
"true"
>
- - - - - 省略 - - - - - -
<!-- mysql port -->
<
property
name
=
"port"
>3306</
property
>
<!-- mysql schema -->
<
property
name
=
"schema"
>数据库名</
property
>
<!-- mysql user -->
<
property
name
=
"user"
>账号</
property
>
<
property
name
=
"password"
>密码</
property
>
- - - - - - - - - 省略 - - - - - - -
</
dbServer
>
设置数据库池,其中Slave1，Slave2作轮询
<
dbServer
name
=
"Master"
parent
=
"abstractServer"
>
<
factoryConfig
>
<!-- mysql ip -->
<
property
name
=
"ipAddress"
>192.168.0.1</
property
>
</
factoryConfig
>
</
dbServer
>
<
dbServer
name
=
"Slave1"
parent
=
"abstractServer"
>
<
factoryConfig
>
<!-- mysql ip -->
<
property
name
=
"ipAddress"
>192.168.0.2</
property
>
</
factoryConfig
>
</
dbServer
>
<
dbServer
name
=
"Slave2"
parent
=
"abstractServer"
>
<
factoryConfig
>
<!-- mysql ip -->
<
property
name
=
"ipAddress"
>192.168.0.3</
property
>
</
factoryConfig
>
</
dbServer
>
<
dbServer
name
=
"VirtualPool"
virtual
=
"true"
>
<
poolConfig
class
=
"com.meidusa.amoeba.server.MultipleServerPool"
>
<!-- Load balancing strategy: 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
<
property
name
=
"loadbalance"
>1</
property
>
<!-- Separated by commas,such as: server1,server2,server1 -->
<
property
name
=
"poolNames"
>Slave1,Slave2</
property
>
</
poolConfig
>
</
dbServer
>
接下来配置amoeba.xml
<
property
name
=
"authenticateProvider"
>
- - - - - - 省略 - - -
<
property
name
=
"user"
>账号</
property
>
<
property
name
=
"password"
>密码</
property
>
<
property
name
=
"filter"
>
- - - - - - 省略 - - -
</
property
>
<
queryRouter
class
=
"com.meidusa.amoeba.mysql.parser.MysqlQueryRouter"
>
- - - - - - 省略 - - - - -
<
property
name
=
"defaultPool"
>Master</
property
>
<
property
name
=
"writePool"
>Master</
property
>
<
property
name
=
"readPool"
>VirtualPool</
property
>
- - - - - - 省略 - - - - -
</
queryRouter
>
读写分离到此配置完成，接着启动amoebe
/usr/local/amoeba2/bin/launcher
在部署Amoeba时，注意下
1：防火墙要开放8066端口
2：给bin目录执行权限：chmod +x bin/*
优化性能：
1：在amoeba目录下有个JVM的配置文件，设置其中的JVM_OPTIONS="-server -Xms1024m -Xmx1024m -Xss256k -XX:PermSize=16m -XX:MaxPermSize=96m"可提升JVM性能，具体大小看各位需求；
2：多线程配置：runtime元素；
3：网络相关（缓冲区等）：connectionFactory
参考：http://zhiliang92.blog.51cto.com/3392968/1294384