部署Amoeba3 for Mysql

推薦閱讀：：：：http://docs.hexnova.com/amoeba/

   Amoeba for Mysql軟件，致力於MySQL的分佈式數據庫前端代理層，它主要在應用層訪問MySQL的時候充當SQL路由功能，專一於分佈式數據庫代理層（Database Proxy）開發。座落與Client、DB之間,對客戶端透明。具備負載均衡、高可用性、SQL過濾、讀寫分離、可路由相關的到目標數據庫、可併發請求多臺數據庫合併結果。

Master：192.168.0.1

Slave1：192.168.0.2

Slave2：192.168.0.3

Amoeba：192.168.0.4

均在Amoeba機器上操做

安裝JDK,Amoeba for mysq是基於JAVA環境開發的，因此係統要支持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環境

JKD默認安裝到/usr/java/下

建立軟連接

ln -s /usr/java/jdk1.6.0_45 /usr/java/jdk

編輯~/.bash_profile,添加如下內容

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

安裝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到此就安裝完畢，接下來就是配置讀寫分離，由於Amoeba3.x較2.x有較大改動，因此貼下個人配置項。

首先，設置conf/dbServer.xml中鏈接的庫名及賬號密碼

< dbServer  name = "abstractServer"  abstractive = "true" >

- - - - - 省略 - - - - - -              

             <!-- mysql port -->

             < property  name = "port" >3306</ property >

                                                                                                                                                                                                                                                                                                                            

             <!-- mysql schema -->

             < property  name = "schema" >數據庫名</ property >

                                                                                                                                                                                                                                                                                                                            

             <!-- mysql user -->

             < property  name = "user" >帳號</ property >

                                                                                                                                                                                                                                                                                                                            

             < property  name = "password" >密碼</ property >

- - - - - - - - - 省略 - - - - - - -

     </ dbServer >

 設置數據庫池,其中Slave1，Slave2做輪詢

< 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 >

接下來配置amoeba.xml

< property  name = "authenticateProvider" >

- - - - - - 省略 - - -                  

                     < property  name = "user" >帳號</ property >

                                                                                                                                                                                                                                                                                                                 

                     < property  name = "password" >密碼</ 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 >

讀寫分離到此配置完成，接着啓動amoebe

/usr/local/amoeba2/bin/launcher

在部署Amoeba時，注意下

1：防火牆要開放8066端口

2：給bin目錄執行權限：chmod +x bin/*

優化性能：

1：在amoeba目錄下有個JVM的配置文件，設置其中的JVM_OPTIONS="-server -Xms1024m -Xmx1024m -Xss256k -XX:PermSize=16m -XX:MaxPermSize=96m"可提高JVM性能，具體大小看各位需求；

2：多線程配置：runtime元素；

3：網絡相關（緩衝區等）：connectionFactory

參考：http://zhiliang92.blog.51cto.com/3392968/1294384