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，不会配置访问http://skyson.blog.51cto.com/2497647/556600
  • 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. 1：解压安装包
  2. [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/
  1. 2：进入配置目录，浏览文件
  2. [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. 3：进入主配置文件目录
  4. [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
  1. 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
  2. 4：vi amoeba.xml 修改主配置文件
  • 4.1）把默认端口8066改成3306
  • "port">3066
  • 4.2）把默认连接用户名和密码改成自己的
  • "user">sky

                                                                                    "password">123456
  • 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
  • "readThreadPoolSize">200

                                                    
                                                    "clientSideThreadPoolSize">300

                                                    
                                                    "serverSideThreadPoolSize">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

  •                                 "writePool">server1
                                    "readPool">server2

                                         
  1.  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
  3. 需要手动增加SERVER2代码如下：
  4.    < dbServer name ="abstractServer" abstractive ="true" >

         < factoryConfig class ="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory" >

           < property name ="manager" >${defaultManager} property >

           < property name ="sendBufferSize" >64 property >

           < property name ="receiveBufferSize" >128 property >

            

          

           < property name ="port" >3306 property >

            

          

           < property name ="schema" >test property >

            

          

           < property name ="user" >root property >

            

          

           < property name ="password" >123456 property >

         factoryConfig >



         < poolConfig class ="com.meidusa.amoeba.net.poolable.PoolableObjectPool" >

           < property name ="maxActive" >500 property >

           < property name ="maxIdle" >500 property >

           < property name ="minIdle" >10 property >

           < property name ="minEvictableIdleTimeMillis" >600000 property >

           < property name ="timeBetweenEvictionRunsMillis" >600000 property >

           < property name ="testOnBorrow" >true property >

           < property name ="testWhileIdle" >true property >

         poolConfig >

       dbServer >



       < dbServer name ="server1"     parent ="abstractServer" >

         < factoryConfig >

          

           < property name ="ipAddress" >192.168.2.11 property >

         factoryConfig >

       dbServer >


  1. 最终改变成如下：
  1. xml version ="1.0" encoding ="gbk" ?>





    < amoeba:dbServers xmlns:amoeba ="http://amoeba.meidusa.com/" >



        

        

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

         < factoryConfig class ="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory" >

           < property name ="manager" >${defaultManager} property >

           < property name ="sendBufferSize" >64 property >

           < property name ="receiveBufferSize" >128 property >

            

          

           < property name ="port" >3306 property >

            

          

           < property name ="schema" >test property >

            

          

           < property name ="user" >root property >

            

          

           < property name ="password" >123456 property >

         factoryConfig >



         < poolConfig class ="com.meidusa.amoeba.net.poolable.PoolableObjectPool" >

           < property name ="maxActive" >500 property >

           < property name ="maxIdle" >500 property >

           < property name ="minIdle" >10 property >

           < property name ="minEvictableIdleTimeMillis" >600000 property >

           < property name ="timeBetweenEvictionRunsMillis" >600000 property >

           < property name ="testOnBorrow" >true property >

           < property name ="testWhileIdle" >true property >

         poolConfig >

       dbServer >



       < dbServer name ="server1"     parent ="abstractServer" >

         < factoryConfig >

          

           < property name ="ipAddress" >192.168.2.11 property >

         factoryConfig >

       dbServer >





          





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

         < factoryConfig class ="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory" >

           < property name ="manager" >${defaultManager} property >

           < property name ="sendBufferSize" >64 property >

           < property name ="receiveBufferSize" >128 property >

            

          

           < property name ="port" >3306 property >

            

          

           < property name ="schema" >test property >

            

          

           < property name ="user" >root property >

            

           < property name ="password" >123456 property >

         factoryConfig >



         < poolConfig class ="com.meidusa.amoeba.net.poolable.PoolableObjectPool" >

           < property name ="maxActive" >500 property >

           < property name ="maxIdle" >500 property >

           < property name ="minIdle" >10 property >

           < property name ="minEvictableIdleTimeMillis" >600000 property >

           < property name ="timeBetweenEvictionRunsMillis" >600000 property >

           < property name ="testOnBorrow" >true property >

           < property name ="testWhileIdle" >true property >

         poolConfig >

       dbServer >



       < dbServer name ="server2"     parent ="abstractServer" >

         < factoryConfig >

          

           < property name ="ipAddress" >192.168.2.13 property >

         factoryConfig >

       dbServer > 


      < dbServer name ="multiPool" virtual ="true" >

         < poolConfig class ="com.meidusa.amoeba.server.MultipleServerPool" >

          

           < property name ="loadbalance" >1 property >

            

          

           < property name ="poolNames" >server1 property >

         poolConfig >

       dbServer >

        

    amoeba:dbServers >



  • 6：修改log4j.xml 取消日志文件生成（太大了，磁盘很容易满）
  • < param name ="file" value ="${amoeba.home}/logs/project.log" />
    改成
    < param name ="file" value=">    /dev/null]]>"/>
  • 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 &