继续上面的操作
 
        <dbServer name="server2">
 
             <!-- PoolableObjectFactory实现类 -->
               <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
                   <property name="manager">defaultManager</property>
 
                     <!-- 真实mysql数据库端口 -->
                       <property name="port">3306</property>
 
                      <!-- 真实mysql数据库IP -->
                        <property name="ipAddress">10.10.0.77</property>
                         <property name="schema">test</property>
 
                         <!-- 用于登陆mysql的用户名 -->
                          <property name="user">test</property>
 
                         <!-- 用于登陆mysql的密码 -->
 
                           <property name="password">123456</property>
 
             </factoryConfig>
 
            <!-- ObjectPool实现类 -->
              <poolConfig class="com.meidusa.amoeba.net.poolable.PoolableObjectPool">
                   <property name="maxActive">200</property>
                   <property name="maxIdle">200</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="master" virtual="true">
             <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
                      <!-- 负载均衡参数 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
                         <property name="loadbalance">1</property>
 
                       <!-- 参与该pool负载均衡的poolName列表以逗号分割 -->
                          <property name="poolNames">server1</property>
              </poolConfig>
       </dbServer>
       <dbServer name="slave" virtual="true">
            <poolConfig class="com.meidusa.amoeba.server.MultipleServerPool">
                 <!-- 负载均衡参数 1=ROUNDROBIN , 2=WEIGHTBASED , 3=HA-->
                       <property name="loadbalance">1</property>
 
                  <!-- 参与该pool负载均衡的poolName列表以逗号分割 -->
                        property name="poolNames">server1,server2</property>
               </poolConfig>
        </dbServer>
 
 
        </dbServerList>
 
<queryRouter class="com.meidusa.amoeba.mysql.parser.MysqlQueryRouter">
             <property name="ruleConfig">${amoeba.home}/conf/rule.xml</property>
              <property name="functionConfig">${amoeba.home}/conf/functionMap.xml</property>
      <property name="ruleFunctionConfig">${amoeba.home}/conf/ruleFunctionMap.xml</property>
               <property name="LRUMapSize">1500</property>
               <property name="defaultPool">master</property>
                <property name="writePool">master</property>
                <property name="readPool">slave</property>
                <property name="needParse">true</property>
        </queryRouter>
</amoeba:configuration>
 
 # /usr/local/amoeba/bin/amoeba &   //启动amoeba服务
 
# ps aux |grep  /usr/local/amoeba
root      9116  0.0  1.0 460460 43028 pts/0    Sl   12:50   0:00 /usr/java/jdk1.5.0_16/bin/java -server -Xms256m -Xmx256m -Xss128k -Damoeba.home=/usr/local/amoeba -Dclassworlds.conf=/usr/local/amoeba/bin/amoeba.classworlds -classpath /usr/local/amoeba/lib/classworlds-1.0.jar org.codehaus.classworlds.Launcher
 
# netstat -lntpu |grep 8066
tcp        0      0 10.10.0.87:8066         :::*      
看到进程以及端口说明amoeba服务启动正常
测试mysql的读写分离
测试之前先要保证amoeba-server有访问两个主从服务器test库的权限,在主从mysql上都执行:
mysql>  grant all on test.* to test@'10.10.0.%' identified by '123456';
mysql>  flush privileges;
 
登录amoeba服务器使用如下命令(用户名密码和上面配置的要一致):
#  mysql -u root -psxit -h10.10.0.87  -P8066  //如果可以登陆并且没有任何错误就说
                                               明是OK的.
 
登录上去后,为了测试读和写必须先把mysql的主从复制停掉,才能更清楚地看出读写的服务器是哪台,在从上使用stop slave;登录到amoeba-mysql上,使用命令mysql -uroot -psxit -h10.10.0.87  -P8066,然后执行写和读操作,查看写的是哪台服务器,读的是哪台服务器,实验结果显示:写只在主上进行,读在主和从都进行,比率是1:1
 
在没有停止同步之前先在master服务器上创建一个表
mysql>  create table sxit (id int(10) ,name varchar(10));
 
然后在slave服务器上停止数据同步
 
mysql> stop slave;
 
在主从上各插入一条不同数据(供测试读的时候用):
在主上插入:insert into sxit values('1','zhangsan');
在从上插入:insert into sxit values('2','lisi');
 
登陆到amoeba服务器,进行读写分离的测试:
 
# mysql -u root -psxit -h10.10.0.87  -P8066
 
mysql> use test;
mysql> select * from sxit;          //第一次执行select是在master服务器上查询的
+------+----------+
| id   | name     |
+------+----------+
|    1 | zhangsan |
+------+----------+
1 row in set (0.00 sec)
 
mysql> select * from sxit;           //第二次执行select是在slave服务器上查询的
+------+------+
| id   | name |
+------+------+
|    2 | lisi |
+------+------+
1 row in set (0.01 sec)
 
mysql> insert into sxit values('3','wangmazi');  //插入一条数据,然后在select
Query OK, 1 row affected (0.05 sec)
 
 
mysql> select * from sxit;      //可以看到上面新插入的语句在master上了
+------+----------+
| id   | name     |
+------+----------+
|    1 | zhangsan |
|    3 | wangmazi |
+------+----------+
2 rows in set (0.00 sec)
 
mysql> select * from sxit;         //slave服务器上是没有这条新的语句的,
+------+------+
| id   | name |
+------+------+
|    2 | lisi |
+------+------+
1 row in set (0.00 sec)
权重的设置
在这里可能会想到,两台数据库服务器,一台主,一台从,按照上面的配置只能是主和从的读取比率是1:1,而写又全部在主上进行,这样主的压力就很大了,所以如果能让主和从的读设置权重,比如设置成1:3,这样就可以很好的解决主从不压力均衡的问题!通过研究确实可以!
配置就是将上面的读的池的配置更改一下:
将<property name="poolNames">server1,server2</property>更改成
<property name="poolNames">server1,server2,server2,server2</property>
 
mysql> select * from sxit;
+------+------+
| id   | name |
+------+------+
|    2 | lisi |
+------+------+
1 row in set (0.00 sec)
 
mysql> select * from sxit;
+------+------+
| id   | name |
+------+------+
|    2 | lisi |
+------+------+
1 row in set (0.01 sec)
 
mysql> select * from sxit;
+------+------+
| id   | name |
+------+------+
|    2 | lisi |
+------+------+
1 row in set (0.00 sec)
 
mysql> select * from sxit;
+------+----------+
| id   | name     |
+------+----------+
|    1 | zhangsan |
|    3 | wangmazi |
+------+----------+
2 rows in set (0.00 sec)
 
//从以上的查询来看,select确实是安装1:3的比例来进行查询的.
 
关于amoeba的其他功能大家可以到官方上去看看,里面有关于垂直和水平切割方面的知识,相关信息如下:
 
amoeba 中文文档下载地址:http://amoeba.meidusa.com/amoeba.pdf