构建高性能web之路------mysql读写分离实战

构建高性能web之路------mysql读写分离实战
一个完整的mysql读写分离环境包括以下几个部分：
- 应用程序client
- database proxy
- database集群
在本次实战中，应用程序client基于c3p0连接后端的database proxy。database proxy负责管理client实际访问database的路由策略，采用开源框架amoeba。database集群采用mysql的master-slave的replication方案。整个环境的结构图如下所示：

实战步骤与详解

一.搭建mysql的master-slave环境

1）分别在host1（10.20.147.110）和host2（10.20.147.111）上安装mysql（5.0.45），具体安装方法可见官方文档

2）配置master

首先编辑/etc/my.cnf，添加以下配置：

log-bin=mysql-bin #slave会基于此log-bin来做replication server-id=1 #master的标示 binlog-do-db = amoeba_study #用于master-slave的具体数据库

然后添加专门用于replication的用户：

mysql> GRANT REPLICATION SLAVE ON *.* TO repl@10.20.147.111 IDENTIFIED BY '111111';

重启mysql，使得配置生效：

/etc/init.d/mysqld restart

最后查看master状态：

3）配置slave

首先编辑/etc/my.cnf，添加以下配置：

server-id=2 #slave的标示

配置生效后，配置与master的连接：

mysql> CHANGE MASTER TO -> MASTER_HOST='10.20.147.110', -> MASTER_USER='repl', -> MASTER_PASSWORD='111111', -> MASTER_LOG_FILE='mysql-bin.000003', -> MASTER_LOG_POS=161261;

其中MASTER_HOST是master机的ip，MASTER_USER和MASTER_PASSWORD就是我们刚才在master上添加的用户，MASTER_LOG_FILE和MASTER_LOG_POS对应与master status里的信息

最后启动slave：

mysql> start slave;

4）验证master-slave搭建生效

通过查看slave机的log（/var/log/mysqld.log）：

100703 10:51:42 [Note] Slave I/O thread: connected to master 'repl@10.20.147.110:3306', replication started in log 'mysql-bin.000003' at position 161261

如看到以上信息则证明搭建成功，如果有问题也可通过此log找原因

二.搭建database proxy

此次实战中database proxy采用amoeba ，它的相关信息可以查阅官方文档，不在此详述

1）安装amoeba

下载amoeba（1.2.0-GA）后解压到本地（D:/openSource/amoeba-mysql-1.2.0-GA），即完成安装

2）配置amoeba

先配置proxy连接和与各后端mysql服务器连接信息（D:/openSource/amoeba-mysql-1.2.0-GA/conf/amoeba.xml）：
[xhtml] view plain copy print ?
1. <server>
2. 
3. <property name="port">8066</property>
5. 
6. 
9. 
10. <property name="readThreadPoolSize">20</property>
12. 
13. <property name="clientSideThreadPoolSize">30</property>
15. 
16. <property name="serverSideThreadPoolSize">30</property>
18. 
19. <property name="netBufferSize">128</property>
21. 
22. <property name="tcpNoDelay">true</property>
24. 
25. <property name="user">root</property>
27. 
28. <property name="password">root</property>
29. </server>
<server>  <property name="port">8066</property>    <property name="readThreadPoolSize">20</property>  <property name="clientSideThreadPoolSize">30</property>  <property name="serverSideThreadPoolSize">30</property>  <property name="netBufferSize">128</property>  <property name="tcpNoDelay">true</property>  <property name="user">root</property>  <property name="password">root</property> </server>

以上是proxy提供给client的连接配置
[xhtml] view plain copy print ?
1. <dbServerList>
2. <dbServer name="server1">
3. 
4. <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
5. <property name="manager">defaultManager</property>
7. 
8. <property name="port">3306</property>
10. 
11. <property name="ipAddress">10.20.147.110</property>
12. <property name="schema">amoeba_study</property>
14. 
15. <property name="user">root</property>
17. 
18. <property name="password"></property>
20. </factoryConfig>
22. 
23. <poolConfig class="com.meidusa.amoeba.net.poolable.PoolableObjectPool">
24. <property name="maxActive">200</property>
25. <property name="maxIdle">200</property>
26. <property name="minIdle">10</property>
27. <property name="minEvictableIdleTimeMillis">600000</property>
28. <property name="timeBetweenEvictionRunsMillis">600000</property>
29. <property name="testOnBorrow">true</property>
30. <property name="testWhileIdle">true</property>
31. </poolConfig>
32. </dbServer>
33. <dbServer name="server2">
35. 
36. <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory">
37. <property name="manager">defaultManager</property>
39. 
40. <property name="port">3306</property>
42. 
43. <property name="ipAddress">10.20.147.111</property>
44. <property name="schema">amoeba_study</property>
46. 
47. <property name="user">root</property>
49. 
50. <property name="password"></property>
52. </factoryConfig>
54. 
55. <poolConfig class="com.meidusa.amoeba.net.poolable.PoolableObjectPool">
56. <property name="maxActive">200</property>
57. <property name="maxIdle">200</property>
58. <property name="minIdle">10</property>
59. <property name="minEvictableIdleTimeMillis">600000</property>
60. <property name="timeBetweenEvictionRunsMillis">600000</property>
61. <property name="testOnBorrow">true</property>
62. <property name="testWhileIdle">true</property>
63. </poolConfig>
64. </dbServer>
65. </dbServerList>
<dbServerList> <dbServer name="server1">  <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory"> <property name="manager">defaultManager</property>  <property name="port">3306</property>  <property name="ipAddress">10.20.147.110</property> <property name="schema">amoeba_study</property>  <property name="user">root</property>  <property name="password"></property> </factoryConfig>  <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="server2">  <factoryConfig class="com.meidusa.amoeba.mysql.net.MysqlServerConnectionFactory"> <property name="manager">defaultManager</property>  <property name="port">3306</property>  <property name="ipAddress">10.20.147.111</property> <property name="schema">amoeba_study</property>  <property name="user">root</property>  <property name="password"></property> </factoryConfig>  <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> </dbServerList>

以上是proxy与后端各mysql数据库服务器配置信息，具体配置见注释很明白了

最后配置读写分离策略：
[xhtml] view plain copy print ?
1. <queryRouter class="com.meidusa.amoeba.mysql.parser.MysqlQueryRouter">
2. <property name="LRUMapSize">1500</property>
3. <property name="defaultPool">server1</property>
4. <property name="writePool">server1</property>
5. <property name="readPool">server2</property>
6. <property name="needParse">true</property>
7. </queryRouter>
<queryRouter class="com.meidusa.amoeba.mysql.parser.MysqlQueryRouter"> <property name="LRUMapSize">1500</property> <property name="defaultPool">server1</property> <property name="writePool">server1</property> <property name="readPool">server2</property> <property name="needParse">true</property> </queryRouter>

从以上配置不然发现，写操作路由到server1（master），读操作路由到server2（slave）

3）启动amoeba

在命令行里运行D:/openSource/amoeba-mysql-1.2.0-GA/amoeba.bat即可：

log4j:WARN log4j config load completed from file:D:/openSource/amoeba-mysql-1.2.0-GA/conf/log4j.xml log4j:WARN ip access config load completed from file:D:/openSource/amoeba-mysql-1.2.0-GA/conf/access_list.conf 2010-07-03 09:55:33,821 INFO net.ServerableConnectionManager - Server listening on 0.0.0.0/0.0.0.0:8066. 三.client端调用与测试

1）编写client调用程序

具体程序细节就不详述了，只是一个最普通的基于mysql driver的jdbc的数据库操作程序

2）配置数据库连接

本client基于c3p0，具体数据源配置如下：
[xhtml] view plain copy print ?
1. <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
2. destroy-method="close">
3. <property name="driverClass" value="com.mysql.jdbc.Driver" />
4. <property name="jdbcUrl" value="jdbc:mysql://localhost:8066/amoeba_study" />
5. <property name="user" value="root" />
6. <property name="password" value="root" />
7. <property name="minPoolSize" value="1" />
8. <property name="maxPoolSize" value="1" />
9. <property name="maxIdleTime" value="1800" />
10. <property name="acquireIncrement" value="1" />
11. <property name="maxStatements" value="0" />
12. <property name="initialPoolSize" value="1" />
13. <property name="idleConnectionTestPeriod" value="1800" />
14. <property name="acquireRetryAttempts" value="6" />
15. <property name="acquireRetryDelay" value="1000" />
16. <property name="breakAfterAcquireFailure" value="false" />
17. <property name="testConnectionOnCheckout" value="true" />
18. <property name="testConnectionOnCheckin" value="false" />
19. </bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="com.mysql.jdbc.Driver" /> <property name="jdbcUrl" value="jdbc:mysql://localhost:8066/amoeba_study" /> <property name="user" value="root" /> <property name="password" value="root" /> <property name="minPoolSize" value="1" /> <property name="maxPoolSize" value="1" /> <property name="maxIdleTime" value="1800" /> <property name="acquireIncrement" value="1" /> <property name="maxStatements" value="0" /> <property name="initialPoolSize" value="1" /> <property name="idleConnectionTestPeriod" value="1800" /> <property name="acquireRetryAttempts" value="6" /> <property name="acquireRetryDelay" value="1000" /> <property name="breakAfterAcquireFailure" value="false" /> <property name="testConnectionOnCheckout" value="true" /> <property name="testConnectionOnCheckin" value="false" /> </bean>

值得注意是，client端只需连到proxy，与实际的数据库没有任何关系，因此jdbcUrl、user、password配置都对应于amoeba暴露出来的配置信息

3）调用与测试

首先插入一条数据：insert into zone_by_id(id,name) values(20003,'name_20003')

通过查看master机上的日志/var/lib/mysql/mysql_log.log：

100703 11:58:42       1 Query       set names latin1                       1 Query       SET NAMES latin1                       1 Query       SET character_set_results = NULL                       1 Query       SHOW VARIABLES                       1 Query       SHOW COLLATION                       1 Query       SET autocommit=1                       1 Query       SET sql_mode='STRICT_TRANS_TABLES'                       1 Query       SHOW VARIABLES LIKE 'tx_isolation'                       1 Query       SHOW FULL TABLES FROM `amoeba_study` LIKE 'PROBABLYNOT'                       1 Prepare     [1] insert into zone_by_id(id,name) values(?,?)                       1 Prepare     [2] insert into zone_by_id(id,name) values(?,?)                                 1 Execute     [2] insert into zone_by_id(id,name) values(20003,'name_20003')

得知写操作发生在master机上

通过查看slave机上的日志/var/lib/mysql/mysql_log.log：

100703 11:58:42       2 Query       insert into zone_by_id(id,name) values(20003,'name_20003')

得知slave同步执行了这条语句

然后查一条数据：select t.name from zone_by_id t where t.id = 20003

通过查看slave机上的日志/var/lib/mysql/mysql_log.log：

100703 12:02:00      33 Query       set names latin1                      33 Prepare     [1] select t.name from zone_by_id t where t.id = ?                      33 Prepare     [2] select t.name from zone_by_id t where t.id = ?                         33 Execute     [2] select t.name from zone_by_id t where t.id = 20003

得知读操作发生在slave机上

并且通过查看slave机上的日志/var/lib/mysql/mysql_log.log发现这条语句没在master上执行

通过以上验证得知简单的master-slave搭建和实战得以生效
相关阅读:
牛客练习赛44 A 小y的序列（模拟，细节）
牛客假日团队赛10 L 乘积最大（dp，大数）
三分查找
 几何基础知识点
 POJ 2318 TOYS
UVA 11916 Emoogle Grid（大步小步算法（解模方程对数）快速幂模的逆）
UVA 11426 GCD
Aladdin and the Flying Carpet（算术基本定理）
算术基本定理
 数论总结帖
原文地址：https://www.cnblogs.com/firstdream/p/7850866.html