mycat数据库中间件透明实现MYSQL读写分离
mycat数据库中间件透明实现MYSQL读写分离
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mycat数据库中间件透明实现MYSQL读写分离
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摘要: 使用Mycat数据库中间件实现MYSQL读写分离

使用Mycat数据库中间件实现MYSQL读写分离步骤

1. mycat官网下载mycat,这里以1.5.1-RELEASE版本为例

2. 在conf文件夹下针对server.xml和server.xml文件进行读写分离的配置

    2.1 配置schema.xml(主要配置数据库信息)

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://org.opencloudb/" >

	<schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">
	</schema>

	<dataNode name="dn1" dataHost="localhost1" database="shop" />
	
	<dataHost name="localhost1" maxCon="1000" minCon="10" balance="3"
		writeType="0" dbType="mysql" dbDriver="native" switchType="-1"  slaveThreshold="100">
		<heartbeat>select 1</heartbeat>
		<!-- can have multi write hosts -->
		<writeHost host="master" url="127.0.0.1:3306" user="root" password="root">
			<!-- can have multi read hosts -->
			<readHost host="slave1" url="127.0.0.1:3307" user="root" password="root" />
			<readHost host="slave2" url="127.0.0.1:3308" user="root" password="root" />
		</writeHost>
	</dataHost>
</mycat:schema>

    2.2 配置server.xml(主要配置用户及权限信息)

<?xml version="1.0" encoding="UTF-8"?>
<!-- - - Licensed under the Apache License, Version 2.0 (the "License"); 
	- you may not use this file except in compliance with the License. - You 
	may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 
	- - Unless required by applicable law or agreed to in writing, software - 
	distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT 
	WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the 
	License for the specific language governing permissions and - limitations 
	under the License. -->
<!DOCTYPE mycat:server SYSTEM "server.dtd">
<mycat:server xmlns:mycat="http://org.opencloudb/">
	<system>
	<property name="defaultSqlParser">druidparser</property>
      <!--  <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议-->
	<!-- <property name="processorBufferChunk">40960</property> -->
	<!-- 
	<property name="processors">1</property> 
	<property name="processorExecutor">32</property> 
	 -->
		<!--默认是65535 64K 用于sql解析时最大文本长度 -->
		<!--<property name="maxStringLiteralLength">65535</property>-->
		<!--<property name="sequnceHandlerType">0</property>-->
		<!--<property name="backSocketNoDelay">1</property>-->
		<!--<property name="frontSocketNoDelay">1</property>-->
		<!--<property name="processorExecutor">16</property>-->
		<!-- 
			<property name="mutiNodeLimitType">1</property> 0:开启小数量级(默认) ;1:开启亿级数据排序
	    	<property name="mutiNodePatchSize">100</property> 亿级数量排序批量
			<property name="processors">32</property> <property name="processorExecutor">32</property> 
			<property name="serverPort">8066</property> <property name="managerPort">9066</property> 
			<property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> 
			<property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> -->
	</system>
	<user name="test">
		<property name="password">test</property>
		<property name="schemas">TESTDB</property>
	</user>

	<user name="user">
		<property name="password">user</property>
		<property name="schemas">TESTDB</property>
		<property name="readOnly">true</property>
	</user>
	<!-- 
	<quarantine> 
	   <whitehost>
	      <host host="127.0.0.1" user="mycat"/>
	      <host host="127.0.0.2" user="mycat"/>
	   </whitehost>
       <blacklist check="false"></blacklist>
	</quarantine>
	-->

</mycat:server>

3. 启动mycat

4. 通过命令mysql -uuser -puser -P8066连接mycat,查看mycat状态

 

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