mycat数据库中间件透明实现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