Based on MYCAT1.6 single-table multi-database horizontal slicing, the data is evenly divided into 3 databases:
1. Placement schema.xml
<?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="schema1" checkSQLschema="false" sqlMaxLimit="100" > <table name="t_user" primaryKey="id" dataNode="dn$1-3" rule="mod-long" /> </schema> <dataNode name="dn1" dataHost="dtHost1" database="db1" /> <dataNode name="dn2" dataHost="dtHost2" database="db1" /> <dataNode name="dn3" dataHost="dtHost3" database="db1" /> <dataHost name="dtHost1" maxCon="500" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" > <heartbeat>select user()</heartbeat> <writeHost host="hostM1" url="192.168.158.131:3306" user="root" password="root" /> </dataHost> <dataHost name="dtHost2" maxCon="500" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" > <heartbeat>select user()</heartbeat> <writeHost host="hostM2" url="192.168.158.134:3306" user="root" password="root" /> </dataHost> <dataHost name="dtHost3" maxCon="500" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" > <heartbeat>select user()</heartbeat> <writeHost host="hostM3" url="192.168.158.130:3306" user="root" password="root" /> </dataHost> </mycat:schema>
2. Configure server.xml, parameters that need to be changed
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mycat:server SYSTEM "server.dtd"> <mycat:server xmlns:mycat="http://io.mycat/"> <system> <property name="charset">utf8mb4</property> <property name="sequnceHandlerType">1</property><!--1The primary key strategy is database mode--> </system> <user name="root"> <property name="password">root</property> <property name="schemas">schema1</property> </user> <user name="root2"> <property name="password">root</property> <property name="schemas">schema1</property> <property name="readOnly">true</property> </user> </mycat:server>
3. "Primary key strategy is database mode" can refer to the following
http://www.cnblogs.com/raphael5200/p/5900007.html