mycat水平分库-对用户id取模

schema.xml:

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

	<schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100" >
		<table name="tb_user" dataNode="dn1,dn2" rule="my_mod_rule"/>
	</schema>
	 
	<dataNode name="dn1" dataHost="host1" database="jeesun_user" />
	<dataNode name="dn2" dataHost="host2" database="jeesun_user" />
	
	<dataHost name="host1" maxCon="1000" minCon="10" balance="0"
			  writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
		<heartbeat>select user()</heartbeat>
		<!-- can have multi write hosts -->
		<writeHost host="hostM1" url="192.168.31.52:3306" user="root"
				   password="root12">
		</writeHost>
   
	</dataHost>
	
    <dataHost name="host2" maxCon="1000" minCon="10" balance="0"
			  writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
		<heartbeat>select user()</heartbeat>
		<!-- can have multi write hosts -->
		<writeHost host="hostM1" url="192.168.31.52:3308" user="root"
				   password="root12">
	</writeHost>
   
	</dataHost>
	
</mycat:schema>

rule.xml:

	<tableRule name="my_mod_rule">
		<rule>
			<columns>user_id</columns>
			<algorithm>my_mod-long</algorithm>
		</rule>
	</tableRule>

	<function name="my_mod-long" class="io.mycat.route.function.PartitionByMod">
		<!-- how many data nodes -->
		<property name="count">2</property>
	</function>