Mycat分庫

   項目中存在多個數據庫，每個數據庫中有很多張表，可以通過mycat指定查詢該表的時候去那個庫中查詢，這樣減少了代碼的大量書寫和配置。
 

1.增加customer表 該表在mycat02庫中
2.配置 schema.xml
 

<mycat:schema xmlns:mycat="http://io.mycat/">
 
        <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">
                <table name="customer" dataNode="dn2" ></table>
        </schema>
        <dataNode name="dn1" dataHost="host1" database="mycat01" />
        <dataNode name="dn2" dataHost="host2" database="mycat02" />
        <dataHost name="host1" maxCon="1000" minCon="10" balance="2"
                          writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
                <heartbeat>select user()</heartbeat>
                <writeHost host="hostm1" url="xxxxxx:3306" user="root"
                                   password="123123">
                       <readHost host="hosts1" url="aaaaaaa:3306" user="root"
                                   password="123123">
                       </readHost>
                </writeHost>
        </dataHost>
<!-- 制定customer表所在的mysql服務器地址 -->
        <dataHost name="host2" maxCon="1000" minCon="10" balance="0"
                          writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
                <heartbeat>select user()</heartbeat>
                <writeHost host="hostm2" url="xxxxxxxx:3306" user="root"
                                   password="123123">
                </writeHost>
        </dataHost>
 
</mycat:schema>

2.重啓mycat

./mycat start