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  • mycat中间件--schema.xml配置文件详解

    schema.xml管理着MyCat的逻辑库、表、分片规则、DataNode以及DataSource。弄懂这些配置,是正确使用MyCat的前提。

    <?xml version="1.0"?>
    <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
    <mycat:schema xmlns:mycat="http://io.mycat/">
    
        <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100">
            <!-- auto sharding by id (long) -->
            <table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" />
    
            <!-- global table is auto cloned to all defined data nodes ,so can join
                with any table whose sharding node is in the same data node -->
            <table name="company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" />
            <table name="goods" primaryKey="ID" type="global" dataNode="dn1,dn2" />
            <!-- random sharding using mod sharind rule -->
            <table name="hotnews" primaryKey="ID" autoIncrement="true" dataNode="dn1,dn2,dn3"
                   rule="mod-long" />
            <!-- <table name="dual" primaryKey="ID" dataNode="dnx,dnoracle2" type="global"
                needAddLimit="false"/> <table name="worker" primaryKey="ID" dataNode="jdbc_dn1,jdbc_dn2,jdbc_dn3"
                rule="mod-long" /> -->
            <table name="employee" primaryKey="ID" dataNode="dn1,dn2"
                   rule="sharding-by-intfile" />
            <table name="customer" primaryKey="ID" dataNode="dn1,dn2"
                   rule="sharding-by-intfile">
                <childTable name="orders" primaryKey="ID" joinKey="customer_id"
                            parentKey="id">
                    <childTable name="order_items" joinKey="order_id"
                                parentKey="id" />
                </childTable>
                <childTable name="customer_addr" primaryKey="ID" joinKey="customer_id"
                            parentKey="id" />
            </table>
            <!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate"
                /> -->
        </schema>
        <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"
            /> -->
        <dataNode name="dn1" dataHost="localhost1" database="db1" />
        <dataNode name="dn2" dataHost="localhost1" database="db2" />
        <dataNode name="dn3" dataHost="localhost1" database="db3" />
        <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" />
         <dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" />
        <dataNode    name="jdbc_dn2" dataHost="jdbchost" database="db2" />
        <dataNode name="jdbc_dn3"     dataHost="jdbchost" database="db3" /> -->
        <dataHost name="localhost1" 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="localhost:3306" user="root"
                       password="123456">
                <!-- can have multi read hosts -->
                <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />
            </writeHost>
            <writeHost host="hostS1" url="localhost:3316" user="root"
                       password="123456" />
            <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->
        </dataHost>
        <!--
            <dataHost name="sequoiadb1" maxCon="1000" minCon="1" balance="0" dbType="sequoiadb" dbDriver="jdbc">
            <heartbeat>         </heartbeat>
             <writeHost host="hostM1" url="sequoiadb://1426587161.dbaas.sequoialab.net:11920/SAMPLE" user="jifeng"     password="jifeng"></writeHost>
             </dataHost>
    
          <dataHost name="oracle1" maxCon="1000" minCon="1" balance="0" writeType="0"     dbType="oracle" dbDriver="jdbc"> <heartbeat>select 1 from dual</heartbeat>
            <connectionInitSql>alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss'</connectionInitSql>
            <writeHost host="hostM1" url="jdbc:oracle:thin:@127.0.0.1:1521:nange" user="base"     password="123456" > </writeHost> </dataHost>
    
            <dataHost name="jdbchost" maxCon="1000"     minCon="1" balance="0" writeType="0" dbType="mongodb" dbDriver="jdbc">
            <heartbeat>select     user()</heartbeat>
            <writeHost host="hostM" url="mongodb://192.168.0.99/test" user="admin" password="123456" ></writeHost> </dataHost>
    
            <dataHost name="sparksql" maxCon="1000" minCon="1" balance="0" dbType="spark" dbDriver="jdbc">
            <heartbeat> </heartbeat>
             <writeHost host="hostM1" url="jdbc:hive2://feng01:10000" user="jifeng"     password="jifeng"></writeHost> </dataHost> -->
    
        <!-- <dataHost name="jdbchost" maxCon="1000" minCon="10" balance="0" dbType="mysql"
            dbDriver="jdbc"> <heartbeat>select user()</heartbeat> <writeHost host="hostM1"
            url="jdbc:mysql://localhost:3306" user="root" password="123456"> </writeHost>
            </dataHost> -->
    </mycat:schema>
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  • 原文地址:https://www.cnblogs.com/linjiqin/p/7880206.html
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