数据库系列课程（06）-MyCat分片按省操作数据库例子

guangdong=0
beijing=1
zhejiang=2

<?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:rule SYSTEM "rule.dtd">
<mycat:rule xmlns:mycat="http://io.mycat/">
    <tableRule name="role2">
             <rule>
                  <columns>name</columns>
                  <algorithm>hash-int</algorithm>
              </rule>
    </tableRule>
  <function name="hash-int" class="io.mycat.route.function.PartitionByFileMap">
    <property name="mapFile">partition-hash-int.txt</property>
    <property name="type">1</property>
    <property name="defaultNode">3</property>
  </function>
</mycat:rule>

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
    <!-- TESTDB1 是mycat的逻辑库名称，链接需要用的 -->
    <schema name="mycat_testdb" checkSQLschema="false" sqlMaxLimit="100" dataNode="dn1">
    <table name="intro_db"  dataNode="dn1,dn2,dn3,dn4" rule="role2" /> 
  </schema>
    <!-- database 是MySQL数据库的库名 -->
    <dataNode name="dn1" dataHost="localhost1" database="gd_db" />
  <dataNode name="dn2" dataHost="localhost1" database="bj_db" />
  <dataNode name="dn3" dataHost="localhost1" database="zj_db" />
  <dataNode name="dn4" dataHost="localhost1" database="other_db" />
    <!--
    dataNode节点中各属性说明：
      name：指定逻辑数据节点名称；
      dataHost：指定逻辑数据节点物理主机节点名称；
      database：指定物理主机节点上。如果一个节点上有多个库，可使用表达式db$0-99，     表示指定0-99这100个数据库；
   -->
    <dataHost name="localhost1" maxCon="1000" minCon="10" balance="3" writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- 可以配置多个主从 -->
        <writeHost host="hostM1" url="192.168.162.132:3306" user="root" password="123456">
            <!-- 可以配置多个从库 -->
            <readHost host="hostS2" url="192.168.162.133:3306" user="root" password="123456" />
        </writeHost>
    </dataHost>
 <!--
  dataHost 节点中各属性说明：
        name：物理主机节点名称；
        maxCon：指定物理主机服务最大支持1000个连接；
        minCon：指定物理主机服务最小保持10个连接；
        writeType：指定写入类型；
            0，只在writeHost节点写入；
            1，在所有节点都写入。慎重开启，多节点写入顺序为默认写入根据配置顺序，第一个挂掉切换另一个；
        dbType：指定数据库类型；
        dbDriver：指定数据库驱动；
        balance：指定物理主机服务的负载模式。
            0，不开启读写分离机制；
            1，全部的readHost与stand by writeHost参与select语句的负载均衡，简单的说，当双主双从模式(M1->S1，M2->S2，并且M1与 M2互为主备)，正常情况下，M2,S1,S2都参与select语句的负载均衡；
            2，所有的readHost与writeHost都参与select语句的负载均衡，也就是说，当系统的写操作压力不大的情况下，所有主机都可以承担负载均衡；
 -->
</mycat:schema>

<?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://io.mycat/">
   <!-- 读写都可用的用户 -->
    <user name="root" defaultAccount="true">
        <property name="password">123456</property>
        <property name="schemas">mycat_testdb</property>
        <!-- 表级 DML 权限设置 -->
        <!--        
        <privileges check="false">
            <schema name="TESTDB" dml="0110" >
                <table name="tb01" dml="0000"></table>
                <table name="tb02" dml="1111"></table>
            </schema>
        </privileges>       
         -->
    </user>
    <!-- 只读用户 -->
    <user name="user">
        <property name="password">user</property>
        <property name="schemas">mycat_testdb</property>
        <property name="readOnly">true</property>
    </user>
</mycat:server>

./mycat start

insert into intro_tb (name,createTime) VALUES ('guangdong','2019-12-23 15:00:00');

insert into intro_tb (name,createTime) VALUES ('beijing','2019-12-23 15:15:00');