mycat分库

1. 示意图

   [外链图片转存失败(img-KwEgQ1Yi-1568967951575)(http://yum.sieracpack.com:91/mycat.jpg)]

2. mycat规则制定

   schema.xml

   
   <?xml version="1.0"?>
   <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
   <mycat:schema xmlns:mycat="http://io.mycat/">
   
   <schema name="logicdb" checkSQLschema="false" >
    <!-- 制定分片规则 -->
    <table primaryKey="id" name="code_data" dataNode="dn1,dn2,dn3,dn4,dn5" rule="sharding-by-date" />
    <!-- type=global:定义全局表,用于不变化或少量变化的的表数据,所有分库都一致-->
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="code_data_batch_report" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="code_data_import_error" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="code_data_upload_moa" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="code_data_upload_moa_record" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="code_data_upload_record" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="create_code_bag" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="create_code_base" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="distributor" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="error_moa_code_data" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="factory" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="product" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="production_task" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="query_report" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="query_report_detail" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="query_report_security" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="query_report_security_detail" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="rdc_user" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="rdc_warehouse" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="storage_data" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="storage_data_error" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="storage_data_upload_record" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="sys_dict" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="sys_param" />
    <table primaryKey="id" type="global" dataNode="dn1,dn2,dn3,dn4,dn5" name="sys_user" />
   </schema>
   
   <dataNode name="dn1" dataHost="host" database="tom1" />
   <dataNode name="dn2" dataHost="host" database="tom2" />
   <dataNode name="dn3" dataHost="host" database="tom3" />
   <dataNode name="dn4" dataHost="host" database="tom4" />
   <dataNode name="dn5" dataHost="host" database="tom5" />
   
   
   <dataHost name="host" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native">
     <heartbeat>select 1</heartbeat>
     <writeHost host="hostM1" url="192.168.1.226:3308" user="root" password="sierac1q2w3e" />
   </dataHost>
   
   </mycat:schema>
   

   server.xml

   <!-- db user -->
   <user name="root">
     <property name="password">sierac1q2w3e</property>
     <!-- 逻辑库,与schema.xml中name对应 -->
     <property name="schemas">logicdb</property>
   </user>
   
   

   rule.xml

   <!-- 按照日期分片,与schema.xml中逻辑表code_data的rule对应 -->
   <tableRule name="sharding-by-date">
      <rule>
        <columns>create_date</columns>
        <algorithm>sharding-by-date</algorithm>
      </rule>
    </tableRule>
    
    <!-- 对应的分片函数,开始日期代表从哪天开始循环写入-->
    <function name="sharding-by-date" class="io.mycat.route.function.PartitionByDate">
      <property name="dateFormat">yyyy-MM-dd</property>
      <property name="sBeginDate">2018-01-03</property>
      <!-- 如果配置了 sEndDate 则代表数据达到了这个日期的分片后,循环从开始分片插入,分片可以理解为整个规则db1-dbn -->
      <property name="sEndDate">2018-01-07</property>
      <!-- 1天一个分区,一个分区可以理解为一个db schema-->
      <property name="sPartionDay">1</property>
    </function>