MySQL数据库实践学习(八)

2022-10-26 13:24:49 浏览数 (1)

3.3.3 配置

1). schema.xml

在schema.xml中配置逻辑库、逻辑表、数据节点、节点主机等相关信息。具体的配置如下:

代码语言:javascript复制
<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
<schema name="DB01" checkSQLschema="true" sqlMaxLimit="100">
<table name="TB_ORDER" dataNode="dn1,dn2,dn3" rule="auto-sharding-long"
/>
</schema>
<dataNode name="dn1" dataHost="dhost1" database="db01" />
<dataNode name="dn2" dataHost="dhost2" database="db01" />
<dataNode name="dn3" dataHost="dhost3" database="db01" />
<dataHost name="dhost1" maxCon="1000" minCon="10" balance="0"
writeType="0" dbType="mysql" dbDriver="jdbc" switchType="1"
slaveThreshold="100">
<heartbeat>select user()</heartbeat>
<writeHost host="master" url="jdbc:mysql://192.168.200.210:3306?
useSSL=false&amp;serverTimezone=Asia/Shanghai&amp;characterEncoding=utf8"
user="root" password="1234" />
</dataHost>
<dataHost name="dhost2" maxCon="1000" minCon="10" balance="0"
writeType="0" dbType="mysql" dbDriver="jdbc" switchType="1"
slaveThreshold="100">
<heartbeat>select user()</heartbeat>
<writeHost host="master" url="jdbc:mysql://192.168.200.213:3306?
useSSL=false&amp;serverTimezone=Asia/Shanghai&amp;characterEncoding=utf8"
user="root" password="1234" />
</dataHost>
<dataHost name="dhost3" maxCon="1000" minCon="10" balance="0"
writeType="0" dbType="mysql" dbDriver="jdbc" switchType="1"
slaveThreshold="100">
<heartbeat>select user()</heartbeat>
<writeHost host="master" url="jdbc:mysql://192.168.200.214:3306?
useSSL=false&amp;serverTimezone=Asia/Shanghai&amp;characterEncoding=utf8"
user="root" password="1234" />
</dataHost>
</mycat:schema>

2). server.xml

需要在server.xml中配置用户名、密码,以及用户的访问权限信息,具体的配置如下:

代码语言:javascript复制
<user name="root" defaultAccount="true">
<property name="password">123456</property>
<property name="schemas">DB01</property>
<!-- 表级 DML 权限设置 -->
<!--
<privileges check="true">
<schema name="DB01" dml="0110" >
<table name="TB_ORDER" dml="1110"></table>
</schema>
</privileges>
-->
</user>
<user name="user">
<property name="password">123456</property>
<property name="schemas">DB01</property>
<property name="readOnly">true</property>
</user>

上述的配置表示,定义了两个用户 root 和 user ,这两个用户都可以访问 DB01 这个逻辑库,访问密码都是123456,但是root用户访问DB01逻辑库,既可以读,又可以写,但是 user用户访问DB01逻辑库是只读的。

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