MyCAT基础概念

1.数据源：MyCAT用于连接后端的MySQL数据库，连接信息

   用户名、密码、IP

   datasources：设置数据源

2.MyCAT集群设置：对后端MySQL进行组合设置，例如主、从、只读、读写、分库、分表

   clusters：设置集群

3.MyCAT用户设置:users

4.MyCAT逻辑库设置：schemas

  #mycat注释指令：

 ①清空所有配置：/*+ mycat:resetConfig{} */

 ②创建mycat用户

 /*+ mycat:createUser{

       "username":"user",

        "password":"",

         "ip":"127.0.0.1",

         "transactionType":"xa"}

*/

③查看mycat的用户：/*+ mycat:showUsers*/

④ 创建数据源

/*+ mycat:createDataSource{"dbType":"mysql","idleTimeout":60000,"initSqls":[],"initSqlsGetConnection":true,"instanceType":"READ_WRITE","maxCon":1000,"maxConnectTimeout":3000,"maxRetryCount":5,"minCon":1,"name":"dc1","password":"root123","type":"JDBC","url":"jdbc:mysql://127.0.0.1:3306?useUnicode=true&serverTimezone=UTC&characterEncoding=UTF-8","user":"root","weight":0}
*/

查看数据源：/*+ mycat:showDataSources{} */