Mycat（Windows环境）（1）初入门

Mycat 是SQL集群中间件，基于阿里开源的Cobar产品而研发，Cobar的稳定性、可靠性、优秀的架构和性能

1. MyCat准备

安装 mysql

这里写图片描述

安装jdk 1.8
1. 这是 jdk 下载地址.
2. 安装完成，配好环境变量

这里写图片描述

下载maycat
1. 这是 mycat 下载地址.
2. mycat 下载目录

这里写图片描述

2. 数据库准备

这里写图片描述


create database db1; 

 CREATE TABLE users (  
    id INT NOT NULL AUTO_INCREMENT,  
    username varchar(32) NOT NULL default '',  
        passwork varchar(32) NOT NULL default '',
    time DATETIME NOT NULL default '1971-01-01 01:00:00',  
    PRIMARY KEY (id)  
)AUTO_INCREMENT= 1 ENGINE=InnoDB DEFAULT CHARSET=utf8;  

create database db2;  
 CREATE TABLE orders (  
    id INT NOT NULL AUTO_INCREMENT,  
    oid varchar(32) NOT NULL default '', 
        money decimal(19,4) NOT NULL default 0,
        state TINYINT NOT NULL default 0,
    time DATETIME NOT NULL default '1971-01-01 01:00:00',  
    PRIMARY KEY (id)  
)AUTO_INCREMENT= 1 ENGINE=InnoDB DEFAULT CHARSET=utf8; 

create database db3; 
CREATE TABLE orders (  
    id INT NOT NULL AUTO_INCREMENT,  
    oid varchar(32) NOT NULL default '', 
        money decimal(19,4) NOT NULL default 0,
        state TINYINT NOT NULL default 0,
    time DATETIME NOT NULL default '1971-01-01 01:00:00',  
    PRIMARY KEY (id)  
)AUTO_INCREMENT= 1 ENGINE=InnoDB DEFAULT CHARSET=utf8;

3. MyCat配置

MyCat配置官方文档.

mycat 的配置文件在conf下:

这里写图片描述

为实现下图：

这里写图片描述

配置如下：

server.xml


<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE mycat:server SYSTEM "server.dtd">  
<mycat:server xmlns:mycat="http://io.mycat/">  
        <system> 
                <property name="defaultSqlParser">druidparser</property>  
                <property name="mutiNodeLimitType">1</property>  
                <property name="serverPort">8066</property>    
                <property name="managerPort">9066</property>   
        </system>  
        <!-- mycat 的用户名,密码,数据库  -->  
        <user name="test">  
                <property name="password">123456</property>  
                <property name="schemas">JGDB</property>  
        </user>  

        <user name="user">  
                <property name="password">123456</property>  
                <property name="schemas">JGDB</property>  
                <property name="readOnly">true</property>  
        </user>  
</mycat:server>

rule.xml


<?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="order_rule">
        <rule>
            <columns>id</columns>
            <algorithm>mod-long</algorithm>
        </rule>
    </tableRule>

    <function name="mod-long" class="io.mycat.route.function.PartitionByMod">
        <!-- how many data nodes -->
        <property name="count">2</property>
    </function>
</mycat:rule>

schema.xml


<?xml version="1.0"?>  
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">  
<mycat:schema xmlns:mycat="http://io.mycat/">  

    <!-- 设置表的存储方式.schema name="JGDB" 与 server.xml中的 JGDB 设置一致  -->  
    <schema name="JGDB" checkSQLschema="false" sqlMaxLimit="100">  
        <table name="users" primaryKey="id"  dataNode="db1" />  
        <table name="orders" primaryKey="id" dataNode="db2,db3" rule="order_rule" />  

    </schema>  

    <!-- 设置dataNode 对应的数据库,及 mycat 连接的地址dataHost -->  
    <dataNode name="db1" dataHost="host1" database="db1" />  
    <dataNode name="db2" dataHost="host1" database="db2" />  
    <dataNode name="db3" dataHost="host1" database="db3" />  

    <!-- mycat 逻辑主机dataHost对应的物理主机.其中也设置对应的mysql登陆信息 -->  
    <dataHost name="host1" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native">  
            <heartbeat></heartbeat>  
            <writeHost host="server1" url="127.0.0.1:3306" user="root" password="xinfu978"/>  
    </dataHost> 

</mycat:schema>