MyCAT在Windows 10环境下安装和启动

﹏ヽ暗。殇╰゛Y 2023-10-10 13:01 15阅读 0赞

**1、下载**  
从如下地址下载mycat的安装包：

[https://github.com/MyCATApache/Mycat-Server][https_github.com_MyCATApache_Mycat-Server]

eg:Mycat-server-1.6.7.6-release-20210303094759-win.tar.gz

csdn 下载地址:

**2、解压**  
解压下载的安装包

**3、安装**  
安装mycat前需要先安装jdk和mysql。mycat1.6版本建议使用的jdk是1.7以上版本，mysql建议使用5.6版本(我这里使用是MySQL8)。

安装完jdk和mysql后，进入mycat解压目录下的bin目录，如本文的路径如下：

D:\\mycat\\bin

在打开的cmd命令行窗口中，执行如下命令安装mycat(注意需要管理员账户登录，如果不是请使用管理员身份运行cmd打开命令行窗口,执行如下指令会提示报错)：  
mycat.bat install

**4、启动和停止**  
可以使用如下命令启动mycat服务  
mycat.bat start

启动后可以通过如下命令查看mycat的运行状态：  
mycat.bat status

可以使用如下命令停止mycat服务  
mycat.bat stop

eg:

D:\mycat\bin>mycat.bat install
    wrapper  | Mycat-server installed.
    
    D:\mycat\bin>mycat.bat start
    wrapper  | Starting the Mycat-server service...
    wrapper  | Waiting to start...
    wrapper  | Mycat-server started.
    
    D:\mycat\bin>mycat.bat status
    wrapper  | The Mycat-server Service is installed.
    wrapper  |   Start Type: Automatic
    wrapper  |   Interactive: No
    wrapper  |   Running: Yes
    
    D:\mycat\bin>mycat.bat stop
    wrapper  | Stopping the Mycat-server service...
    wrapper  | Mycat-server stopped.
    
    D:\mycat\bin>mycat.bat start
    wrapper  | Starting the Mycat-server service...
    wrapper  | Mycat-server started.
    
    D:\mycat\bin>mycat.bat stop
    wrapper  | Stopping the Mycat-server service...
    wrapper  | Mycat-server stopped.
    
    D:\mycat\bin>mycat.bat start
    wrapper  | Starting the Mycat-server service...
    wrapper  | Mycat-server started.

**5、mycat配置**  
5.1、schema.xml配置文件——修改mycat与mysql的链接信息  
我们打开mycat安装目录，并进入conf目录，打开schema.xml配置文件，schema.xml配置文件是mycat中重要的配置文件之一，它涵盖了mycat的逻辑库、表、分片规则、分批按节点及数据源。这里我们对默认的schema.xml进行简单的修改配置（注意备份一个原始的配置文件），主要配置本机的mysql链接信息。找到dataHost节点，按照当前自己mysql的配置信息来修改配置。如下为我修改后的该部分配置：

<?xml version="1.0"?>
    <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
    <mycat:schema xmlns:mycat="http://io.mycat/">
    	
        
        
        
    	<schema name="TESTDB" checkSQLschema="true" sqlMaxLimit="100" randomDataNode="dn1">
    		
    		
    
    		<table name="test"  dataNode="dn1,dn2,dn3" rule="auto-sharding-long" >
    		</table>
    	</schema>
    	
        
        
    	<dataNode name="dn1" dataHost="localhost1" database="db1" />
    	
    	<dataNode name="dn2" dataHost="localhost1" database="db2" />
    	
    	<dataNode name="dn3" dataHost="localhost1" database="db3" />
    	
    	<dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"
    			  writeType="0" dbType="mysql" dbDriver="jdbc" switchType="1"  slaveThreshold="100">
    		
    		<heartbeat>select user()</heartbeat>
    		
    		<writeHost host="hostM1" url="jdbc:mysql://127.0.0.1?useSSL=false&serverTimezone=UTC&characterEncoding=utf8" user="root"
    				   password="123456">
    		</writeHost>
    	</dataHost>
    	
    </mycat:schema>

重点参数说明：balance和 switchType。

balance指的负载均衡类型，目前的取值有4种：  
1. balance="0", 不开启读写分离机制，所有读操作都发送到当前可用的writeHost上。  
2. balance="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。  
3. balance="2"，所有读操作都随机的在writeHost、readhost上分发。  
4. balance="3"，所有读请求随机的分发到wiriterHost对应的readhost执行，writerHost不负担读压力

switchType指的是切换的模式，目前的取值也有4种：  
1. switchType='-1' 表示不自动切换  
2. switchType='1' 默认值，表示自动切换  
3. switchType='2' 基于MySQL主从同步的状态决定是否切换,心跳语句为 show slave status  
4. switchType='3'基于MySQL galary cluster的切换机制（适合集群）（1.4.1），心跳语句为 show status like 'wsrep%'。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70][]

schema的配置要与安装的mysql有关：  
“2”是你本地mysql的分库名称，  
“3”是你本地mysql的账号密码，  
“1”是mycat和本地mysql表关联配置，table是表名，dataNode就是哪些分库里有test表。我三个分库都有test这张表，所以都配置了。rule是test这张表的执行规则，规则名字是：auto-sharding-long，规则设置在rule.xml里，我们可以去(D:\\mycat\\conf\\rule.xml)看看

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 1][]

搜索标注：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 3][]

在mycat–>conf通过规则文件名找到规则文件：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 4][]

# range start-end ,data node index
    # K=1000,M=10000.
    0-5K=0
    5K-10K=1
    10K-15K=2

其中K代表数字1000，M代表数字10000，文本上显示的内容含义为：id数为0-500\*10000的范围内，数据会分配到第0个分片上，id数为500\*10000-1000\*10000的范围内，数据会分配到第1个分片上，依次类推。

5.2、server.xml文件——配置mycat用户信息

<?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="nonePasswordLogin">0</property> 
    	<property name="ignoreUnknownCommand">0</property>
    	<property name="useHandshakeV10">1</property>
        <property name="removeGraveAccent">1</property>
    	<property name="useSqlStat">0</property>  
    	<property name="useGlobleTableCheck">0</property>  
    	<property name="sqlExecuteTimeout">300</property>  
    		<property name="sequenceHandlerType">1</property>
    	
    	
    	<property name="sequnceHandlerPattern">(?:(\s*next\s+value\s+for\s*MYCATSEQ_(\w+))(,|\)|\s)*)+</property>
    	<property name="subqueryRelationshipCheck">false</property> 
    	<property name="sequenceHanlderClass">io.mycat.route.sequence.handler.HttpIncrSequenceHandler</property>
           
             
    	
    	
            
    		<property name="processorBufferPoolType">0</property>
    		
    		
    		
    		
    		
    		
    		
    		
    		<property name="handleDistributedTransactions">0</property>
    		
    			
    		<property name="useOffHeapForMerge">0</property>
    
    		
            <property name="memoryPageSize">64k</property>
    
    		
    		<property name="spillsFileBufferSize">1k</property>
    
    		<property name="useStreamOutput">0</property>
    
    		
    		<property name="systemReserveMemorySize">384m</property>
    
    
    		
    		<property name="useZKSwitch">false</property>
    
    		
    		
    
    		
    		
    		
    		<property name="strictTxIsolation">false</property>
    		
    		<property name="parallExecute">0</property>
    		<property name="serverBacklog">2048</property>
    	</system>
    	
    	
    	
    	
    	
    	
    	
    	
    	
    
    	<user name="mycat" defaultAccount="true">
    		<property name="password">12345</property>
    		<property name="schemas">TESTDB</property>
    		<property name="defaultSchema">TESTDB</property>
    		
    
    	</user>
    
    
    </mycat:server>

注意：这里的TESTDB的登入用户信息mycat/123456

**6、测试**  
启动成功后，使用navicat连接mycat，新建一个mysql连接，如下图：连接成功，其中8066端口是mycat的默认端口

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 5][]

测试数据：

insert into test(sid,name) VALUES(10, '测试一');
    insert into test(sid,name) VALUES(100, '测试二');
    insert into test(sid,name) VALUES(1000, '测试三');
    insert into test(sid,name) VALUES(10000, '测试四');

![20210621171218351.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 7][]

![20210621171337446.png][]

[https_github.com_MyCATApache_Mycat-Server]: https://github.com/MyCATApache/Mycat-Server
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[20210621171218351.png]: https://img-blog.csdnimg.cn/20210621171218351.png
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[20210621171337446.png]: https://img-blog.csdnimg.cn/20210621171337446.png