MySQL 分库分表 dble简单使用

一、运行环境

Host Name	IP	DB	Mod
data0	172.16.100.170	mysql
data1	172.16.100.171	mysql
data2	172.16.100.172	mysql

二、安装dble

1、上传安装dble

需要Java环境，1.8及以上版本

直接解压dble即可

2、dble结构如下

三、配置dble

配置文件放在conf目录下

1、配置server.xml 全局信息

cp server_template.xml server.xml

[root@data0 conf]# cat server.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dble:server SYSTEM "server.dtd">
<dble:server xmlns:dble="http://dble.cloud/" version="1.0">
    <system>
        <property name="serverPort">8066</property>       ##操作MySQL端口
        <property name="managerPort">9066</property>   ##管理MySQL端口
    </system>

    <!-- firewall config -->
    <!--
    <firewall>
    <whitehost>
          <host host="127.0.0.1" user="root"/>
          <host host="0:0:0:0:0:0:0:1" user="root"/>
       </whitehost>
       <blacklist check="true">
       <property name="selelctAllow">false</property>
       </blacklist>
    </firewall>
    -->
    <user name="man1">    ##管理用户以及登陆密码，并且不能设置schema
        <property name="password">654321</property>
        <property name="manager">true</property>
        <!-- manager user can't set schema-->
    </user>

    <user name="test">    ##操作用户以及密码
        <property name="password">123456</property>
        <property name="schemas">testdb</property>
    </user>
</dble:server>
[root@data0 conf]#

2、配置schema.xml 分片信息

cp schema_template.xml schema.xml

[root@data0 conf]# cat schema.xml
<?xml version="1.0"?>
<!DOCTYPE dble:schema SYSTEM "schema.dtd">
<dble:schema xmlns:dble="http://dble.cloud/" version="1.0">

    <schema name="testdb">
        <table name="users" primaryKey="ID" dataNode="dn1,dn2,dn3" rule="sharding-by-mod2"/>
    </schema>

    <dataNode name="dn1" dataHost="data0" database="testdb1"/>
    <dataNode name="dn2" dataHost="data1" database="testdb2"/>
    <dataNode name="dn3" dataHost="data2" database="testdb3"/>

    <dataHost name="data0" maxCon="1000" minCon="10" balance="0" switchType="-1" slaveThreshold="100">
        <heartbeat>show slave status</heartbeat>
        <writeHost host="data0" url="172.16.100.170:14014" user="test" password="123456">
        </writeHost>
    </dataHost>
    <dataHost name="data1" maxCon="1000" minCon="10" balance="0" switchType="-1" slaveThreshold="100">
        <heartbeat>show slave status</heartbeat>
        <writeHost host="data1" url="172.16.100.171:14015" user="test" password="123456">
        </writeHost>
    </dataHost>
    <dataHost name="data2" maxCon="1000" minCon="10" balance="0" switchType="-1" slaveThreshold="100">
            <heartbeat>show slave status</heartbeat>
        <writeHost host="data2" url="172.16.100.172:14016" user="test" password="123456">
        </writeHost>
    </dataHost>

</dble:schema>
[root@data0 conf]#

3、配置rule.xml 分片规则

cp rule_template.xml rule.xml

[root@data0 conf]# cat rule.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dble:rule SYSTEM "rule.dtd">
<dble:rule xmlns:dble="http://dble.cloud/" version="1.0">

    <tableRule name="sharding-by-mod2">
        <rule>
            <columns>id</columns>
            <algorithm>hashmod2</algorithm>
        </rule>
    </tableRule>

    <function name="hashmod2" class="Hash">
       <property name="partitionCount">3</property>
       <property name="partitionLength">1</property>
    </function>

</dble:rule>
[root@data0 conf]#

四、登陆验证

mysql -utest -p123456 -P8066 -h127.0.0.1 testdb