Windows环境Mycat数据库分库分表中间件部署

时间：2022-01-10 04:12:10

Windows环境Mycat数据库分库分表中间件部署

标签： 数据库中间件mycat分布式集群
2016-08-23 00:17  957人阅读  评论(0)  收藏  举报
Windows环境Mycat数据库分库分表中间件部署  分类：

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目录(?)[+]

下载地址MYCAT官方网站

jdk安装配置

  1. 首先去oracle官网下载并安装jdk8,添加环境变量，JAVA_HOME设置为D:\Worksoftware\Java\jdk1.8
  2. CLASSPATH设置为.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
  3. path系统变量追加%JAVA_HOME%\bin;

Mycat安装配置

  1. 首先添加Windows环境变量，MYCAT_HOME设置为安装目录E:\WorkSoftWare\MycatServer1.5

  2. 为了降低资源占用，mycat的jvm设置在startup_nowrap.bat，打开后可以清楚看到如下配置： 
    “%JAVA_CMD%” -server -Xms1G -Xmx2G -XX:MaxPermSize=64M -XX:+AggressiveOpts -XX:MaxDirectMemorySize=1G -DMYCAT_HOME=%MYCAT_HOME% -cp “..\conf;..\lib*” io.mycat.MycatStartup 
    这里将-Xms1G改成-Xms512M，-Xmx2G改成-Xmx1024M，保存后重新启动即可.

  3. wrapper.conf文件里的改成wrapper.java.command=E:\WorkSoftWare\jdk1.8\bin\java.exe

Mycat启动的配置

schema.xml配置文件，如果分库在不同的服务器，可以配置两个datahost；如果在一个datahost中配置多个writeHost，则为主从配置。type=”global”时，为全局表

?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://org.opencloudb/" > <!--在这一行参数里面,schema name定义了可以在MyCAT前端显示的逻辑数据库的名字,checkSQLschema这个参数为False的时候,表明MyCAT会自动忽略掉表名前的数据库名,比如说mydatabase1.test1,会被当做test1;sqlMaxLimit指定了SQL语句返回的行数限制--> <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100"> <!-- 主键范围规则 --> <!-- 这一行代表在MyCAT前端会显示哪些表名,类似几行都代表一样的意思,这里强调的是表,而MyCAT并不会在配置文件里面定义表结构，如果在前端使用show create table ,MyCAT会显示正常的表结构信息,观察Debug日志,可以看到,MyCAT把命令分发给了dn1代表的数据库,然后把dn1的查询结果返回给了前端 可以判断,类似的数据库级别的一些查询指令,有可能是单独分发给某个节点,然后再把某个节点的信息返回给前端。 dataNode的意义很简单,这个逻辑表的数据存储在后端的哪几个数据库里面rule代表的是这个逻辑表students的具体切分策略,目前MyCAT只支持按照某一个特殊列,遵循一些特殊的规则来切分,如取模,枚举等,具体的留给之后细说 --> <table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" /> <table name="company" primaryKey="ID" dataNode="dn3,dn2,dn1" rule="mod-long"/> <table name="goods" primaryKey="ID" type="global" dataNode="dn1,dn2" /> <!--求模分片随机规则 --> <table name="hotnews" primaryKey="ID" dataNode="dn1,dn2,dn3" rule="mod-long" /> <table name="employee" primaryKey="ID" dataNode="dn1,dn2" rule="sharding-by-intfile" /> <table name="customer" primaryKey="ID" dataNode="dn1,dn2" rule="sharding-by-intfile"> <!-- childtable我在测试中并没有实际用起来不过在MyCAT的设计文档里面有提到，childtable是一种依赖于父表的结构， 这意味着，childtable的joinkey会按照父表的parentKey的策略一起切分，当父表与子表进行连接， 且连接条件是childtable.joinKey=parenttable.parentKey时,不会进行跨库的连接. --> <childTable name="orders" primaryKey="ID" joinKey="customer_id" parentKey="id"> <childTable name="order_items" joinKey="order_id" parentKey="id" /> </childTable> <childTable name="customer_addr" primaryKey="ID" joinKey="customer_id" parentKey="id" /> </table> <!-- 全局表是自动克隆到所有定义的数据节点，这样可以与拆分节点的任何表连接查询，是在同一个数据节点--> <table name="news_table" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /> </schema> <dataNode name="dn1" dataHost="localhost1" database="mycatDB1" /> <dataNode name="dn2" dataHost="localhost1" database="mycatDB2" /> <dataNode name="dn3" dataHost="localhost1" database="mycatDB3" /> <!-- dataHost配置的是实际的后端数据库集群,大部分参数简单易懂,这里就不一个个介绍了,只介绍比较重要的两个参数,writeType和balance. --> <!-- writeType和balance是用来控制后端集群的读写分离的关键参数，这里我用了双主双从的集群配置 这里的测试过程比较麻烦，所以直接贴结论： 1.balance=0时,读操作都在localhost上(localhost失败时,后端直接失败) 2.balance=1时,读操作会随机分散在localhost1和两个readhost上面(localhost失败时,写操作会在localhost1,如果localhost1再失败,则无法进行写操作) 3.balance=2时,写操作会在localhost上，读操作会随机分散在localhost1,localhost1和两个readhost上面(同上) 4.writeType=0时,写操作会在localhost上,如果localhost失败,会自动切换到localhost1,localhost恢复以后并不会切换回localhost进行写操作 5.writeType=1时,写操作会随机分布在localhost和localhost1上,单点失败并不会影响集群的写操作,但是后端的从库会无法从挂掉的主库获取更新,会在读数据的时候出现数据不一致 举例:localhost失败了,写操作会在localhost1上面进行,localhost1的主从正常运行,但是localhost的从库无法从localhost获取更新,localhost的从库于其他库出现数据不一致 --> <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"> <heartbeat> select user() </heartbeat> <!-- can have multi write hosts --> <writeHost host="hostM1" url="localhost:3306" user="root" password="123456"> <!-- can have multi read hosts --> <!--<readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />--> </writeHost> </dataHost> </mycat:schema> 
<span class="hljs-pi" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><?xml version="1.0"?></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></span><span class="hljs-doctype" style="color: rgb(102, 0, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!DOCTYPE mycat:schema SYSTEM "schema.dtd"></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">mycat:schema</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">xmlns:mycat</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"http://org.opencloudb/"</span> ></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!--在这一行参数里面,schema name定义了可以在MyCAT前端显示的逻辑数据库的名字,checkSQLschema这个参数为False的时候,表明MyCAT会自动忽略掉表名前的数据库名,比如说mydatabase1.test1,会被当做test1;sqlMaxLimit指定了SQL语句返回的行数限制--></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">schema</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"TESTDB"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">checkSQLschema</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"false"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">sqlMaxLimit</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"100"</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!-- 主键范围规则 --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!-- 这一行代表在MyCAT前端会显示哪些表名,类似几行都代表一样的意思,这里强调的是表,而MyCAT并不会在配置文件里面定义表结构，如果在前端使用show create table ,MyCAT会显示正常的表结构信息,观察Debug日志,可以看到,MyCAT把命令分发给了dn1代表的数据库,然后把dn1的查询结果返回给了前端 可以判断,类似的数据库级别的一些查询指令,有可能是单独分发给某个节点,然后再把某个节点的信息返回给前端。        dataNode的意义很简单,这个逻辑表的数据存储在后端的哪几个数据库里面rule代表的是这个逻辑表students的具体切分策略,目前MyCAT只支持按照某一个特殊列,遵循一些特殊的规则来切分,如取模,枚举等,具体的留给之后细说                              --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">         </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"travelrecord"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1,dn2,dn3"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">rule</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"auto-sharding-long"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"company"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn3,dn2,dn1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">rule</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mod-long"</span>/></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"goods"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">type</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"global"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1,dn2"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!--求模分片随机规则 --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"hotnews"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1,dn2,dn3"</span>            <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">rule</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mod-long"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"employee"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1,dn2"</span>            <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">rule</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"sharding-by-intfile"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"customer"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1,dn2"</span>            <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">rule</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"sharding-by-intfile"</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">             </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!--                 childtable我在测试中并没有实际用起来不过在MyCAT的设计文档里面有提到，childtable是一种依赖于父表的结构，                这意味着，childtable的joinkey会按照父表的parentKey的策略一起切分，当父表与子表进行连接，                且连接条件是childtable.joinKey=parenttable.parentKey时,不会进行跨库的连接.                --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">             </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">childTable</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"orders"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">joinKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"customer_id"</span>                <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">parentKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"id"</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">                </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">childTable</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"order_items"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">joinKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"order_id"</span>                    <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">parentKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"id"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">            </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">childTable</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">            </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">childTable</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"customer_addr"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">joinKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"customer_id"</span>                <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">parentKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"id"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!-- 全局表是自动克隆到所有定义的数据节点，这样可以与拆分节点的任何表连接查询，是在同一个数据节点--></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">table</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"news_table"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">primaryKey</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ID"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">type</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"global"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataNode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1,dn2,dn3"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">schema</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">dataNode</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataHost</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"localhost1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">database</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mycatDB1"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">dataNode</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn2"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataHost</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"localhost1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">database</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mycatDB2"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">dataNode</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"dn3"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dataHost</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"localhost1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">database</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mycatDB3"</span> /></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!--          dataHost配置的是实际的后端数据库集群,大部分参数简单易懂,这里就不一个个介绍了,只介绍比较重要的两个参数,writeType和balance.         --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">         </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!-- writeType和balance是用来控制后端集群的读写分离的关键参数，这里我用了双主双从的集群配置            这里的测试过程比较麻烦，所以直接贴结论：           1.balance=0时,读操作都在localhost上(localhost失败时,后端直接失败)           2.balance=1时,读操作会随机分散在localhost1和两个readhost上面(localhost失败时,写操作会在localhost1,如果localhost1再失败,则无法进行写操作)           3.balance=2时,写操作会在localhost上，读操作会随机分散在localhost1,localhost1和两个readhost上面(同上)           4.writeType=0时,写操作会在localhost上,如果localhost失败,会自动切换到localhost1,localhost恢复以后并不会切换回localhost进行写操作           5.writeType=1时,写操作会随机分布在localhost和localhost1上,单点失败并不会影响集群的写操作,但是后端的从库会无法从挂掉的主库获取更新,会在读数据的时候出现数据不一致           举例:localhost失败了,写操作会在localhost1上面进行,localhost1的主从正常运行,但是localhost的从库无法从localhost获取更新,localhost的从库于其他库出现数据不一致         --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">     </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">dataHost</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"localhost1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">maxCon</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"1000"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">minCon</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"10"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">balance</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"0"</span>        <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">writeType</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"0"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dbType</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"mysql"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">dbDriver</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"native"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">switchType</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"1"</span>  <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">slaveThreshold</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"100"</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">heartbeat</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">select user()</span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">heartbeat</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!-- can have multi write hosts --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">writeHost</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">host</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"hostM1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">url</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"localhost:3306"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">user</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"root"</span>            <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">password</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"123456"</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">            </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!-- can have multi read hosts --></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">            </span><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"><!--<readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" />--></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">        </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">writeHost</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);">    </span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">dataHost</span>></span><span style="color: rgb(51, 51, 51); font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></span><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box; font-family: 'Source Code Pro', monospace; font-size: 14px; line-height: 20.2999992370605px; white-space: pre; background-color: rgba(128, 128, 128, 0.0470588);"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">mycat:schema</span>></span>

<?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:server SYSTEM "server.dtd"><mycat:serverxmlns:mycat="http://org.opencloudb/"><system><propertyname="defaultSqlParser">druidparser</property><!-- <property name="useCompression">1</property>--><!--1为开启mysql压缩协议--><!-- <property name="processorBufferChunk">40960</property> --><!-- <property name="processors">1</property> <property name="processorExecutor">32</property> --><!--默认是65535 64K 用于sql解析时最大文本长度 --><!--<property name="maxStringLiteralLength">65535</property>--><!--<property name="sequnceHandlerType">0</property>--><!--<property name="backSocketNoDelay">1</property>--><!--<property name="frontSocketNoDelay">1</property>--><!--<property name="processorExecutor">16</property>--><!-- <property name="mutiNodeLimitType">1</property> 0：开启小数量级（默认） ；1：开启亿级数据排序 <property name="mutiNodePatchSize">100</property> 亿级数量排序批量 <property name="processors">32</property> <property name="processorExecutor">32</property> <property name="serverPort">8066</property> <property name="managerPort">9066</property> <property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> <property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> --></system><username="test"><!--用户名--><propertyname="password">test</property><!--密码--><!--实例名，和schema.xml定义的schema对应，这里的实例名是虚拟名，也就是对mycat服务的一种别名，是应用程序以及客户端连接的入口。--><propertyname="schemas">TESTDB</property></user><username="user"><propertyname="password">user</property><propertyname="schemas">TESTDB</property><propertyname="readOnly">true</property></user><!-- <quarantine> <whitehost> <host host="127.0.0.1" user="mycat"/> <host host="127.0.0.2" user="mycat"/> </whitehost> <blacklist check="false"></blacklist> </quarantine> --></mycat:server>

rule.xml配置文

<?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:rulexmlns:mycat="http://org.opencloudb/"> <tableRulename="rule1"> <rule> <columns> id </columns> <algorithm> func1 </algorithm> </rule> </tableRule> <tableRulename="rule2"> <rule> <columns> user_id </columns> <algorithm> func1 </algorithm> </rule> </tableRule> <tableRulename="sharding-by-intfile"> <rule> <columns> sharding_id </columns> <algorithm> hash-int </algorithm> </rule> </tableRule> <tableRulename="auto-sharding-long"> <rule> <columns> id </columns> <algorithm> rang-long </algorithm> </rule> </tableRule> <tableRulename="mod-long"> <rule> <columns> id </columns> <algorithm> mod-long </algorithm> </rule> </tableRule> <tableRulename="sharding-by-murmur"> <rule> <columns> id </columns> <algorithm> murmur </algorithm> </rule> </tableRule> <tableRulename="sharding-by-month"> <rule> <columns> create_date </columns> <algorithm> partbymonth </algorithm> </rule> </tableRule> <tableRulename="latest-month-calldate"> <rule> <columns> calldate </columns> <algorithm> latestMonth </algorithm> </rule> </tableRule> <tableRulename="auto-sharding-rang-mod"> <rule> <columns> id </columns> <algorithm> rang-mod </algorithm> </rule> </tableRule> <tableRulename="jch"> <rule> <columns> id </columns> <algorithm> jump-consistent-hash </algorithm> </rule> </tableRule> <functionname="murmur"class="org.opencloudb.route.function.PartitionByMurmurHash"> <propertyname="seed"> 0 </property> <!-- 默认是0 --> <propertyname="count"> 2 </property> <!-- 要分片的数据库节点数量，必须指定，否则没法分片 --> <propertyname="virtualBucketTimes"> 160 </property> <!-- 一个实际的数据库节点被映射为这么多虚拟节点，默认是160倍，也就是虚拟节点数是物理节点数的160倍 --> <!-- <property name="weightMapFile">weightMapFile</property> 节点的权重，没有指定权重的节点默认是1。以properties文件的格式填写，以从0开始到count-1的整数值也就是节点索引为key，以节点权重值为值。所有权重值必须是正整数，否则以1代替 --> <!-- <property name="bucketMapPath">/etc/mycat/bucketMapPath</property> 用于测试时观察各物理节点与虚拟节点的分布情况，如果指定了这个属性，会把虚拟节点的murmur hash值与物理节点的映射按行输出到这个文件，没有默认值，如果不指定，就不会输出任何东西 --> </function> <functionname="hash-int"class="org.opencloudb.route.function.PartitionByFileMap"> <propertyname="mapFile"> partition-hash-int.txt </property> </function> <functionname="rang-long"class="org.opencloudb.route.function.AutoPartitionByLong"> <propertyname="mapFile"> autopartition-long.txt </property> </function> <functionname="mod-long"class="org.opencloudb.route.function.PartitionByMod"> <!-- how many data nodes --> <propertyname="count"> 3 </property> </function> <functionname="func1"class="org.opencloudb.route.function.PartitionByLong"> <propertyname="partitionCount"> 8 </property> <propertyname="partitionLength"> 128 </property> </function> <functionname="latestMonth"class="org.opencloudb.route.function.LatestMonthPartion"> <propertyname="splitOneDay"> 24 </property> </function> <functionname="partbymonth"class="org.opencloudb.route.function.PartitionByMonth"> <propertyname="dateFormat"> yyyy-MM-dd </property> <propertyname="sBeginDate"> 2015-01-01 </property> </function> <functionname="rang-mod"class="org.opencloudb.route.function.PartitionByRangeMod"> <propertyname="mapFile"> partition-range-mod.txt </property> </function> <functionname="jump-consistent-hash"class="org.opencloudb.route.function.PartitionByJumpConsistentHash"> <propertyname="totalBuckets"> 3 </property> </function> </mycat:rule>

Mycat连接mysql示例


cmd命令运行: 
Windows环境Mycat数据库分库分表中间件部署 
结果: 
Windows环境Mycat数据库分库分表中间件部署

Mycat连接mysql结果

Windows环境Mycat数据库分库分表中间件部署 
Windows环境Mycat数据库分库分表中间件部署 
上图上面的mycatdb1,mycatdb2,mycatdb3数据库是真实物理数据库，TESTDB是中间件逻辑数据库，此时已经所有工作都准备好。

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