MyCat配置运行

2021-11-23 03:00:22

昨天把mycat的环境搭建差不多了，今天直接上配置文件：

主要需要修改三个配置文件：

rule.xml

schema.xml

server.xml

rule.xml配置如图:

<?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="rule1">

<rule>

<columns>id</columns>

<algorithm>func1</algorithm>

</rule>

</tableRule>

<tableRule name="rule2">

<rule>

<columns>user_id</columns>

<algorithm>func1</algorithm>

</rule>

</tableRule>

<tableRule name="sharding-by-intfile">

<rule>

<columns>sharding_id</columns>

<algorithm>hash-int</algorithm>

</rule>

</tableRule>

<tableRule name="auto-sharding-long">

<rule>

<columns>id</columns>

<algorithm>rang-long</algorithm>

</rule>

</tableRule>

<tableRule name="mod-long">

<rule>

<columns>id</columns>

<algorithm>mod-long</algorithm>

</rule>

</tableRule>

<tableRule name="sharding-by-murmur">

<rule>

<columns>id</columns>

<algorithm>murmur</algorithm>

</rule>

</tableRule>

<tableRule name="crc32slot">

<rule>

<columns>id</columns>

<algorithm>crc32slot</algorithm>

</rule>

</tableRule>

<tableRule name="sharding-by-month">

<rule>

<columns>create_time</columns>

<algorithm>partbymonth</algorithm>

</rule>

</tableRule>

<tableRule name="latest-month-calldate">

<rule>

<columns>calldate</columns>

<algorithm>latestMonth</algorithm>

</rule>

</tableRule>

<tableRule name="auto-sharding-rang-mod">

<rule>

<columns>id</columns>

<algorithm>rang-mod</algorithm>

</rule>

</tableRule>

<tableRule name="jch">

<rule>

<columns>id</columns>

<algorithm>jump-consistent-hash</algorithm>

</rule>

</tableRule>

<function name="murmur"

class="io.mycat.route.function.PartitionByMurmurHash">

<property name="seed">0</property><!-- 默认是0 -->

<property name="count">2</property><!-- 要分片的数据库节点数量，必须指定，否则没法分片 -->

<property name="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>

<function name="crc32slot"

  class="io.mycat.route.function.PartitionByCRC32PreSlot">

<property name="count">2</property><!-- 要分片的数据库节点数量，必须指定，否则没法分片 -->

</function>

<function name="hash-int"

class="io.mycat.route.function.PartitionByFileMap">

<property name="mapFile">partition-hash-int.txt</property>

</function>

<function name="rang-long"

class="io.mycat.route.function.AutoPartitionByLong">

<property name="mapFile">autopartition-long.txt</property>

</function>

<function name="mod-long" class="io.mycat.route.function.PartitionByMod">

<!-- how many data nodes -->

<property name="count">3</property>

</function>

<function name="func1" class="io.mycat.route.function.PartitionByLong">

<property name="partitionCount">8</property>

<property name="partitionLength">128</property>

</function>

<function name="latestMonth"

class="io.mycat.route.function.LatestMonthPartion">

<property name="splitOneDay">24</property>

</function>

<function name="partbymonth"

class="io.mycat.route.function.PartitionByMonth">

<property name="dateFormat">yyyy-MM-dd</property>

<property name="sBeginDate">2015-01-01</property>

</function>

<function name="rang-mod" class="io.mycat.route.function.PartitionByRangeMod">

        <property name="mapFile">partition-range-mod.txt</property>

</function>

<function name="jump-consistent-hash" class="io.mycat.route.function.PartitionByJumpConsistentHash">

<property name="totalBuckets">3</property>

</function>

</mycat:rule>

其中最重要的两段：列举使用id分片，分多少片：

 
MyCat配置运行
 
MyCat配置运行

schema.xml：数据库关系配置，分库分表配置

<?xml version="1.0"?>

<!DOCTYPE mycat:schema SYSTEM "schema.dtd">

<mycat:schema xmlns:mycat="http://io.mycat/">

<schema name="cuijiale" checkSQLschema="false" sqlMaxLimit="100">

<!-- auto sharding by id (long) -->

<table name="tb_user" dataNode="dn1,dn2" rule="sharding-by-murmur">

</table>

<!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate"

/> -->

</schema>

<!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"

/> -->

<dataNode name="dn1" dataHost="192.168.30.134" database="cuijiale" />

<dataNode name="dn2" dataHost="192.168.30.135" database="cuijiale" />

<!-- <dataNode name="dn3" dataHost="localhost1" database="db3" /> -->

<!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" />

<dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" />

<dataNode    name="jdbc_dn2" dataHost="jdbchost" database="db2" />

<dataNode name="jdbc_dn3" dataHost="jdbchost" database="db3" /> -->

<dataHost name="192.168.30.134" 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="192.168.30.134" url="192.168.30.134:3306" user="cuijiale" password="2153577"> 

        </writeHost>

<!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->

</dataHost>

<dataHost name="192.168.30.135" 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="192.168.30.135" url="192.168.30.135:3306" user="cuijiale" password="2153577"> 

        </writeHost>

<!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->

</dataHost>

</mycat:schema>

我这里准备了两台写库虚拟机，只为验证分库分表是否成功与否；

server.xml:配置用户信息

<?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:server xmlns:mycat="http://io.mycat/">

<system>

<property name="useSqlStat">0</property>  <!-- 1为开启实时统计、0为关闭 -->

<property name="useGlobleTableCheck">0</property>  <!-- 1为开启全加班一致性检测、0为关闭 -->

<property name="sequnceHandlerType">2</property>

      <!--  <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议-->

        <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--设置模拟的MySQL版本号-->

<!-- <property name="processorBufferChunk">40960</property> -->

<!--

<property name="processors">1</property>

<property name="processorExecutor">32</property>

-->

<!--默认为type 0: DirectByteBufferPool | type 1 ByteBufferArena-->

<property name="processorBufferPoolType">0</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="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> -->

<!--分布式事务开关，0为不过滤分布式事务，1为过滤分布式事务（如果分布式事务内只涉及全局表，则不过滤），2为不过滤分布式事务,但是记录分布式事务日志-->

<property name="handleDistributedTransactions">0</property>

<!--

off heap for merge/order/group/limit      1开启  0关闭

-->

<property name="useOffHeapForMerge">1</property>

<!--

单位为m

-->

<property name="memoryPageSize">1m</property>

<!--

单位为k

-->

<property name="spillsFileBufferSize">1k</property>

<property name="useStreamOutput">0</property>

<!--

单位为m

-->

<property name="systemReserveMemorySize">384m</property>

<!--是否采用zookeeper协调切换  -->

<property name="useZKSwitch">true</property>

</system>

<!-- 全局SQL防火墙设置 -->

<!--

<firewall>

  <whitehost>

      <host host="127.0.0.1" user="mycat"/>

      <host host="127.0.0.2" user="mycat"/>

  </whitehost>

      <blacklist check="false">

      </blacklist>

</firewall>

-->

<user name="cuijiale">

<property name="password">2153577</property>

<property name="schemas">cuijiale</property>

<!-- 表级 DML 权限设置 -->

<!--

<privileges check="false">

<schema name="TESTDB" dml="0110" >

<table name="tb01" dml="0000"></table>

<table name="tb02" dml="1111"></table>

</schema>

</privileges>

-->

</user>

<!-- <user name="user">

<property name="password">user</property>

<property name="schemas">TESTDB</property>

<property name="readOnly">true</property>

</user> -->

</mycat:server>

替换mycat服务配置文件后，启动服务：

在mycat安装目录bin文件夹下输入如下命令：

MyCat配置运行

有时linux虚拟机访问mysql会失败，一般情况会有防火墙，关掉防火墙在访问即可；

全部启动好后，两个库分别新建表tb_user:

CREATE TABLE `tb_user` ( `id` int(10) NOT NULL , `name` varchar(255) NULL , `sex` varchar(255) NULL , PRIMARY KEY (`id`) );

我是靠id分片的，这里要注意下：

全部搞定后，可以insert几条数据验证下：

MyCat配置运行

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