MYCAT分库分表
一、整体架构
1、192.168.189.130:mysql master服务,两个数据库db_store、db_user,db_store做了主从复制
db_user:
用户表users为分片表
数据字典表data_dictionary为全局表
用户地址表user_address为ER表和用户表有关联
db_store(做了主从复制):
门店表store、店员表employee为非分片表,就是mysql中普通的表
2、192.168.189.131:mysql slave服务,两个数据库db_store、db_user,db_store做了主从复制
同192.168.189.130
3、192.168.189.132:mycat服务
db_user:逻辑库
users、data_dictionary、user_address逻辑表
db_store:逻辑库
store、employee逻辑表
二、mycat配置 /root/data/program/mycat/conf
1、schema.xml
<?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="db_store" checkSQLschema="false" sqlMaxLimit="100"> <table name="store" dataNode="db_store_dataNode" primaryKey="storeID"/> <table name="employee" dataNode="db_store_dataNode" primaryKey="employeeID"/> </schema> <schema name="db_user" checkSQLschema="false" sqlMaxLimit="100"> <table name="data_dictionary" type="global" dataNode="db_user_dataNode1,db_user_dataNode2" primaryKey="dataDictionaryID"/> <table name="users" dataNode="db_user_dataNode$1-2" rule="mod-userID-long" primaryKey="userID"> <childTable name="user_address" joinKey="userID" parentKey="userID" primaryKey="addressID"/> </table> </schema> <!-- 节点配置 --> <!-- db_store --> <dataNode name="db_store_dataNode" dataHost="db_storeHOST" database="db_store" /> <!-- db_user --> <dataNode name="db_user_dataNode1" dataHost="db_userHOST1" database="db_user" /> <dataNode name="db_user_dataNode2" dataHost="db_userHOST2" database="db_user" /> <!-- 节点主机配置 --> <!-- 配置db_store的节点主机 --> <dataHost name="db_storeHOST" maxCon="1000" minCon="10" balance="1" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"> <heartbeat>select user()</heartbeat> <!-- can have multi write hosts --> <writeHost host="hostM1" url="192.168.189.130:3306" user="root" password="123456"> <!-- can have multi read hosts --> <readHost host="hostS1" url="192.168.189.131:3306" user="root" password="123456" /> </writeHost> </dataHost> <!-- 配置db_user的节点主机 --> <dataHost name="db_userHOST1" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"> <heartbeat>select user()</heartbeat> <writeHost host="userHost1" url="192.168.189.130:3306" user="root" password="123456"> </writeHost> </dataHost> <dataHost name="db_userHOST2" 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="userHost2" url="192.168.189.131:3306" user="root" password="123456"> </writeHost> </dataHost> </mycat:schema>
2、server.xml配置
<?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="root"> <property name="password">123456</property> <property name="schemas">db_store,db_user</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> </mycat:server>
3、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="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="mod-userID-long"> <rule> <columns>userID</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="mod-long" class="io.mycat.route.function.PartitionByMod"> <!-- how many data nodes --> <property name="count">2</property> </function> <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="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>
三、效果
1、db_user库users表
往mycat逻辑库db_user的逻辑表users插入数据,根据分片规则,userID取模,最后数据分别存在master db_user users和slave db_user users中
分片规则:
schema.xml: <schema name="db_user" checkSQLschema="false" sqlMaxLimit="100"> <table name="data_dictionary" type="global" dataNode="db_user_dataNode1,db_user_dataNode2" primaryKey="dataDictionaryID"/> <table name="users" dataNode="db_user_dataNode$1-2" rule="mod-userID-long" primaryKey="userID"> <childTable name="user_address" joinKey="userID" parentKey="userID" primaryKey="addressID"/> </table> </schema> rule.xml <tableRule name="mod-userID-long"> <rule> <columns>userID</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>
1、mycat逻辑库db_user中逻辑表users
2、master服务db_user库中users表
3、slave服务db_user库中users表
2、db_user库data_dictionary表
数据字典表(data_dictionary)是全局表因此master、slave都会保存完整数据
1、mycat
2、master
3、slave
3、db_user库user_address表
用户地址表(user_address)是ER表,master、slave分别保存各自users对应的地址
1、mycat
2、master
3、slave