数据库本地127.0.0.1 需要把数据库中的一个两个表进行分库分表 贴出schema.xml配置 <?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat=" <schema name="nykmark" checkSQLschema="true" > <!-- auto sharding by id (long) --> <table name="article_view_log" primaryKey="id" autoIncrement="true" dataNode="dn1,dn2,dn3" rule="mod-long" /> </schema> <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743" /> --> <dataNode name="dn1" dataHost="localhost1" database="nykmark" /> <dataNode name="dn2" dataHost="localhost1" database="nykmark-1" /> <dataNode name="dn3" dataHost="localhost1" database="nykmark-2" /> <!--<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="localhost1" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" switchType="3" slaveThreshold="100"> <heartbeat>select user()</heartbeat> <!-- can have multi write hosts --> <writeHost host="hostM1" url="127.0.0.1:3306" user="root" password="root"> <readHost host="hostS2" url="127.0.0.1:3306" user="root" password="root" /> </writeHost> <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> --> </dataHost> </mycat:schema>
server.xml如下
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mycat:server SYSTEM "server.dtd"> <mycat:server xmlns:mycat="http://io.mycat/"> <system> <property name="nonePasswordLogin">0</property> <!-- 0为需要密码登陆、1为不需要密码登陆 ,默认为0,设置为1则需要指定默认账户--> <property name="useHandshakeV10">1</property> <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="sqlExecuteTimeout">300</property> <!-- SQL 执行超时 单位:秒--> <property name="sequnceHandlerType">1</property> <!--<property name="sequnceHandlerPattern"> (?:(\s*next\s+value\s+for\s*MYCATSEQ_(\w+))(,|\)|\s)*)+</property>--> <!--必须带有MYCATSEQ_或者 mycatseq_进入序列匹配流程 注意MYCATSEQ_有空格的情况--> <property name="sequnceHandlerPattern"> (?:(\s*next\s+value\s+for\s*MYCATSEQ_(\w+))(,|\)|\s)*)+</property> <property name="subqueryRelationshipCheck">false</property> <!-- 子查询中存在关联查询的情况下,检查关联字段中是否有分片字段 .默认 false --> <!-- <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 | type 2 NettyBufferPool --> <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="dataNodeIdleCheckPeriod">300000</property> 5 * 60 * 1000L; //连接空闲检查 <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">64k</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">false</property> <!-- XA Recovery Log日志路径 --> <!--<property name="XARecoveryLogBaseDir">./</property>--> <!-- XA Recovery Log日志名称 --> <!--<property name="XARecoveryLogBaseName">tmlog</property>--> <!--如果为 true的话 严格遵守隔离级别,不会在仅仅只有select 语句的时候在事务中切换连接--> <property name="strictTxIsolation">false</property> <property name="useZKSwitch">true</property> </system> <!-- 全局SQL防火墙设置 --> <!--白名单可以使用通配符%或着*--> <!--例如<host host="127.0.0.*" user="root"/>--> <!--例如<host host="127.0.*" user="root"/>--> <!--例如<host host="127.*" user="root"/>--> <!--例如<host host="1*7.*" user="root"/>--> <!--这些配置情况下对于127.0.0.1都能以root账户登录--> <!-- <firewall> <whitehost> <host host="1*7.0.0.*" user="root"/> </whitehost> <blacklist check="false"> </blacklist> </firewall> --> <user name="root" defaultAccount="true"> <property name="password">123456</property> <property name="schemas">nykmark</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">123456</property> <property name="schemas">nykmark</property> <property name="readOnly">true</property> </user> </mycat:server>
配置数据库的全局唯一ID
DROP TABLE IF EXISTS MYCAT_SEQUENCE; CREATE TABLE MYCAT_SEQUENCE ( NAME VARCHAR (50) NOT NULL, current_value INT NOT NULL, increment INT NOT NULL DEFAULT 100, PRIMARY KEY (NAME) ) ENGINE = INNODB ; INSERT INTO MYCAT_SEQUENCE(name,current_value,increment) VALUES ('GLOBAL', 100000, 100); DROP FUNCTION IF EXISTS `mycat_seq_currval`; DELIMITER ;; CREATE FUNCTION `mycat_seq_currval`(seq_name VARCHAR(50)) RETURNS varchar(64) CHARSET utf8 DETERMINISTIC BEGIN DECLARE retval VARCHAR(64); SET retval="-999999999,null"; SELECT concat(CAST(current_value AS CHAR),",",CAST(increment AS CHAR) ) INTO retval FROM MYCAT_SEQUENCE WHERE name = seq_name; RETURN retval ; END ;; DELIMITER ; DROP FUNCTION IF EXISTS `mycat_seq_nextval`; DELIMITER ;; CREATE FUNCTION `mycat_seq_nextval`(seq_name VARCHAR(50)) RETURNS varchar(64) CHARSET utf8 DETERMINISTIC BEGIN UPDATE MYCAT_SEQUENCE SET current_value = current_value + increment WHERE name = seq_name; RETURN mycat_seq_currval(seq_name); END ;; DELIMITER ; DROP FUNCTION IF EXISTS `mycat_seq_setval`; DELIMITER ;; CREATE FUNCTION `mycat_seq_setval`(seq_name VARCHAR(50), value INTEGER) RETURNS varchar(64) CHARSET utf8 DETERMINISTIC BEGIN UPDATE MYCAT_SEQUENCE SET current_value = value WHERE name = seq_name; RETURN mycat_seq_currval(seq_name); END ;; DELIMITER ;
把数据表的名字写入MYCAT_SEQUENCE
如果关联表比较多的话定义全局表
<table name="users" primaryKey="user_id" type="global" dataNode="dn1,dn2,dn3" />