MyCat分库分表中怎么实现ER分片

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项目环境： 

192.168.8.30  mycat

192.168.8.31  node1

192.168.8.32  node2

192.168.8.33  node3

三个节点MySQL均为单实例

一、配置schema.xml

<?xml version="1.0"?><!DOCTYPE mycat:schema SYSTEM "schema.dtd"><mycat:schema xmlns:mycat="Http://io.mycat/">        <schema name="mycatdb" checksqlschema="false" sqlMaxLimit="100">            <table name="order01" dataNode="dn$1-3,dn$13-15,dn$25-27" rule="mod-long">           <childTable name="orderdetail01" primaryKey="orderdetail_id" joinKey="order_id" parenTKEy="order_id" /></table>        </schema><!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"/> -->        <dataNode name="dn1" dataHost="node1" database="testdb01" />        <dataNode name="dn2" dataHost="node1" database="testdb02" />        <dataNode name="dn3" dataHost="node1" database="testdb03" />        <dataNode name="dn4" dataHost="node1" database="testdb04" />        <dataNode name="dn5" dataHost="node1" database="testdb05" />        <dataNode name="dn6" dataHost="node1" database="testdb06" />        <dataNode name="dn7" dataHost="node1" database="testdb07" />        <dataNode name="dn8" dataHost="node1" database="testdb08" />        <dataNode name="dn9" dataHost="node1" database="testdb09" />        <dataNode name="dn10" dataHost="node1" database="testdb10" />        <dataNode name="dn11" dataHost="node1" database="testdb11" />        <dataNode name="dn12" dataHost="node1" database="testdb12" />        <dataNode name="dn13" dataHost="node2" database="testdb13" />        <dataNode name="dn14" dataHost="node2" database="testdb14" />        <dataNode name="dn15" dataHost="node2" database="testdb15" />        <dataNode name="dn16" dataHost="node2" database="testdb16" />        <dataNode name="dn17" dataHost="node2" database="testdb17" />        <dataNode name="dn18" dataHost="node2" database="testdb18" />        <dataNode name="dn19" dataHost="node2" database="testdb19" />        <dataNode name="dn20" dataHost="node2" database="testdb20" />        <dataNode name="dn21" dataHost="node2" database="testdb21" />        <dataNode name="dn22" dataHost="node2" database="testdb22" />        <dataNode name="dn23" dataHost="node2" database="testdb23" />        <dataNode name="dn24" dataHost="node2" database="testdb24" />        <dataNode name="dn25" dataHost="node3" database="testdb25" />        <dataNode name="dn26" dataHost="node3" database="testdb26" />        <dataNode name="dn27" dataHost="node3" database="testdb27" />        <dataNode name="dn28" dataHost="node3" database="testdb28" />        <dataNode name="dn29" dataHost="node3" database="testdb29" />        <dataNode name="dn30" dataHost="node3" database="testdb30" />        <dataNode name="dn31" dataHost="node3" database="testdb31" />        <dataNode name="dn32" dataHost="node3" database="testdb32" />        <dataNode name="dn33" dataHost="node3" database="testdb33" />        <dataNode name="dn34" dataHost="node3" database="testdb34" />        <dataNode name="dn35" dataHost="node3" database="testdb35" />        <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" /> <dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" /><dataNodename="jdbc_dn2" dataHost="jdbchost" database="db2" /><dataNode name="jdbc_dn3" dataHost="jdbchost" database="db3" /> --><dataHost name="node1" 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="192.168.8.31" url="192.168.8.31:3306" user="root"  passWord="mysql"></writeHost>        </dataHost>        <dataHost name="node2" 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="192.168.8.32" url="192.168.8.32:3306" user="root"  password="mysql"></writeHost>        </dataHost>        <dataHost name="node3" 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="192.168.8.33" url="192.168.8.33:3306" user="root"  password="mysql"></writeHost>        </dataHost></mycat:schema>

二、配置rule.xml

<mycat:rule xmlns:mycat="http://io.mycat/">             <tableRule name="mod-long">                <rule>                        <columns>order_id</columns>                        <alGorithm>mod-long</algorithm>                </rule>        </tableRule>               <function name="mod-long" class="io.mycat.route.function.PartitionByMod">                <property name="count">9</property>        </function> </mycat:rule>

三、配置server.xml

<user name="root" defaultAccount="true"><property name="password">mysql</property><property name="schemas">mycatdb</property></user>

四、创建测试库

node1

create database testdb01;create database testdb02;create database testdb03;

node2

create database testdb13;create database testdb14;create database testdb15;

node3 

create database testdb25;create database testdb26;create database testdb27;

五、启动mycat

/usr/local/mycat/bin/mycat start

查看mycat日志

STATUS | wrapper  | 2018/11/22 14:12:55 | --> Wrapper Started as DaemonSTATUS | wrapper  | 2018/11/22 14:12:55 | Launching a JVM...INFO   | jvm 1    | 2018/11/22 14:12:55 | Openjdk 64-Bit Server VM warning: ignoring option MaxPermSize=64M; support was removed in 8.0INFO   | jvm 1    | 2018/11/22 14:12:58 | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.orgINFO   | jvm 1    | 2018/11/22 14:12:58 |   Copyright 1999-2006 Tanuki Software, Inc.  All Rights Reserved.INFO   | jvm 1    | 2018/11/22 14:12:58 | INFO   | jvm 1    | 2018/11/22 14:13:04 | MyCAT Server startup successfully. see logs in logs/mycat.log

六、登录MySQL，查看逻辑表

mysql -uroot -pmysql -P8066 -h292.168.8.30

mysql> show databases;+----------+| DATABASE |+----------+| mycatdb  |+----------+1 row in set (0.02 sec)mysql> use mycatdbReading table infORMation for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> show tables;+-------------------+| Tables in mycatdb |+-------------------+| order01           || orderdetail01     || user01            || user02            |+-------------------+4 rows in set (0.00 sec)mysql> select * from order01;ERROR 1105 (HY000): Table 'testdb03.order01' doesn't existmysql> mysql> drop table if exists order01;Query OK, 0 rows affected, 1 warning (0.46 sec)mysql> drop table if exists orderdetail01;Query OK, 0 rows affected, 1 warning (0.16 sec)mysql> CREATE TABLE order01(    -> order_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> number VARCHAR(64),    -> createtime DATETIME);Query OK, 0 rows affected (0.58 sec)mysql> CREATE TABLE orderdetail01(    -> orderdetail_id INT AUTO_INCREMENT PRIMARY KEY,    -> order_id INT,    -> order_status CHAR(1),    -> addresss VARCHAR(128),    -> createtime DATETIME,    -> CONSTRAINT fk_iorder01 FOREIGN KEY (order_id) REFERENCES order01    -> (order_id));Query OK, 0 rows affected (0.63 sec)

七、插入测试数据

父表和子表各插入9条记录

INSERT INTO order01(order_id,number,createtime) VALUES(1,'steven101',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (1,1,'1','steven101(ID=1,steven101)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(2,'steven201',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (2,2,'1','steven201(ID=2,steven201)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(3,'steven301',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (3,3,'1','steven301(ID=3,steven301)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(4,'steven401',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (4,4,'1','steven401(ID=4,steven401)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(5,'steven501',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (5,5,'1','steven501(ID=5,steven501)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(6,'steven601',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (6,6,'1','steven601(ID=6,steven601)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(7,'steven701',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (7,7,'1','steven701(ID=7,steven701)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(8,'steven801',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (8,8,'1','steven801(ID=8,steven801)',NOW());INSERT INTO order01(order_id,number,createtime) VALUES(9,'steven901',NOW());INSERT INTO orderdetail01(orderdetail_id,order_id,order_status,addresss,createtime) VALUES (9,9,'1','steven901(ID=9,steven901)',NOW());

八、验证数据

schema.xml中，order01和orderdetail01分片只配置了testdb01-03，testdb13-15，testdb25-27，所以除了这9个物理库之外，其他库查不到分片。

下面在三个node分别验证出分片信息：

node1

mysql> select * from testdb01.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        9 | steven901 | 2018-11-22 14:21:20 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb01.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              9 |        9 | 1            | steven901(ID=9,steven901) | 2018-11-22 14:21:23 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.01 sec)mysql> select * from testdb02.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        1 | steven101 | 2018-11-22 14:21:18 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb02.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              1 |        1 | 1            | steven101(ID=1,steven101) | 2018-11-22 14:21:18 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.01 sec)mysql> select * from testdb03.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        2 | steven201 | 2018-11-22 14:21:18 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb03.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              2 |        2 | 1            | steven201(ID=2,steven201) | 2018-11-22 14:21:18 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.00 sec)

node2

mysql> select * from testdb13.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        3 | steven301 | 2018-11-22 14:21:17 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb13.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              3 |        3 | 1            | steven301(ID=3,steven301) | 2018-11-22 14:21:17 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.01 sec)mysql> select * from testdb14.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        4 | steven401 | 2018-11-22 14:21:17 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb14.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              4 |        4 | 1            | steven401(ID=4,steven401) | 2018-11-22 14:21:17 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb15.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        5 | steven501 | 2018-11-22 14:21:18 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb15.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              5 |        5 | 1            | steven501(ID=5,steven501) | 2018-11-22 14:21:18 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.00 sec)

node3

mysql> select * from testdb25.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        6 | steven601 | 2018-11-22 14:21:20 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb25.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              6 |        6 | 1            | steven601(ID=6,steven601) | 2018-11-22 14:21:20 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb26.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        7 | steven701 | 2018-11-22 14:21:20 |+----------+-----------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb26.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              7 |        7 | 1            | steven701(ID=7,steven701) | 2018-11-22 14:21:20 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.00 sec)mysql> select * from testdb27.order01;+----------+-----------+---------------------+| order_id | number    | createtime          |+----------+-----------+---------------------+|        8 | steven801 | 2018-11-22 14:21:20 |+----------+-----------+---------------------+1 row in set (0.01 sec)mysql> select * from testdb27.orderdetail01;+----------------+----------+--------------+---------------------------+---------------------+| orderdetail_id | order_id | order_status | addresss                  | createtime          |+----------------+----------+--------------+---------------------------+---------------------+|              8 |        8 | 1            | steven801(ID=8,steven801) | 2018-11-22 14:21:20 |+----------------+----------+--------------+---------------------------+---------------------+1 row in set (0.00 sec)

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