mycat 垂直切分和水平切分配置示例
首先是數據庫表的分佈：
192.168.0.83：db1數據庫 test1表；db3數據庫 user表 user_detail表
192.168.0.165：db1數據庫 test2表；db3數據庫 user表 user_detail表
sql：
/*
Navicat MySQL Data Transfer
Source Server : localhost
Source Server Version : 50713
Source Host : localhost:3306
Source Database : db1
Target Server Type : MYSQL
Target Server Version : 50713
File Encoding : 65001
Date: 2016-08-26 17:23:56
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `test1`
-- ----------------------------
DROP TABLE IF EXISTS `test1`;
CREATE TABLE `test1` (
`id` int(11) NOT NULL,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of test1
-- ----------------------------
/*
Navicat MySQL Data Transfer
Source Server : localhost
Source Server Version : 50713
Source Host : localhost:3306
Source Database : db3
Target Server Type : MYSQL
Target Server Version : 50713
File Encoding : 65001
Date: 2016-08-26 17:24:04
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `user`
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL,
`user_id` varchar(255) DEFAULT NULL,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user
-- ----------------------------
/*
Navicat MySQL Data Transfer
Source Server : localhost
Source Server Version : 50713
Source Host : localhost:3306
Source Database : db3
Target Server Type : MYSQL
Target Server Version : 50713
File Encoding : 65001
Date: 2016-08-26 17:24:18
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `user_detail`
-- ----------------------------
DROP TABLE IF EXISTS `user_detail`;
CREATE TABLE `user_detail` (
`id` int(11) NOT NULL,
`user_id` varchar(255) DEFAULT NULL,
`detail` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user_detail
-- ----------------------------
/*
Navicat MySQL Data Transfer
Source Server : song
Source Server Version : 50713
Source Host : 192.168.0.165:3306
Source Database : db1
Target Server Type : MYSQL
Target Server Version : 50713
File Encoding : 65001
Date: 2016-08-26 17:24:27
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `test2`
-- ----------------------------
DROP TABLE IF EXISTS `test2`;
CREATE TABLE `test2` (
`id` int(11) NOT NULL,
`name` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of test2
-- ----------------------------schema.xml文件：
<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://org.opencloudb/">
<schema name="qs" checkSQLschema="false" sqlMaxLimit="100">
<!-- 垂直切分 -->
<table name="test1" primaryKey="id" type="global" dataNode="nodeTest1" />
<table name="test2" primaryKey="id" type="global" dataNode="nodeTest2" />
<!-- 全局表的配置如下(比如配置文件的數據，數據不大很少變動的，但是經常用到查詢的) -->
<!-- <table name="t_area" primaryKey="id" type="global" dataNode="dn1,dn2" /> -->
<!-- 水平切分 -->
<!-- ER分片表:如user表和user_detail表的關聯字段user_id；保證相同user_id的數據在同一塊片區上 -->
<table name="user" primaryKey="user_id" dataNode="nodeUser01,nodeUser02" rule="mod-long">
<childTable name="user_detail" primaryKey="id" joinKey="user_id" parentKey="user_id" />
</table>
</schema>
<dataNode name="nodeUser01" dataHost="dataHost01" database="db3" />
<dataNode name="nodeUser02" dataHost="dataHost02" database="db3" />
<dataNode name="nodeTest1" dataHost="dataHost01" database="db1" />
<dataNode name="nodeTest2" dataHost="dataHost02" database="db1" />
<dataHost name="dataHost01" maxCon="1000" minCon="10" balance="0"
writeType="0" dbType="mysql" dbDriver="native">
<heartbeat>select user()</heartbeat>
<writeHost host="hostM1" url="192.168.0.83:3306" user="root" password="root"/>
</dataHost>
<dataHost name="dataHost02" maxCon="1000" minCon="10" balance="0"
writeType="0" dbType="mysql" dbDriver="native">
<heartbeat>select user()</heartbeat>
<writeHost host="hostM1" url="192.168.0.165:3306" user="root" password="root"/>
</dataHost>
</mycat:schema>注： rule=”mod-long” 分片規則是根據分片字段求模運算；
分片規則有：固定分片hash，範圍約定，一致性hash，按日期範圍等。
詳見官網文檔 http://www.mycat.org.cn/document/Mycat_V1.6.0.pdf
測試：
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysql -uroot -proot -hlocalhost -P8066 -Dqs
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.5.8-mycat-1.4-release-20151019230038 MyCat Server (OpenCloundDB)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.
mysql> show databases;
+———-+
| DATABASE |
+———-+
| qs |
+———-+
1 row in set (0.00 sec)
mysql> show tables;
+————–+
| Tables in qs |
+————–+
| test1 |
| test2 |
| user |
| user_detail |
+————–+
4 rows in set (0.00 sec)