mycat 垂直切分和水平切分配置示例

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" />

                <!-- 全局表的配置以下(好比配置文件的數據，數據不大不多變更的，可是常常用到查詢的) -->
                <!-- <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)

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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)