前言
實驗環境:
系統:centos7
Mysql版本: 5.7
Mycat版本: 1.6
Mycat主機ip位址: 10.8.161.75
主機1位址: 10.8.161.185
主機2位址: 10.8.161.186
實驗目标:
- 主1、主2實作分庫分表
- 主1建立database1、建立table1;主2建立database2 、建立table1、table2
- 通過mycat實作分庫分表
備注:本文略過主1和主2互為主從的搭建步驟,需要看請移步
<互為主從搭建步驟 />
一. 建立所需的庫和表
CREATE DATABASE databse1CHARACTER SET utf8 COLLATE utf8_general_ci; #建立database1庫
use database1; #進入 database1庫
CREATE TABLE table1 ( # 建立 table1表
id INT NOT NULL AUTO_INCREMENT,
city varchar(50) NOT NULL,
PRIMARY KEY (id)
)AUTO_INCREMENT= 1 ENGINE=InnoDB DEFAULT CHARSET=utf8;
insert into database1.table1 values(1,"beijing"); # 在table1插入資料
CREATE DATABASE databse2 CHARACTER SET utf8 COLLATE utf8_general_ci;
use databse2; # 建立 databse2 庫
use databse2 # 進入 databse2 庫
create table if not exists table2 (id int(10) PRIMARY KEY AUTO_INCREMENT,name varchar(50) NOT NULL); # 建立 table2 表
CREATE TABLE table1 ( # 同樣建立 table1表
id INT NOT NULL AUTO_INCREMENT,
city varchar(50) NOT NULL,
PRIMARY KEY (id)
)AUTO_INCREMENT= 1 ENGINE=InnoDB DEFAULT CHARSET=utf8;
insert into databse2.table1 values(1,"shanghai"); #插入 table1表資料
二. 設定Mycat配置檔案
這裡設定配置檔案之前記得先備份
1. 設定 server.xml
<user name="mycat">
<property name="password">aA12345678.</property>
<property name="schemas">mycat</property>
2. 設定 rule.xml
直接清空,導入
<?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="mycat-rule"> <!-- 表分片的規則名,這裡定義為mycat-rule,這個需要在schema.xml檔案中引用 -->
<rule>
<columns>id</columns> <!--biao1表的分片列 -->
<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> <!-- count值與分片個數相同,這裡table1表分片到庫database1和database2庫裡,共2份。 -->
</function>
</mycat:rule>
3. 設定 schema.xml
要将rule.xml裡定義的分片模型寫進去,由于這裡的table1表配置了主鍵,是以primaryKey="id"這個也寫進去,其他情況看表結構,也可以不寫):
<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
<schema name="mycat" checkSQLschema="false" sqlMaxLimit="100">
<table name="biao2" primaryKey="id" dataNode="dn1" />
<table name="table1" primaryKey="id" dataNode="dn1,dn2" rule="mycat-rule" />
</schema>
<dataNode name="dn1" dataHost="Mycat-node" database="databse2" />
<dataNode name="dn2" dataHost="Mycat-node" database="ku1" />
<dataHost name="Mycat-node" maxCon="1000" minCon="10" balance="1" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100">
<heartbeat>show slave status</heartbeat>
<writeHost host="Mysql-node1" url="10.8.161.185:3306" user="root" password="aA12345678.">
<readHost host="Mysql-node2" url="10.8.161.186:3306" user="root" password="aA12345678.">
</readHost>
</writeHost>
<writeHost host="Mysql-node1" url="10.8.161.185:3306" user="root" password="aA12345678.">
</writeHost>
</dataHost>
</mycat:schema>
4.啟動myact,登陸檢視
mysql> show databases;
+----------+
| DATABASE |
+----------+
| mycat |
+----------+
1 row in set (0.00 sec)
mysql> use mycat;
Database changed
mysql> show tables;
+-----------------+
| Tables in mycat |
+-----------------+
| table1 |
| table2 |
+-----------------+
2 rows in set (0.00 sec)
mysql> desc table1;
+-------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| city | varchar(50) | NO | | NULL | |
+-------+-------------+------+-----+---------+----------------+
2 rows in set (0.03 sec)
======================================================================================================================================================================================================================================================================================================
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