[root@mycat1 ~]# vim /usr/local/mycat/conf/schema.xml
<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
?<schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100"> <!--對TESTDB庫下的表做分片存儲 --><!-- auto sharding by id (long) --><table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" /> <!-- 對travelrecord表做分片存儲 -->
?<!-- global table is auto cloned to all defined data nodes ,so can joinwith any table whose sharding node is in the same data node --><table name="company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /><table name="goods" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /><!-- random sharding using mod sharind rule --><table name="hotnews" primaryKey="ID" autoIncrement="true" dataNode="dn1,dn2,dn3"rule="mod-long" /><!-- <table name="dual" primaryKey="ID" dataNode="dnx,dnoracle2" type="global"needAddLimit="false"/> <table name="worker" primaryKey="ID" dataNode="jdbc_dn1,jdbc_dn2,jdbc_dn3"rule="mod-long" /> --><table name="employee" primaryKey="ID" dataNode="dn1,dn2,dn3"rule="sharding-by-intfile" /><table name="customer" primaryKey="ID" dataNode="dn1,dn2,dn3"rule="sharding-by-intfile"><childTable name="orders" primaryKey="ID" joinKey="customer_id"parentKey="id"><childTable name="order_items" joinKey="order_id"parentKey="id" /></childTable><childTable name="customer_addr" primaryKey="ID" joinKey="customer_id"parentKey="id" /></table><!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate"/> --></schema><!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"/> --><!-- 定義數(shù)據(jù)庫主機(jī)名及存儲數(shù)據(jù)的庫 --><dataNode name="dn1" dataHost="mysql1" database="db1" /><dataNode name="dn2" dataHost="mysql2" database="db2" /><dataNode name="dn3" dataHost="mysql3" database="db3" />
?<!-- 定義mysql1主機(jī)名對應(yīng)的數(shù)據(jù)庫服務(wù)器ip地址 --><dataHost name="mysql1" maxCon="1000" minCon="10" balance="0"writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"><heartbeat>select user()</heartbeat><writeHost host="hostM1" url="192.168.1.11:3306" user="mycatadmin"password="NSD2021@tedu.cn"></writeHost></dataHost>
?<dataHost name="mysql2" maxCon="1000" minCon="10" balance="0"writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"><heartbeat>select user()</heartbeat><writeHost host="hostM2" url="192.168.1.12:3306" user="mycatadmin"password="NSD2021@tedu.cn"></writeHost></dataHost>
?<dataHost name="mysql3" maxCon="1000" minCon="10" balance="0"writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"><heartbeat>select user()</heartbeat><writeHost host="hostM3" url="192.168.1.13:3306" user="mycatadmin"password="NSD2021@tedu.cn"></writeHost></dataHost>
</mycat:schema>
配置數(shù)據(jù)庫服務(wù)器
[root@mysql1 ~]# mysql -uroot -pNSD2021@tedu.cn
mysql> create database db1 default charset utf8mb4;
mysql> grant all on *.* to mycatadmin@'%' identified by 'NSD2021@tedu.cn';
?
[root@mysql2 ~]# mysql -uroot -pNSD2021@tedu.cn
mysql> create database db2 default charset utf8mb4;
mysql> grant all on *.* to mycatadmin@'%' identified by 'NSD2021@tedu.cn';
?
[root@mysql3 ~]# mysql -uroot -pNSD2021@tedu.cn
mysql> create database db3 default charset utf8mb4;
mysql> grant all on *.* to mycatadmin@'%' identified by 'NSD2021@tedu.cn';
啟動(dòng)MyCat
在MyCat服務(wù)器上測試到3臺數(shù)據(jù)庫服務(wù)器的連接賬戶
# 安裝mysql客戶端軟件
[root@mycat1 ~]# yum install -y mysql-community-client
?
[root@mycat1 ~]# mysql -h192.168.1.11 -umycatadmin -pNSD2021@tedu.cn
[root@mycat1 ~]# mysql -h192.168.1.12 -umycatadmin -pNSD2021@tedu.cn
[root@mycat1 ~]# mysql -h192.168.1.13 -umycatadmin -pNSD2021@tedu.cn
