4-安装mariadb

①yum install mariadb-server mariadb

　　　　systemctl start mariadb　　 #启动MariaDB

　　　　systemctl stop mariadb 　　#停止MariaDB

　　　　systemctl restart mariadb　　 #重启MariaDB

　　　　systemctl enable mariadb　　 #设置开机启动

②进入：mysql -u root -p

　　1、use mysql -uroot; //不输入密码
　　2、use mysql
　　3、update user set password=PASSWORD('root') where user='root'; //设置root的密码
　　4、update user set host='%' where host='127.0.0.1'; //允许其他人用root登录
　　5、flush privileges;

③更改配置文件hive-site.xml

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
     <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
     <configuration>   

         <property>
             <name>hive.metastore.warehouse.dir</name>
             <value>/user/hive/warehouse</value>
             <description>location of default database for the warehouse</description>
         </property>  

         <property>
             <name>hive.cli.print.current.db</name>
             <value>true</value>
             <description>Whether to include the current database in the Hive prompt.</description>
         </property>  

         <property>
             <name>hive.cli.print.header</name>
             <value>true</value>
             <description>Whether to print the names of the columns in query output.</description>
         </property>
         <property>
             <name>javax.jdo.option.ConnectionURL</name>
             <value>jdbc:mysql://192.168.40.10:3306/metastore?createDatabaseIfNotExist=true</value>
         </property>    

         <property>
             <name>javax.jdo.option.ConnectionDriverName</name>
             <value>com.mysql.jdbc.Driver</value>
         </property>
         <property>
                <name>javax.jdo.option.ConnectionUserName</name>
                <value>root</value>
          </property>

          <property>
                <name>javax.jdo.option.ConnectionPassword</name>
                <value>root</value>
          </property>

      </configuration>        

④启动hive之后，再进入mysql -uroot -proot ，如能出现metastore数据库，则表示成功