Hive元数据配置到MySql

1 驱动拷贝
1）在/opt/software/mysql-libs目录下解压mysql-connector-java-5.1.27.tar.gz驱动包

[root@hadoop102 mysql-libs]# tar -zxvf mysql-connector-java-5.1.27.tar.gz

2）拷贝/opt/software/mysql-libs/mysql-connector-java-5.1.27目录下的mysql-connector-java-5.1.27-bin.jar到/opt/module/hive/lib/

[root@hadoop102 mysql-connector-java-5.1.27]# cp mysql-connector-java-5.1.27-bin.jar /opt/module/hive/lib/

2 配置Metastore到MySql
1）在/opt/module/hive/conf目录下创建一个hive-site.xml

[root@hadoop102 conf]# touch hive-site.xml
[root@hadoop102 conf]# vi hive-site.xml

2）根据官方文档配置参数，拷贝数据到hive-site.xml文件中。
​​​ https://cwiki.apache.org/confluence/display/Hive/AdminManual+MetastoreAdmin​​ 具体参数配置

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
    <property>
      <name>javax.jdo.option.ConnectionURL</name>
      <value>jdbc:mysql://hadoop102:3306/metastore?createDatabaseIfNotExist=true</value>
      <description>JDBC connect string for a JDBC metastore</description>
    </property>

    <property>
      <name>javax.jdo.option.ConnectionDriverName</name>
      <value>com.mysql.jdbc.Driver</value>
      <description>Driver class name for a JDBC metastore</description>
    </property>

    <property>
      <name>javax.jdo.option.ConnectionUserName</name>
      <value>root</value>
      <description>username to use against metastore database</description>
    </property>

    <property>
      <name>javax.jdo.option.ConnectionPassword</name>
      <value>000000</value>
      <description>password to use against metastore database</description>
    </property>
</configuration>

3）配置完毕后，如果启动hive异常，可以重新启动虚拟机。（重启后，别忘了启动hadoop集群）
3 多窗口启动Hive测试
1）先启动MySQL

[dev1@hadoop102 mysql-libs]$ mysql -uroot -p000000

查看有几个数据库

mysql> show databases;

2）再次打开多个窗口，分别启动hive

[dev1@hadoop102 hive]$ bin/hive

3）启动hive后，回到MySQL窗口查看数据库，显示增加了metastore数据库

mysql> show databases;

±-------------------+
| Database |
±-------------------+
| metastore |
±-------------------+