使用MySQL作为Hive的Metastore
使用MySQL作为Hive的Metastore前提是成功安装了HIVE和MYSQL
在hive-site.xml中添加如下内容，指定METASTORE的地址以及连接方式
<property> <name>javax.jdo.option.ConnectionURL</name> <value>jdbc:mysql://10.20.151.10:3306/hive?characterEncoding=UTF-8</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>hive_user</value> <description>username to use against metastore database</description></property><property> <name>javax.jdo.option.ConnectionPassword</name> <value>123</value> <description>password to use against metastore database</description></property>
然后登陆到HIVE客户端，创建一个表试试
$ bin/hiveHive history file=/tmp/gpadmin1/hive_job_log_gpadmin1_201106081130_1156785421.txthive> show tables;FAILED: Error in metadata: javax.jdo.JDOFatalDataStoreException: Unknown database 'hive'NestedThrowables:com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'hive'FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask
报错了，提示很明显，识别不到名称为hive的database，难道要自己创建？试试
#mysql -u root -pEnter password: Welcome to the MySQL monitor.Commands end with ; or \g.Your MySQL connection id is 41Server version: 5.5.12 MySQL Community Server (GPL)Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || mysql || performance_schema || test |+--------------------+4 rows in set (0.00 sec)mysql> create database hive;Query OK, 1 row affected (0.00 sec)mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || hive || mysql || performance_schema || test |+--------------------+5 rows in set (0.00 sec)
再登陆到HIVE里看看
$ bin/hiveHive history file=/tmp/gpadmin1/hive_job_log_gpadmin1_201106081130_544334815.txthive> show table; FAILED: Parse Error: line 0:-1 mismatched input '<EOF>' expecting EXTENDED in show statementhive> show tables;OKTime taken: 5.173 secondshive> CREATE TABLE u_tmp1 (id1 INT, > id2 int > ) > ROW FORMAT DELIMITED > FIELDS TERMINATED BY ',';OKTime taken: 0.266 secondshive> show tables; OKu_tmp1Time taken: 0.197 secondshive>
注：
修改数据库的binlog
Java代码
set global binlog_format='MIXED';
READ-COMMITTED需要把bin-log以mixed方式来记录
否则进入hive，会如下错误
FAILED: Error in metadata: javax.jdo.JDOException: Couldnt obtain a new sequence (unique id) : Binary logging not possible. Message: Transaction level 'READ-COMMITTED' in InnoDB is not safe for binlog mode 'STATEMENT'
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