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HomeDatabaseMysql TutorialHive两种模式安装

Hive两种模式安装 数据仓库工具,可以把Hadoop下的原始结构化数据变成Hive中的表。 支持一种与SQL几乎完全相同的语言HiveQL,除了不支持更新、索引和事务。 可以看成是从SQL到Map-Reduce的映射器。 提供shell、JDBC/ODBC、thrift、Web等接口。 一、内嵌模式

Hive两种模式安装

 

数据仓库工具,可以把Hadoop下的原始结构化数据变成Hive中的表。

 

  支持一种与SQL几乎完全相同的语言HiveQL,除了不支持更新、索引和事务。

 

  可以看成是从SQL到Map-Reduce的映射器。

 

  提供shell、JDBC/ODBC、thrift、Web等接口。

 

一、内嵌模式安装

 

  这样安装的元数据保持在内嵌的Derby数据库中,只能允许一个会话连接,只适用于简单的测试。

 

  1、解压Hive

 

[coder@h1 ~]$ tar -zxvf hive-0.10.0.tar.gz

  2、配置环境变量/etc/profile

 

    加入Hive的安装目录,并把Hive的bin目录配置到PATH

 

HIVE_HOME=/home/coder/hive-0.10.0

PATH=$HADOOP_INSTALL/bin:$PIG_INSTALL/bin:$JAVA_HOME/bin:$HIVE_HOME/bin:$PATH

    执行 source /etc/profile命令,使得配置生效

 

  3、新建Hive所需目录

 

    在HDFS上建立/tmp和/user/hive/warehouse目录,并赋予组用户写权限。这是Hive默认的数据文件存放目录,可以在hive-site.xml文件中配置。

 

[coder@h1 hadoop-0.20.2]$ bin/hadoop fs -mkdir /tmp

[coder@h1 hadoop-0.20.2]$ bin/hadoop fs -mkdir /user/hive/warehouse

[coder@h1 hadoop-0.20.2]$ bin/hadoop fs -chmod g+w /tmp

[coder@h1 hadoop-0.20.2]$ bin/hadoop fs -chmod g+w /user/hive/warehouse

  4、输入hive命令,出现类似下面的内容,说明安装成功。

 

[coder@h1 hadoop-0.20.2]$ hive

Logging initialized using configuration in jar:file:/home/coder/hive-0.10.0/lib/hive-common-0.10.0.jar!/hive-log4j.properties

Hive history file=/tmp/coder/hive_job_log_coder_201305072118_1272944282.txt

hive> 

hive> show tables;

OK

Time taken: 24.479 seconds

hive> exit;

 

二、独立模式安装

 

  支持多用户会话,需要一个独立的元数据库,常用的是使用MySQL作为元数据库。

  1、启动MySQL

 

[root@h1 ~]# service mysqld start

Starting mysqld:  [  OK  ]

[root@h1 ~]# 

  2、为Hive建立相应的MySQL账号

 

[root@h1 ~]# mysql

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.1.66 Source distribution

 

Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

 

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

 

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

 

mysql> create user 'hive' identified by '123456';

Query OK, 0 rows affected (0.00 sec)

 

mysql> GRANT ALL PRIVILEGES ON *.* TO 'hive'@'localhost' IDENTIFIED BY '123456' WITH GRANT OPTION; 

Query OK, 0 rows affected (0.00 sec)

 

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

 

mysql> exit

Bye

[root@h1 ~]# 

 

    然后从客户端用hive账号登陆MySQL

 

Hive两种模式安装

 

  3、建立Hive专用元数据库

 

mysql>create database hive;

  4、配置Hive

 

    在Hive安装目录的conf目录下,将hive-default.xml.template复制一份命名为:hive-site.xml

 

  修改以下内容,配置上mysql数据连接、驱动、用户名和密码

 

   javax.jdo.option.ConnectionURL

   jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true

   javax.jdo.option.ConnectionDriverName

   com.mysql.jdbc.Driver

   javax.jdo.option.ConnectionUserName

   hive

   javax.jdo.option.ConnectionPassword

   123456

 

  5、把mysql的驱动包拷贝到Hive安装路径下的lib目录

 

  6、进入Hive,没报错说明独立模式安装成功

 

[coder@h1 ~]$ hive

Logging initialized using configuration in jar:file:/home/coder/hive-0.10.0/lib/hive-common-0.10.0.jar!/hive-log4j.properties

Hive history file=/tmp/coder/hive_job_log_coder_201305072212_717503278.txt

hive> show tables;

OK

Time taken: 24.783 seconds

hive> exit;

 

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