Hive1.2安装

1. 安装mysql数据库（这个能够用其余DB代替），安装方法参照之前写的Mysql安装教程。

2. 登陆mysql，建立hive用户。

```

create user 'hive' identified by 'hive';

grant all privileges on *.* to 'hive'@'%' with grant option;

flush privileges;    

```

3. 建立hive数据库

```

create database hive;

show databases;

```

4. 安装Hadoop集群环境，按照hadoop伪分布式安装教程安装

5. 下载Hive安装包，并解压至相关目录

6. 设置环境变量

```

#hive pro

export HIVE_HOME=/home/dzy/runsofts/apache-hive-1.2.1

export PATH=$PATH:$HIVE_HOME/bin

export CLASSPATH=$CLASSPATH:$HIVE_HOME/bin

```

使其生效
```source /etc/profile```

7. 建立一个IO的tmp文件，笔者在用户根目录下建立的 hive/iotmp 用来修改配置

8. 修改Hive配置，将其conf文件中的hive-default.xml.templete配置文件复制更名hive-site.xml，主要修改如下参数

```

  <property>

    <name>javax.jdo.option.ConnectionURL</name>

    <value>jdbc:mysql://localhost:3306/hive</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</value>

    <description>Username to use against metastore database</description>

  </property>

  <property>

    <name>javax.jdo.option.ConnectionPassword</name>

    <value>hive</value>

    <description>password to use against metastore database</description>

  </property>

  <property>

    <name>hive.querylog.location</name>

    <value>/home/dzy/logs/hive_logs</value>

    <description>Location of Hive run time structured log file</description>

  </property>

  <property>

    <name>hive.exec.local.scratchdir</name>

    <value>/home/dzy/hive/iotmp/hive-${user.name}</value>

    <description>Local scratch space for Hive jobs</description>

  </property>

  <property>

    <name>hive.downloaded.resources.dir</name>

    <value>/home/dzy/hive/iotmp</value>

    <description>Temporary local directory for added resources in the remote file system.</description>

  </property>

```

8. 启动hive，若是出现如下提示，须要将conf中的复制修改 cp hive-env.sh.template hive-env.sh

```
dzy@dzy-pc ~/runsofts/apache-hive-1.2.1/conf $ hive

Cannot find hadoop installation: $HADOOP_HOME or $HADOOP_PREFIX must be set or hadoop must be in the         path

```

将其中的修改

```

# Set HADOOP_HOME to point to a specific hadoop install directory

HADOOP_HOME=/home/dzy/runsofts/hadoop

```

9. 启动hive，此时正常启动。此时mysql的hive库中多了不少表。

10. 在启动的hive中直接建立表

```

hive> create table test1(name string,age int);

OK

Time taken: 0.793 seconds

hive> show tables;

OK

test1

Time taken: 0.046 seconds, Fetched: 1 row(s)

hive> desc te

temporary    terminated   textfile     

hive> desc test1;

OK

name                	string              	                    

age                 	int                 	                    

Time taken: 0.185 seconds, Fetched: 2 row(s)

```

11. 在mysql查看建立的表，这个表不是物理表哦～

```

select * from hive.TBLS

```

12. 删除该表drop table test1