This section refers to the installation settings of Hive on a standalone system as well as on a system existing as a node in a cluster.

INTRODUCTION

Apache Hive is a data warehouse infrastructure built on top of Hadoop for providing data summarization, query, and analysis. Apache Hive supports analysis of large datasets stored in Hadoop’s HDFS and compatible file systems such as Amazon S3 filesystem. It provides an SQL-like language called HiveQL(Hive Query Language) while maintaining full support for map/reduce.

Hive Installation

Installing HIVE:

  • Browse to the link: http://apache.claz.org/hive/stable/
  • Click the apache-hive-0.13.0-bin.tar.gz
  • Save and Extract it
    Commands
    user@ubuntu:~$  cd  /usr/lib/
user@ubuntu:~$  sudo mkdir hive
user@ubuntu:~$  cd Downloads
user@ubuntu:~$  sudo mv apache-hive-0.13.0-bin /usr/lib/hive

Setting Hive environment variable:

Commands
user@ubuntu:~$  cd
user@ubuntu:~$  sudo gedit  ~/.bashrc
 
Copy and paste the following lines at end of the file
 
# Set HIVE_HOME
export HIVE_HOME="/usr/lib/hive/apache-hive-0.13.0-bin"
PATH=$PATH:$HIVE_HOME/bin
export PATH

Setting HADOOP_PATH in HIVE config.sh

Commands
 
user@ubuntu:~$ cd  /usr/lib/hive/apache-hive-0.13.0-bin/bin
user@ubuntu:~$ sudo gedit hive-config.sh

Go to the line where the following statements are written
 
# Allow alternate conf dir location.
HIVE_CONF_DIR="${HIVE_CONF_DIR:-$HIVE_HOME/conf"
export HIVE_CONF_DIR=$HIVE_CONF_DIR
export HIVE_AUX_JARS_PATH=$HIVE_AUX_JARS_PATH
Below this write the following
export HADOOP_HOME=/usr/local/hadoop    (write the path where hadoop file is there)

Create Hive directories within HDFS

Command
user@ubuntu:~$   hadoop fs -mkdir /usr/hive/warehouse

Setting READ/WRITE permission for table

Command
user@ubuntu:~$  hadoop fs -chmod g+w /usr/hive/warehouse

HIVE launch

Command
user@ubuntu:~$  hive
Hive shell will prompt:

OUTPUT

Shell will look like
Logging initialized using configuration in jar:file:
/usr/lib/hive/apache-hive-0.13.0-bin/lib/hive- common-0.13.0.jar!
>/hive-log4j.properties
hive>

Creating a database

Command
hive> create database mydb;
OUTPUT
OK
Time taken: 0.369 seconds
hive>

Configuring hive-site.xml:

Open with text-editor and change the following property
<property>
    <name>hive.metastore.local</name>
    <value>TRUE</value>
    <description>controls whether to connect to remove metastore 
    server or open a new metastore server in Hive Client JVM</description>
</property>

<property>
    <name>javax.jdo.option.ConnectionURL</name>
    <value>jdbc:mysql://usr/lib/hive/apache-hive-0.13.0-bin/metastore_db? 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>hive.metastore.warehouse.dir</name>
    <value>/usr/hive/warehouse</value>
    <description>location of default database for the warehouse</description>
 </property>

Writing a Script

Open a new terminal (CTRL+ALT+T)
user@ubuntu:~$      sudo gedit sample.sql

create database sample;
use sample;
create table product(product int, productname string, price float)[row format delimited fields terminated by ',';]
describe product;
load data local inpath ‘/home/hduser/input_to_product.txt’ into table product
select * from product;
SAVE and CLOSE
user@ubuntu:~$ sudo gedit input_to_product.txt
user@ubuntu:~$ cd /usr/lib/hive/apache-hive-0.13.0-bin/ $ bin/hive -f /home/hduser/sample.sql