We will see how to create a table in Hive using TEXTFILE format and how to import data into the table. TEXTFILE Textfile format stores data as plain text files. Textfile format enables rapid development due to its simplicity but other file formats like ORC are much better when it comes…
In this article we will see how to run Hive queries through JDBC. We are using apache-hive-1.0.1 and hiveserver2 is running on port 10000 on localhost. Jars Required To access Hive through JDBC we need to add the following jars in the classpath:- guava-18.0.jar hive-common-1.0.0.jar hive-exec-0.13.0.jar hive-jdbc-1.0.0.jar hive-metastore-1.0.0.jar hive-serde-1.0.0.jar hive-service-1.0.0.jar…
In this article we will see how to perform file operations on HDFS using Java APIs. Hadoop core jar is required to be added to the classpath. The class org.apache.hadoop.fs.FileSystem provide APIs for performing operations on HDFS. 1. Read a file from HDFS //Imports import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileSystem; //Code to…
We will see step by step process to install and configure a multi-node Hadoop 1.x setup. Cluster & User Suppose we want to setup a cluster of 5 machines. 192.168.0.1 192.168.0.2 192.168.0.3 192.168.0.4 192.168.0.5 We want to setup the cluster with the machine 192.168.0.1 as master node and all the…