Category: Java

We have already seen how to use Junit to write unit tests for your java classes. There is specialized test suite for testing mapreduce jobs, known as MRUnit.

In the previous we have seen how to read a file from HDFS. In this blog we will see how to write a file from local file system

Hadoop does not use the default java serialization framework for performance reasons. It has it’s own serialization format writables , which is fast and compact but not interoperable. For that hadoop

Hadoop Supports many input/output file formats. In this blog we will see how to read a text file and we will save the results in Sequence file format.

In this blog we will see how to setup unit testing for a java project. Fist create a java project and a simple class. I created a simple