Daily Archives: April 25, 2014


About Me

The main motto of this site is to provide tutorials on Hadoop technology and Big data tools so that any IT programmer can easily learn  the most emerging technology, Hadoop and use it for solving Big data processing problems. All the concepts covered in the site are presented with simple tested examples and provides more hands-on visibility of the technology on first read it self. All tutorials are free with […]


Creating Custom Hadoop Writable Data Type 10

If none of the built-in Hadoop Writable data types matches our requirements some times, then we can create custom Hadoop data type by implementing Writable interface or WritableComparable interface. Common Rules for creating custom Hadoop Writable Data Type A custom hadoop writable data type which needs to be used as value field in Mapreduce programs must implement Writable interface org.apache.hadoop.io.Writable. MapReduce key types should have the ability to compare against each […]


Review Comments
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I have attended Siva’s Spark and Scala training. He is good in presentation skills and explaining technical concepts easily to everyone in the group. He is having excellent real time experience and provided enough use cases to understand each concepts. Duration of the course and time management is awesome. Happy that I found a right person on time to learn Spark. Thanks Siva!!!

Dharmeswaran ETL / Hadoop Developer Spark Nov 2016 September 21, 2017

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