Avro Data Files are portable across platforms. You can read the Data Files written by java program from a python program. Data Files carry the schema with them.In
Avro DataFiles are binary files that carry the schema with them. They are splittable and allows seeking to a random position. You can sync with record boundary . You need
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.
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
In this blog we will see how to create the wordcount example project in eclipse , we will be using maven as build tool. File->New->Project -> Maven Project
With the VMs available from different vendors(Cloudera, Horton Networks, MapR, etc..) it is easy to get started with the Hadoop and its related technologies. System Requirements : To