Hadoop is used to process massive volume of both structured and unstructured data that is so large that it's difficult to process using traditional software techniques, When dealing with larger datasets, organizations face difficulties in being able to create, manipulate, and manage big data.
Hadoop is an open source implementation of Google file system and map reduce which is a batch processing system .Hadoop comprises not one but multiple components that compliment a complete software development life cycle.
Hadoop is developed in java and has thrift API thus providing an ability to port with non-native languages like Python, Perl etc.
Pig and Hive are data access layers which provide defined ways to access and to perform data summarization using commands similar to SQL queries.
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