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What is Hadoop?

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Hadoop is an open-source framework that supports big data technology.

It helps to store, process and handle large datasets. The important components of Hadoop are:

  • Hadoop Distributed File System (HDFS)
  • Yet Another Resource Negotiator (YARN)
  • Common

HDFS

  • It is a virtual File system.
  • It is primary storage in Hadoop.
  • Infinitely scalable.

Yarn

  • Responsible for providing computational resources.
  • Comprises Resource Manager, Node Manager, Application Manager.

Hadoop Common

  • It is a collection of libraries that implement underlying capabilities lacked by Hadoop.

Note: When Hive wants to access HDFS, it needs to make java jar files that are stored in COMMON.

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