What Is Apache Hadoop?
The Apache Hadoop applications library is a framework that allows for the distributed processing of large data sets across clusters of computers using programming models that are straightforward. It's made to scale up from single servers to thousands of machines, each offering local computation and storage. Rather than rely on hardware to provide high-availability, the library itself is built to find and manage failures in the application layer delivering a highly-accessible service along with a bunch of computers, every one of which could be prone to failures.
The project includes these modules:
•Hadoop Common: The common utilities that support the other Hadoop modules.
•Hadoop Distributed File System: A distributed file system that provides high-throughput access to application data.
•Hadoop YARN: A framework for job scheduling and cluster resource management.
•Hadoop Map Reduce: A YARN-based system for parallel processing of large data sets.