Hadoop
Hadoop is an open-source software framework for distributed storage and processing of large datasets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. The core components include the Hadoop Distributed File System (HDFS) for storage and MapReduce for processing.
Developers should learn Hadoop when working with big data applications that require handling petabytes of data across distributed systems, such as log processing, data mining, and machine learning tasks. It is particularly useful in scenarios where traditional databases are insufficient due to volume, velocity, or variety of data, enabling cost-effective scalability and fault tolerance.
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