juniorHadoop

What is Hadoop?

Updated May 16, 2026

Short answer

Hadoop is an open-source framework for distributed storage and processing of large datasets using HDFS and MapReduce.

Deep explanation

Hadoop enables scalable, fault-tolerant processing across clusters of commodity hardware. It consists of HDFS (storage), YARN (resource management), and MapReduce (processing). It distributes data and computation to achieve high throughput.

Real-world example

Used by companies like Yahoo and Facebook to process petabytes of logs and user data.

Common mistakes

  • Assuming Hadoop is only MapReduce or only a database.

Follow-up questions

  • What are Hadoop core components?
  • Is Hadoop still relevant?

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