Service-Oriented Architecture and Cloud Computing

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03 Introduction to Computing Models and YARN

This chapter explores various Distributed Computing Models and introduces Apache Hadoop’s resource management layer, YARN.

Learning Objectives

  • Distinguish between different computing models: Client-Server, P2P, Event-Driven
  • Understand the core components of the Hadoop Ecosystem
  • Explain the role of HDFS (Storage) and YARN (Resource Management)
  • Describe how YARN decouples resource scheduling from data processing applications

Why YARN?

In the early days of Hadoop (v1), MapReduce was the only processing engine. YARN (Yet Another Resource Negotiator) was introduced in Hadoop v2 to create a general-purpose cluster operating system, allowing multiple applications (MapReduce, Spark, Flink) to run on the same shared cluster resources.

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