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Hadoop MapReduce is a programming model that facilitates distributed processing of large datasets using a master/slave architecture, where the JobTracker manages TaskTrackers for job execution. The framework operates through a series of phases including mapping, shuffling, and reducing, allowing for parallel execution of tasks and efficient resource management. YARN, introduced in Hadoop 2.0, enhances resource allocation and supports various processing engines, improving scalability and performance while in

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ddharshini984

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