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Hadoop is an open-source framework designed to handle vast amounts of structured and unstructured data by distributing storage and computation across a cluster of commodity hardware. At the core of Hadoop is its master/slave architecture, which enables efficient management of large-scale datasets. The Hadoop Distributed File System (HDFS) is the storage layer of Hadoop, optimized for high-throughput access to large files, fault tolerance, and scalability. HDFS follows a master/slave design, where the master node, known as the NameNode, coordinates the system, and the slave nodes, called DataNodes, handle the actual storage of data blocks. The NameNode maintains the metadata of the file system, which includes information such as the file hierarchy, file-to-block mappings, block locations on ____ __________ _______ ______ ________ ___ _________ _________ ________ _____ ______ _________.
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