Introduction to Hadoop: "Hadoop is sub-project of Lucene (a collection of industrial-strength search tools), under the umbrella of the Apache Software Foundation. Hadoop parallelizes data processing across many nodes (computers) in a compute cluster, speeding up large computations and hiding I/O latency through increased concurrency. Hadoop is especially well-suited to large data processing tasks (like searching and indexing) because it can leverage its distributed file system to cheaply and reliably replicate chunks of data to nodes in the cluster, making data available locally on the machine that is processing it."
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