所以我們先進入一下Hadoop官網，首先輸入網址:見原文鏈接，點擊進入Hadoop官網，我們就會看到一段英文:The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines， each offering local computation and storage. Rather than rely on hardware to deliver high-availability， the library itself is designed to detect and handle failures at the application layer， so delivering a highly-available service on top of a cluster of computers， each of which may be prone to failures.
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