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What are the differences between NAS and HDFS?

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The are some key differences between NAS and HDFS:

  • HDFS has replication due to it being a culmination of the memory space of various nodes and contributes towards data redundancy. NAS runs on a single machine which means that there is no possibility of data redundancy with NAS. 
  • While NAS uses dedicated hardware components for its implementation, HDFS used commodity hardware or hardware being used for normal purposes (local systems) for storage.
  • Data is stored without regard for computational analysis in NAS therefore Hadoop MapReduce cannot be used on it. Whereas if data is stored in HDFS, we can use MapReduce. 

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