What is difference between a MapReduce InputSplit and HDFS block
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Answer Posted / Vinita Chaudhary
An HDFS block is a physical segment of data stored in Hadoop Distributed File System. An InputSplit, on the other hand, is a logical partition of the data that MapReduce uses to divide the work among multiple mappers. One or more HDFS blocks can contribute to an InputSplit, and the size of an InputSplit doesn't necessarily match the size of an HDFS block.
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