Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

41

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If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

40

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What is the difference between an hdfs block and input split?

74

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Explain hdfs?

58

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Explain the key features of hdfs?

30

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How does hdfs get a good throughput?

61

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Explain how indexing is done in hdfs?

43

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Explain the difference between mapreduce engine and hdfs cluster?

130

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Explain the difference between an hdfs block and input split?

61

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What do you know about sequencefileinputformat?

630

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Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

638

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Why the name ‘hadoop’?

609

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What do you know about nlineoutputformat?

682

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How can we change the split size if our commodity hardware has less storage space?

656

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How is hadoop different from other data processing tools?

671

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