What are some of the characteristics of Hadoop framework?

438

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Where are Hadoop’s configuration files located?

507

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Can you give a detailed overview about the Big Data being generated by Facebook?

430

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How to remove safemode of namenode forcefully in HDFS?

36

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Who divides the file into Block while storing inside hdfs in hadoop?

49

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What are file permissions in HDFS? how does HDFS check permissions for files/directory?

53

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How one can change Replication factor when Data is already stored in HDFS

44

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Explain HDFS “Write once Read many” pattern?

34

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Why is block size set to 128 MB in HDFS?

41

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What should be the HDFS Block size to get maximum performance from Hadoop cluster?

37

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What is the importance of dfs.namenode.name.dir in HDFS?

58

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How one can format Hadoop HDFS?

47

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Explain what happens if, during the PUT operation, HDFS block is assigned a replication factor 1 instead of the default value 3?

42

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How to format the HDFS? How frequently it will be done?

36

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Which one is the master node in HDFS? Can it be commodity hardware?

47

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