Why is Data Block size set to 128 MB in Hadoop?

474

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What is a Heartbeat in Hadoop?

615

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Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

556

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What is a Backup node in Hadoop?

611

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What do you mean by the NameNode High Availability in hadoop?

536

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What is the default replication factor in Hadoop and how will you change it?

652

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Why Hadoop performs replication, although it results in data redundancy?

1323

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What is Balancer in Hadoop?

530

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What is active and passive NameNode in Hadoop?

506

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How can one check whether NameNode is working or not?

586

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How would you restart NameNode?

458

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How NameNode tackle Datanode failures in Hadoop?

515

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Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?

484

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If DataNode increases, then do we need to upgrade NameNode in Hadoop?

502

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What is meant by streaming access?

595

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