Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?

741

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What is output format in hadoop?

734

---

How to enable/configure the compression of map output data in hadoop?

833

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What hadoop does in safe mode?

702

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What is inputformat in hadoop?

800

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Explain how input and output data format of the hadoop framework?

749

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when hadoop enter in safe mode?

796

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How to enable recycle bin or trash in hadoop?

737

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Whats is distributed cache in hadoop?

717

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what should be the ideal replication factor in hadoop?

697

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What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

765

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How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?

770

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How does an hadoop application look like or their basic components?

773

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What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

714

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What is partitioning?

515

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