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What are the configuration files in Hadoop?
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Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?
What is the role of the namenode?
What are the features of Fully-Distributed mode?
What kind of hardware is best for hadoop?
Explain what is hadoop?
What are the modes in which Hadoop run?
What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?
what if job tracker machine is down?
What does the high availability of a name-node means?
What is Identity reducer?
Are job tracker and task trackers present in separate machines?
Define “speculative execution” in hadoop?
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