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If DataNode increases, then do we need to upgrade NameNode?
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How to handle bad records during parsing?
Can you give some examples of Big Data?
If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
What is the NameNode port number?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
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Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?
What is the non dfs used?
Explain what is a task tracker in hadoop?
what if job tracker machine is down?
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