What is Balancer in Hadoop?
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what is next step after mapper or maptask?
Tell me some major benefits of Hadoop?
What is streaming access?
Ideally what should be the replication factor in hadoop?
What is throughput in Hadoop?
Why would nosql be better than using a sql database? And how much better is it?
Define a udf?
What do you know about yarn?
After increasing the replication level, I still see that data is under replicated. What could be wrong?
How would you restart NameNode?
Can hadoop replace relational database?
What kind of hardware is best for hadoop?
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