What is commodity hardware?
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What is Disk Balancer in Apache Hadoop?
What problems can be addressed by using Zookeeper?
What is HDFS Federation?
What is small file problem in hadoop?
How the HDFS Blocks are replicated?
Does Hadoop requires RAID?
What exactly is hadoop?
What is a namenode? How many instances of namenode run on a hadoop cluster?
What is a checkpoint?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
Should we use RAID in Hadoop or not?
What is crontab? Explain with suitable example?
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