what is meaning Replication factor?
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On what basis data will be stored on a rack?
what is meaning Replication factor?
Does Hadoop requires RAID?
Explain the difference between NameNode
What is Safemode in Apache Hadoop?
What is a heartbeat in HDFS?
Do we need to give a password, even if the key is added in ssh?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
Name the various types of lists supported by bootstrap.
Which are the two types of 'writes' in HDFS?
What is the heartbeat used for?
Explain a simple Map/Reduce problem.