What is rack-aware replica placement policy?
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What happens to job tracker when namenode is down?
What hadoop does in safe mode?
What are combiners and its purpose?
Should we use RAID in Hadoop or not?
Is secondary namenode a substitute to the namenode?
Is hadoop open source?
What do you know about sequencefileinputformat?
What are the two main parts of the hadoop framework?
What is the jobtracker?
How many instances of a jobtracker run on hadoop cluster?
What should be the ideal replication factor in Hadoop Cluster?
Define a task tracker?
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