What are active and passive "NameNodes"?
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what is meaning Replication factor?
Does Hadoop requires RAID?
How indexing is done in HDFS?
How many instances of tasktracker run on a hadoop cluster?
What is MapFile?
What is DistributedCache and its purpose?
what is SPF?
How to enable/configure the compression of map output data in hadoop?
Define fault tolerance?
Rack awareness of Namenode?
How to resolve IOException: Cannot create directory
What is Row Key?
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