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What is the purpose of DataNode block scanner?
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How will you make changes to the default configuration files?
Can we have multiple entries in the master files?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
In which location Name Node stores its Metadata and why?
Is it necessary to write jobs for hadoop in the java language?
How to change Replication Factor For below cases ?
How to restart Namenode?
what are the steps involved in commissioning adding
Does Hadoop requires RAID?
Explain the use of tasktracker in the hadoop cluster?
Can the balancer be run while Hadoop is in use?
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