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What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
679What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
626What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
722Post New Apache Hadoop Questions
what is the default replication factor in HDFS?
What is the jobtracker and what it performs in a hadoop cluster?
What is formatting of the dfs?
Explain why do we need hadoop?
What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?
Is it necessary to know java to learn hadoop?
What is inputsplit in hadoop? Explain.
What are the modes in which Apache Hadoop run?
What are combiners and its purpose?
How would you tackle counting words in several text documents?
Explain the features of stand alone (local) mode?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is Rack awareness?
Which command is used for the retrieval of the status of daemons running the hadoop cluster?
