What happens to a namenode, when job tracker is down?
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How Mapper is instantiated in a running job?
Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?
Can you explain how do ‘map’ and ‘reduce’ work?
What are channel selectors?
Define a job tracker?
Does this lead to security issues?
What are the port numbers of namenode, job tracker and task tracker?
What does /var/hadoop/pids do?
What happens to a NameNode that has no data?
What is the meaning of the term "non-DFS used" in Hadoop web-console?
What does /etc /init.d do?
Why do we need a password-less ssh in fully distributed environment?