How many instances of a jobtracker run on hadoop cluster?
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Explain Erasure Coding in Apache Hadoop?
On what basis name node distribute blocks across the data nodes?
What is cloudera and why it is used?
What is the difference between SQL and NoSQL?
How do you define "block" in HDFS?
What do you know by storage and compute node?
What is Schema on Read and Schema on Write?
How does NameNode tackle DataNode failures?
what are the nodes in the Hadoop cluster?
Why do we need a password-less ssh in fully distributed environment?
Explain what if rack 2 and datanode fails?
What is IdentityMapper?
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