What is a block and block scanner in HDFS?
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Why do we need a password-less ssh in fully distributed environment?
how can we change Replication Factor?
Mention what is the number of default partitioner in Hadoop?
What is small file problem in hadoop?
How do you categorize a big data?
What is the problem with small files in Apache Hadoop?
What is the full form of fsck?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
Explain the difference between NameNode
Explain Erasure Coding in Apache Hadoop?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
Command to format the NameNode?