What is difference between regular file system and HDFS?
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How many maximum jvm can run on a slave node?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
How is HDFS fault tolerant?
Is hadoop required for data science?
What is a checkpoint?
What is HDFS Federation?
What is the purpose of DataNode block scanner?
How does NameNode tackle DataNode failures?
Did you ever ran into a lop sided job that resulted in out of memory error
Is map like a pointer?
On what basis data will be stored on a rack?
How to resolve small file problem in hdfs?
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