Explain InputFormat?
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Why are the number of splits equal to the number of maps?
How to enable/configure the compression of map output data in hadoop?
Why the name ‘hadoop’?
What is HDFS Block size? How is it different from traditional file system block size?
What are the problems with Hadoop 1.0?
What are the different types of Znodes?
What is partioner in hadoop? Where does it run,mapper or reducer?
How can one increase replication factor to a desired value in Hadoop?
What is difference between split and block in hadoop?
What is the use of combiners in the hadoop framework?
What is the problem with HDFS and streaming data like logs
What is the main purpose of HDFS fsck command?