Question
What is the difference between partitioning with key / hash and round robin?
Answers
Partitioning by Key / Hash Partition :

The partitioning technique that is used when the keys are diverse
Large data skew can exist when the key is present in large volume
It is apt for parallel data processing

Round Robin Partition : 

This partition technique uniformly distributed the data on every destination data partitions
When number of records is divisible by number of partitions, then the skew is zero.

For example: a pack of 52 cards is distributed among 4 players in a round-robin fashion.   Your Comment




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