What is the difference between partitioning with key and
round robin?
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Answer Posted / shashank
Partitioning by key distributes the data into various
multifile partitions depending upon of the fields present in
the input(key), while Partitioning by round robin distribues
data equally among the partitions irrespective of the key
field. Round robin ensures equitable distribution of data
among the partitions, while By key may lead to inequitable
distribution.
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