#3185

Debarati chatterjee

How to implement MapSide Join or Reduce SideJoin in PIG?
Ans
Map-side join: n a map-side (fragment-replicate) join, you hold one dataset in memory (and join on the other dataset, record-by-record. In this type of join the large relation is followed by one or more small relations. The small relations must be small enough to fit into main memory; if they don’t, the process fails and an error is generated.

Prwatech