medium10 pts · first answer countssparkjoins

Joining with a small lookup table

You join a 2 TB events DataFrame with a 20 MB country lookup table in Spark. What is the best join strategy?

A.Sort-merge join, shuffling both tablesB.Broadcast the small table to every executor and do a broadcast hash joinC.Cross join and then filterD.Collect the 2 TB table to the driver

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Joining with a small lookup table

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