Hi All,
Recently I meet a problem in broadcast join: I want to left join table A
and B, A is the smaller one and the left table, so I wrote
A = A.join(B,A("key1") === B("key2"),"left")
but I found that A is not broadcast out, as the shuffle size is still very
large.
I guess this is a designed mechanism in spark, so could anyone please tell
me why it is designed like this? I am just very curious.Best, Paley
