DataYatriSpark, seen under the hood
Simulate

Simulation/Spark

Educational simulation
Spark

Broadcast join

Copy the small side. The fact table does not shuffle.

Watch the canvas:small table (broadcast)fact (stays)driver collectLive simulation
Drivercollects build sideregions 20 MBbroadcastorders 2 TBnever shuffledcopySmall table is the build side.
Broadcast = copy the small side. The 2 TB side does not move.