The example on slide 23 would not have "Narrow Dependencies" is that correct?
@IntergalacticPeanutMaker, I think the example on slide 23 still has "Narrow Dependencies".
timestamps is created after count() is executed. So we can know that there is no partitions for timestamps when count() is executed. (mobileViews RDD is only referenced by numViews) And after count() is executed, RDD for numViews has already been materialized, so there is no partitions for numViews any more. (mobileViews RDD is only referenced by timestamps)