Dataframe sample in Apache spark | Scala

Question

I\'m trying to take out samples from two dataframes wherein I need the ratio of count maintained. eg

df1.count() = 10
df2.count() = 1000

noOfSamples = 10
         


        

Answer 1

To answer if the fraction can be greater than 1. Yes, it can be if we have replace as yes. If a value greater than 1 is provided with replace false, then following exception will occur:

java.lang.IllegalArgumentException: requirement failed: Upper bound (2.0) must be <= 1.0.