How to compute percentiles in Apache Spark

Question

I have an rdd of integers (i.e. RDD[Int]) and what I would like to do is to compute the following ten percentiles: [0th, 10th, 20th, ..., 90th, 100th]

Answer 1

Convert you RDD into a RDD of Double, and then use the .histogram(10) action. See DoubleRDD ScalaDoc