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

Another alternative way can be to use top and last on RDD of double. For example, val percentile_99th_value=scores.top((count/100).toInt).last

This method is more suited for individual percentiles.