I found the following description in a Redbook.
Apache Spark Implementation on IBM z/OS
2.7 Spark R
Spark R is an R package that provides a light-weight front-end to use Apache Spark from R.
Spark R exposes the Spark API through the RDD class, and enables users to interactively run jobs from the R shell on a cluster. Rocket Software is in progress with a port of R to z/OS, and interested clients should contact either Rocket directly or IBM.
I’d like to use R with Apache Spark on z/OS.
Can we get Spark R library for z/OS?
Do you have any documentation about how to use SparkR on z/OS?