The ScaleR package provides functions for performing scalable and extremely high performance data management, analysis, and visualization in R. It was only available to those who had a Microsoft R Server license—until now.
Of course, there’s a catch—there are constraints. Specifically
[…] the data to be processed must fit in local memory, and processing is limited up to two threads for ScaleR functions.
However, this allows you to prototype your analyses using the free client and push them to SQL Server or Hadoop using Microsoft R Server when you need to scale.