R is well-suited to handle data that can fit in memory but additional tools are needed when the amount of data you want to analyze in R grows beyond the limits of your machine’s RAM. There have been a variety of solutions to this problem over the years that aim to solve this problem in R; one of the latest options is Apache Spark™. Spark is a cluster computing tool that enables analysis of massive, distributed data across dozens or hundreds of servers. Spark now includes an integration with R via the SparkR package. Due to Spark’s ability to interact with distributed data little latency, it is becoming an attractive tool for interfacing with large datasets in an interactive environment. In addition to handling the storage of data, Spark also incorporates a variety of other tools including stream processing, computing on graphs, and a distributed machine learning framework. Some of these tools are available to R programmers via the SparkR package. In this talk, we’ll discuss how to leverage Spark’s capabilities in a modern R environment. In particular, we’ll discuss how to use Spark within an R Markdown document or even in an interactive Shiny application. We’ll also briefly discuss alternative approaches to working with large data in R and the pros and cons of using Spark.