Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/21589#discussion_r198722972
--- Diff: R/pkg/R/context.R ---
@@ -451,3 +435,31 @@ setCheckpointDir <- function(directory) {
sc <- getSparkContext()
invisible(callJMethod(sc, "setCheckpointDir",
suppressWarnings(normalizePath(directory))))
}
+
+#' Total number of CPU cores of all executors registered in the cluster at
the moment.
+#'
+#' @rdname spark.numCores
+#' @return current number of cores in the cluster.
+#' @examples
+#'\dontrun{
+#' spark.numCores()
+#'}
+#' @note numCores since 2.4.0
--- End diff --
this needs to match the function name
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