Switches the execution platform between the local host and the Hadoop cluster. No changes in the R code are required for a dry run.
TRUE to run a MapReduce program locally, or
FALSE to run the program on the Hadoop cluster.
orch.dryrun function enables you to run a MapReduce program locally on a laptop using a small data set before running it on a Hadoop cluster using a very large data set. The mappers and reducers are run sequentially on row streams from HDFS. The Hadoop cluster is not required for a dry run.