Saving data frames on Spark Master/Driver

[vr.n. nachiappan]

Hello,
I am using data frames to join two cassandra tables.
Currently when i invoke save on data frames as shown below it is saving the 
join results on executor nodes. 
joineddataframe.select(<col1>, <col2> 
...).format("com.databricks.spark.csv").option("header", "true").save(<path>)
I would like to persist the results of the join on Spark Master/Driver node. Is 
it possible to save the results on Spark Master/Driver and how to do it.
I appreciate your help.
Nachi