In a MapR environment, consider the following performance guideline for MapR volumes:

MapR Volume is a logical unit that allows you to apply policies to a set of files, directories, and sub-volumes. When the Hive warehouse or the Hive scratch directory is configured on a different volume than the HDFS source or targets, there is a significant delay between subsequent Hive queries.

For more information, refer to the following link:

http://answers.mapr.com/questions/3560/failed-with-exception-cannot-rename-across-volumes