sthibault on "DSE 3.1 number of hadoop tasks"

I've setup a fresh DSE 3.1 install on two nodes. Per recommendations the Cassandra node has num_tokens=256 and the Analytics node has num_tokens=1.

When I run a hadoop job or a hive query, there are 258 map tasks started which overwhelms the system and takes a very long time to finish. Why are so many map tasks created? How can I control it?

Thanks,
--Scott