The conf/ directory of cassandra contains log4j-server.properties.  I would assume cassandra just rides on top of whatever log4j does.

-- 
Akshay

On Wednesday, February 27, 2013 at 12:44 PM, Andy Stec wrote:

Cassandra rotates system.log when it reaches 20MB.  We see that old logs
are kept for over a month. Is Cassandra going to delete or compress these
logs when a certain threshold is reached or are we supposed to do it
ourselves?