title: How to prevent Cassandra commit logs filling up disk space
body: <p>I'm running a two node Datastax AMI cluster on AWS. Yesterday, Cassandra started refusing connections from everything. The system logs showed nothing. After a <em>lot</em> of tinkering, I discovered that the commit logs had filled up all the disk space on the allotted mount and this seemed to be causing the connection refusal (deleted some of the commit logs, restarted and was able to connect).</p>
  
  <p>I'm on DataStax AMI 2.5.1 and Cassandra 2.1.7</p>
  
  <p>If I decide to wipe and restart everything from scratch, how do I ensure that this does not happen again?</p>