title: How to reduce the amount of logging for `zookeeper`?
body: <p>I set up a three-node <code>kafka</code> and <code>zookeeper</code> cluster more than half a year ago and I am using the <code>zookeeper</code> server that came with <a href="http://apache.communilink.net/kafka/0.8.2.1/kafka_2.10-0.8.2.1.tgz" rel="nofollow">the <code>kafka</code> package</a>. As it turns out, the default configuration results in too much log information being gathered from <code>zookeeper</code> (2GB from each node so far).</p>
  
  <p>How can I turn the log level down, and is it OK for me to delete old logs from <code>zookeeper</code> abruptly?</p>