title: using Grok to skip parts of message or logs
body: <p>I have just started using grok for logstash and I am trying to parse my log file using grok filter. 
  My logline is something like below</p>
  
  <blockquote>
    <p>03-30-2017 13:26:13 [00089] TIMER XXX.TimerLog: entType [organization], queueType [output], memRecno = 446323718, audRecno = 2595542711, elapsed time = 998ms</p>
  </blockquote>
  
  <p>I want to capture only the initial date/time stamp, <code>entType [organization]</code>,  and <code>elapsed time = 998ms</code>. </p>
  
  <p>However, it looks like I have to match pattern for every word and number in the line. Is there a way I can skip it ? I tried to look everywhere but couldn't find anything. Kindly help. </p>