title: Logstash indexer is scalable?
body: <p>I am using logstash shipper -> redis -> logstash indexer -> elastricsearch -> kibana</p>
  
  <p>I understand that redis and elastricsearch are designed to be scalable.
  How about logstash indexer, I only see on logstash main site show an example of using only single logstash indexer.</p>
  
  <p>Would that be enough to handle all logs? and what is your suggestion on having many instances of logstash indexer?</p>