title: Celery command line parameter for number of worker processes when using gevent
body: <p>For multiprocessing pool, I could using the paramter '-c' to specify the number of worker processes. As the folloing shows.</p>
  
  <pre><code>celery worker -A celerytasks.celery_worker_init -c 5 --loglevel=info
  </code></pre>
  
  <p>But for gevent pool, the paramter '-c' is used to specify greenlet number. How can start multiple worker processes? </p>
  
  <p>Or if I have to start mulitple wokers instead of one worker with multiple processes, could I do that with one command?</p>