title: Celery in Amazon Server
body: <p>I have two nodes (two computers are already connected) in the server and every node has 4 cores, how can I cluster these two computers using celery + RabbitMQ, when I start celeryd, it shows that:</p>
  
  <pre><code> -------------- celery@ip-10-77-137-41 v3.0.19 (Chiastic Slide)
   ---- **** ----- 
   --- * ***  * -- Linux-3.2.0-36-virtual-x86_64-with-Ubuntu-12.04-precise
   -- * - **** --- 
   - ** ---------- [config]
   - ** ---------- .&gt; broker:      amqp://celeryuser@localhost:5672/celeryvhost
   - ** ---------- .&gt; app:         default:0x29ecf90 (.default.Loader)
   - ** ---------- .&gt; concurrency: 2 (processes)
   - *** --- * --- .&gt; events:      OFF (enable -E to monitor this worker)
   -- ******* ---- 
   --- ***** ----- [queues]
   -------------- .&gt; celery:      exchange:celery(direct) binding:celery
  </code></pre>
  
  <p>Can I just set concurrency as 8 to using these two nodes?</p>