title: Celery multiple instances and Redis
body: <p>I have two servers running Celery and one Redis database. They both listen to the same queue as they are meant to divide the "workload". Tasks are queued onto Redis, but it looks like both my Celery servers pick up the task at the same time, hence executing it twice (once on each server.) Is there a way to prevent this with the Redis/Celery setup?</p>
  
  <p>Thank you,</p>