The documentation for the Django ORM transport for Celery says that using more than a few workers can cause some tasks to be executed more than once.
http://docs.celeryproject.org/en/latest/getting-started/brokers/django.html
Can anyone quantify what "more than a few" means? Concretely speaking, I have two servers and would like to run two celery workers. I am wondering if anyone can tell me if having two workers exposes me to the risk that some tasks will execute more than once.