title: Can celery assign task to specify worker
body: <p>Celery will send task to idle workers.</p>
  
  <p>I have a task will run every 5 seconds, and I want this task to only be sent to one specify worker.</p>
  
  <p>Other tasks can share the left over workers    </p>
  
  <p>Can celery do this??   </p>
  
  <p>And I want to know what this parameter is: <code>CELERY_TASK_RESULT_EXPIRES</code><br>
  Does it means that the task will not be sent to a worker in the queue?<br>
  Or does it stop the task if it runs too long?    </p>