title: Unique job data in beanstalkd
body: <p>I've been testing beanstalkd today and I am wondering is there anyway possible to make job data unique on beanstald tube? In other words, is it possible to make the tube have only unique values? If no, maybe someone could suggest me similar MQ system which have this feature.</p>
  
  <p>Thank you in advance for your answers!</p>