To communicate with the worker role, a web role instance places messages on to a queue. A workerrole instance polls the queue for new messages, retrieves them, and processes them. There are acouple of important things to know about the way the queue service works in Azure. First, youreference a queue by name, and multiple role instances can share a single queue. Second, there is noconcept of a typed message; you construct a message from either a string or a byte array. Anindividual message can be no more than 64 kilobytes (KB) in size.