The Queue service stores messages that may be read by any client who has access to the storage account.
A queue can contain an unlimited number of messages, each of which can be up to 8 KB in size. Messages are generally added to the end of the queue and retrieved from the front of the queue, although first in/first out (FIFO) behavior is not guaranteed. If you need to store messages larger than 8 KB, you can store message data as a queue or in a table and then store a reference to the data as a message in a queue.
Queue Storage is offered by Windows Azure as a REST
API which is wrapped by the
Zend_Service_WindowsAzure_Storage_Queue class in order to
provide a native PHP interface to the storage account.