Introduction to Queues

Azure Queue storage is a service for storing large numbers of messages that can be accessed from anywhere in the world via authenticated calls using HTTP or HTTPS. A single queue message can be up to 64 KB in size, and a queue can contain millions of messages, up to the total capacity limit of a storage account.

Common uses

Common uses of Queue storage include:

  • Creating a backlog of work to process asynchronously
  • Passing messages from an Azure web role to an Azure worker role

Queue service concepts

The Queue service contains the following components:

Queue Concepts

  • URL format: Queues are addressable using the following URL format:
    http://<storage account><queue>

    The following URL addresses a queue in the diagram:

  • Storage account: All access to Azure Storage is done through a storage account. See Azure Storage Scalability and Performance Targets for details about storage account capacity.

  • Queue: A queue contains a set of messages. All messages must be in a queue. Note that the queue name must be all lowercase. For information on naming queues, see Naming Queues and Metadata.

  • Message: A message, in any format, of up to 64 KB. The maximum time that a message can remain in the queue is seven days.

Next steps