Azure Queue 和 Service Bus Queue的比较

 

编码

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Message Class Name	CloudQueueMessage	BrokeredMessage
Send Method Name	CloudQueue.AddMessage()	QueueClient.Send()
Queue Size	ApproximateMessageCount
How to Create Queue	// Retrieve storage account from connection string. CloudStorageAccount storageAccount = CloudStorageAccount.Parse(     CloudConfigurationManager.GetSetting("StorageConnectionString")); // Create the queue client. CloudQueueClient queueClient = storageAccount.CreateCloudQueueClient(); // Retrieve a reference to a queue. CloudQueue queue = queueClient.GetQueueReference("myqueue"); // Create the queue if it doesn't already exist. queue.CreateIfNotExists();	QueueDescription qd = new QueueDescription("TestQueue"); qd.MaxSizeInMegabytes = 5120; qd.DefaultMessageTimeToLive = new TimeSpan(0, 1, 0); // Create a new Queue with custom settings string connectionString =    CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ConnectionString"); var namespaceManager =     NamespaceManager.CreateFromConnectionString(connectionString); if (!namespaceManager.QueueExists("TestQueue")) {     namespaceManager.CreateQueue(qd); }
How to Send message	// Create a message and add it to the queue. CloudQueueMessage message = new CloudQueueMessage("Hello, World"); queue.AddMessage(message);	string connectionString = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ConnectionString"); QueueClient Client = QueueClient.CreateFromConnectionString(connectionString, "TestQueue"); Client.Send(new BrokeredMessage());
How to Receive Message	// Get the next message CloudQueueMessage retrievedMessage = queue.GetMessage(); //Process the message in less than 30 seconds, and then delete the message queue.DeleteMessage(retrievedMessage);	BrokeredMessage message = Client.Receive(); if (message != null)    {       try       {          // Remove message from queue          message.Complete();       }       catch (Exception)       {          // Indicate a problem, unlock message in queue          message.Abandon();       }    }

 

基础功能

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Ordering guarantee	No	Yes - First-In-First-Out (FIFO) (through the use of messaging sessions)
Delivery guarantee	At-Least-Once	At-Least-Once At-Most-Once
Transaction support	No	Yes (through the use of local transactions)
Receive behavior	Non-blocking (completes immediately if no new message is found)	Blocking with/without timeout (offers long polling, or the “Comet technique”) Non-blocking (through the use of .NET managed API only)
Receive mode	Peek & Lease	Peek & Lock Receive & Delete
Exclusive access mode	Lease-based	Lock-based
Lease/Lock duration	30 seconds (default) 7 days (maximum)	60 seconds (default) 5 minutes (maximum)
Lease/Lock granularity	Message level (each message can have a different timeout value)	Queue level (each queue has a lock granularity applied to all of its messages, fixed for the lifetime of the queue)
Batched receive	Yes (explicitly specifying message count when retrieving messages, up to a maximum of 32 messages)	Yes (implicitly enabling a pre-fetch property or explicitly through the use of transactions)
Batched send	No	Yes (through the use of transactions or client-side batching)

 

高级功能

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Scheduled delivery	Yes	Yes
Automatic dead lettering	No	Yes
Message deferral	Yes (via in-place update of visibility timeout)	Yes (provided via a dedicated API function)
Poison message support	Yes	Yes
In-place update	Yes	No
Server-side transaction log	Yes	No
Storage metrics	Yes	No
Purge queue function	Yes	No
Message groups	No	Yes (through the use of messaging sessions)
Duplicate detection	No	Yes (configurable on the sender side)
WCF integration	No	Yes (offers out-of-the-box WCF bindings)
WF integration	Custom (requires building a custom WF activity)	Native (offers out-of-the-box WF activities)

 

容量和配额

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Maximum message size	64 KB (48 KB when using Base64 encoding)	256 KB (including both header and body, maximum header size: 64 KB)
Maximum queue size	100 TB (limited to a single storage account capacity)	1, 2, 3, 4 or 5 GB (defined upon creation of a queue)
Maximum message TTL	7 days	Unlimited
Maximum number of queues	Unlimited	10,000 (per service namespace, can be increased)
Maximum number of concurrent clients	Unlimited	Unlimited (100 concurrent connection limit only applies to TCP protocol-based communication)

 

管理和操作

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Management protocol	REST over HTTP/HTTPS	REST over HTTPS
Runtime protocol	REST over HTTP/HTTPS	REST over HTTPS TCP with TLS
.NET Managed API	Yes (.NET managed Storage Client API)	Yes (.NET managed brokered messaging API)
Java API	Yes	Yes
PHP API	Yes	Yes
Node.js API	Yes	No
Arbitrary metadata support	Yes	No
Queue naming rules	Up to 63 characters long [3,63] (letters in a queue name must be lowercase)	Up to 260 characters long (queue names are case-insensitive)
Get queue length function	Yes (approximate value)	Yes (exact, point-in-time value)
Peek function	Yes	No

 

性能

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Maximum throughput	Up to 2,000 messages per second	Up to 2,000 messages per second (based on benchmark with 1 KB messages)
Average latency	10 ms (with TCP Nagle disabled)	100 ms
Throttling behavior	Reject with HTTP 503 code (throttled requests are not treated as billable)	Reject with exception/HTTP 503 (throttled requests are not treated as billable)

 

授权和认证

Comparison Criteria	Windows Azure Queues	Service Bus Queues
Authentication	Symmetric key	ACS claims
Role-based access control	No	Yes (through the use of ACS roles)
Identity provider federation	No	Yes

工作流程

Azure Queue Message 流程

Service Bus Queue