How to guarantee azure queue FIFO

Question

I understand that MS Azure Queue service document http://msdn.microsoft.com/en-us/library/windowsazure/dd179363.aspx says first out (FIFO) behavior is not guaranteed.

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Answer 1

I don't know how fast do you want to process the messages, but if you need to have a real FIFO, don't allow Azure's queue to get more than one message at a time.

Use this at your "program.cs" at the top of the function.

    static void Main()
            {
                var config = new JobHostConfiguration();

                if (config.IsDevelopment)
                {
                    config.UseDevelopmentSettings();
                }
                config.Queues.BatchSize = 1; //Number of messages to dequeue at the same time.
                config.Queues.MaxPollingInterval = TimeSpan.FromMilliseconds(100); //Pooling request to the queue.


                JobHost host = new JobHost(config);

....your initial information...

            // The following code ensures that the WebJob will be running continuously
            host.RunAndBlock();

This will get one message at a time with a wait period of 100 miliseconds.

This is working perfectly with a logger webjob to write to files the traze information.