如何增加Azure服务总线队列大小？

Question

I am trying to create a windows azure service bus queue with a maximum size of 20GB.

My understanding is that the maximum allowed size is 80GB, but I am not able to create a queue larger than 5GB if I use the "Custom Create" button or 16GB if I use the "Quick Create" button on Azure's portal.

I've also tried to do this pragmatically as follow:

if (!namespaceManager.QueueExists(queueName))
{
    var queueDescription = new QueueDescription(queueName)
    {
        MaxSizeInMegabytes = 20480,
        DefaultMessageTimeToLive = new TimeSpan(0, 1, 0, 0)
    };
    namespaceManager.CreateQueue(queueDescription);
}

But the following exception was thrown:

The remote server returned an error: (400) Bad Request. SubCode=40000. 
The specified value 20480 is invalid. 
The property MaxSizeInMegabytes, must be one of the following values: 
1024;2048;3072;4096;5120

Any ideas on how to create a service bus queue with a max size of 20GB?

Answer 1

It is pretty clear from the error message what are the possible options for a Service Bus Queue.

It can also clearly be seen from the official documentation on Service Bus Quotas and Limits . Besides, the size cannot be changed once the queue has been created!

UPDATE

After technically proving, creating a partitioned queue with Max Size of 5G gives actually a Queue with max size of 80G. Undocumented and unexpected, but that is the result: