单选题You are designing a Windows Azure application. The application includes two web roles and three instances of a worker role. The web roles will send requests to the worker role through one or more Windows Azure Queues. You have the following requirements： - Ensure that each request is processed exactly one time. - Minimize the idle time of each worker role instance. - Maximize the reliability of request processing. You need to recommend a queue design for sending requests to the worker role. What should you recommend？（）A Create a single queue. Send requests on the single queue.B Create a queue for each web role. Send requests on all queues at the same time.C Create a queue for each workerrole instance. Send requests on each worker queue in a round robin.D Create a queue for each combination of web roles and worker role instances. Send requests to all worker role instances based on the sending web role.
单选题
You are designing a Windows Azure application. The application includes two web roles and three instances of a worker role. The web roles will send requests to the worker role through one or more Windows Azure Queues. You have the following requirements： - Ensure that each request is processed exactly one time. - Minimize the idle time of each worker role instance. - Maximize the reliability of request processing. You need to recommend a queue design for sending requests to the worker role. What should you recommend？（）
A
Create a single queue. Send requests on the single queue.
B
Create a queue for each web role. Send requests on all queues at the same time.
C
Create a queue for each workerrole instance. Send requests on each worker queue in a round robin.
D
Create a queue for each combination of web roles and worker role instances. Send requests to all worker role instances based on the sending web role.
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