The queue input and output using a (priority article of manufacture, sent to the storage device (I / O) request methods, and systems, to determine whether to queue the I / O request with a priority to determine whether to put)

摘要

To provide articles of manufacture methods, and systems, to determine whether to queue input and output using the present invention relates priorities, sent to the storage device (I / O) requests. I measure the maximum number of concurrent requests that have been sent to [MEANS FOR SOLVING PROBLEMS] storage device. Using the maximum number of concurrent requests of the measured to determine the threshold for the specified priority. The forward subsequent requests of the specified priority which in response to determining that the current number of concurrent requests for a priority specified does not exceed the threshold determined on the specified priority, sent to the storage device make it possible to be. Make it possible to advance the subsequent request sent to the storage device having a higher priority than the priority specified. Queuing subsequent requests sent to the storage device in response to determining that the current number of concurrent requests for a priority specified exceeds the threshold value overall, and has a specified priority. [Selection Figure Figure 4