Continuous media priority aware storage scheduler

A method to schedule requests to a storage medium, comprising:

• determining a class for a request;
• moving the request to one of at least one class-specified queue;
• determining a latency requirement associated with a set of requests that includes the request;
• selecting a fixed size for a sweep Queue, in terms of a number of requests, based at least in part on the latency requirement;
• loading the sweep queue with a number of requests equaling the fixed size from the at least one class-specified queue, the sweep queue having the fixed size before updating the storage medium;
• and
• updating the storage medium in one or more rounds of data, the requests in each round ordered based upon the latency requirement and a desired throughput for the set of requests.

A computer-readable storage medium comprising a plurality of computer-executable software components, the plurality of computer-executable software components comprising:

• a categorizer component that automatically directs input/output requests, each input/output request being directed into a selected queue of a plurality of queues, each of the plurality of queues being in a class, the classes including classes of periodic and aperiodic queues, the selected queue having a class selected based on a priority of the input/output request;
• a scheduler component that transfers input/output requests from the class-specific queues to a sweep queue ordered in logical-block-address ordering, the sweep queue is scheduled to a storage medium in C-Look order in a plurality of rounds of input/output requests, the transferred rounds have a predetermined number of requests per round, the predetermined number of requests determined based at least in part upon a latency requirement, the latency requirement relates to a worst case scheduling time for one of the input/output requests;
• and
• an admission control component that checks performance parameters of a periodic input/output request against system resources and aborts the periodic input/output request before the scheduler component transfers the data to/from the sweep queue to the storage medium if the periodic input/output request exceeds system capabilities.