Adaptive bandwidth distribution system for high-performance...

Details Adaptive bandwidth distribution system for high-performance... Adaptive bandwidth distribution system for high-performance...

2008-07-24

2011-11-15

Kindred, Alford (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

C710S054000, C710S056000

Reexamination Certificate

active

08060660

ABSTRACT:
A method for issuing shadow requests to manage bandwidth allocation between an application that issues input/output (I/O) operation requests and an I/O device. A bandwidth manager detects the completion of an I/O operation, which includes either a read operation or a write operation. The bandwidth manager calculates a statistical duration for future I/O operations between the application and the I/O device based on throughput statistics related to past I/O operations. The bandwidth manager generates a shadow request for reserving a position in a queue that stores pending I/O requests for the I/O device for a first future I/O operation request from the application and having a duration related to the statistical duration, and inserts the shadow request into the queue. Advantageously, applications that do not make frequent I/O operation requests in advance may still execute I/O operations because bandwidth is reserved for future I/O operation requests via the shadow requests.

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Notice of Allowance, U.S. Appl. No. 12/179,529, dtd. Apr. 19, 2010.
Notice of Allowance, U.S. Appl. No. 12/179,535, dtd. Mar. 26, 2010.

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