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Huazhong University of Science and Technology Assigned Patent

Scheduling high speed cache of asymmetric disk array

Huazhong University of Science and Technology, Wuhan, China, has been assigned a patent (9,626,247) developed by Cao, Qiang, Wan, Shenggang, Wu, Si, and Xie, Changsheng, Wuhan, China, for a “method for scheduling high speed cache of asymmetric disk array.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A method for asymmetrically scheduling buffer cache of disk array. The method including: (1) detecting whether access from a upper layer is hit in a buffer cache, proceeding to, 7) if yes, and proceeding to (2) if no (2) detecting whether the buffer cache is full, proceeding to (3) if yes, and proceeding to (5) if no, (3) detecting whether the number of pages of a sacrificial disk is greater than a threshold, proceeding to (4) if yes, and proceeding to (6) if no, (4) selecting and replacing a cold page of the sacrificial disk, (5) buffering data requested by a user in a blank page in the buffer cache, (6) selecting and replacing all cold pages of the buffer cache, and (7) reading or writing the data, and changing positions or status thereof in pages of the buffer cache.

The patent application was filed on June 23, 2015 (14/746,869).

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