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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10860496 B1

PDFFull Text
Date of Patent:
Dec. 08, 2020

Filed:

Apr. 17, 2018

Method, apparatus and computer readable medium for building multi-tier flash cache by using spare flash drives and clean user data is flushed from main flash cache to one of the spare flash drives that only stores the clean user data, wherein the main flash cache is configured as one or more pairs of flash drives and the one of the spare flash drives is allocated as single drive to secondary flash cache

Applicant:

Emc Ip Holding Company, Hopkinton, MA (US);

Inventors:

Liam Li, Beijing, CN;

Xinlei Xu, Beijing, CN;

Jian Gao, Beijing, CN;

Lifeng Yang, Beijing, CN;

Ruiyong Jia, Beijing, CN;

Yousheng Liu, Beijing, CN;

Assignee:

EMC IP Holding Company LLC, Hopkinton, MA (US);

Attorney:

BainwoodHuang

Primary Examiner:

William B Partridge

Assistant Examiner:

Chie Yew

Int. Cl.
CPC ...
G06F 12/0897 (2016.01); G06F 12/122 (2016.01);
U.S. Cl.
CPC ...
G06F 12/0897 (2013.01); G06F 12/122 (2013.01); G06F 2212/1024 (2013.01); G06F 2212/222 (2013.01); G06F 2212/225 (2013.01); G06F 2212/262 (2013.01);
Abstract

A computer-implemented method for establishing a multi-tier flash cache using spare drives. The method includes, in response to receiving an I/O request, determining that there is no free page in a main cache. Having determined that there is no free page in the main cache, the method further includes establishing a secondary cache by selecting at least one spare drive from a plurality of spare drives, flushing data from a cold page in the main cache to the secondary cache, an access frequency of the cold page being lower than a predetermined threshold, and writing data related to the I/O request from a persistent storage device to the cold page.

Find Patent Forward Citations

Li, Liam. (2020). Method, apparatus and computer readable medium for building multi-tier flash cache by using spare flash drives and clean user data is flushed from main flash cache to one of the spare flash drives that only stores the clean user data, wherein the main flash cache is configured as one or more pairs of flash drives and the one of the spare flash drives is allocated as single drive to secondary flash cache (U.S. Patent No. 10860496). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10860496

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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