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.:
Date of Patent:
Jan. 09, 2018
Filed:
Sep. 30, 2014
Applicant:
Emc Corporation, Hopkinton, MA (US);
Inventors:
Xinlei Xu, Beijing, CN;
Yongjun Wu, Beijing, CN;
Thomas E. Linnell, Northborough, MA (US);
Xiongcheng Li, Beijing, CN;
Assignee:
EMC IP Holding Company LLC, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/08 (2016.01); G06F 3/06 (2006.01); G06F 12/02 (2006.01); G06F 12/0808 (2016.01);
U.S. Cl.
CPC ...
G06F 12/0808 (2013.01); G06F 3/0619 (2013.01); G06F 3/0665 (2013.01); G06F 3/0689 (2013.01); G06F 12/0246 (2013.01); G06F 2212/1032 (2013.01); G06F 2212/262 (2013.01); G06F 2212/285 (2013.01); G06F 2212/7209 (2013.01);
Abstract
A technique for managing a cache in a data storage system includes creating metadata that associates cache pages with respective data objects and storing the metadata in a location accessible to a manager of the cache. Upon a failure in the cache, the cache manager checks the metadata to identify any data objects for which the cache stores dirty pages. The cache manager then coordinates with other system resources to take the identified data objects offline.