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:
Apr. 14, 2020
Filed:
Mar. 31, 2016
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Xinlei Xu, Beijing, CN;
Liam Xiongcheng Li, Beijing, CN;
Lifeng Yang, Beijing, CN;
Jian Gao, Beijing, CN;
Lili Chen, Hopkinton, MA (US);
Ruiyong Jia, Beijing, CN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Described are techniques for data caching. Dirty cached data of a first logical address may be stored in a secondary cache included in multiple caching layers. The multiple caching layers may also include a primary data cache. Two copies of the dirty cached data may be stored in two different cache pages on two different physical devices of the secondary cache. The two cache pages may be marked as dirty indicating that data stored in the cache pages of the secondary cache is a more recent copy of data stored at the first logical address than other data stored on first non-volatile physical storage. Clean cached data of a second logical address may also be stored in the secondary cache where a single copy of the clean cached data is stored in physical storage of the secondary cache.