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:
Sep. 15, 2015
Filed:
Dec. 28, 2011
Philippe Armangau, Acton, MA (US);
Jean-pierre Bono, Westborough, MA (US);
Sitaram Pawar, Shrewsbury, MA (US);
Christopher Seibel, Walpole, MA (US);
Yubing Wang, Holden, MA (US);
Philippe Armangau, Acton, MA (US);
Jean-Pierre Bono, Westborough, MA (US);
Sitaram Pawar, Shrewsbury, MA (US);
Christopher Seibel, Walpole, MA (US);
Yubing Wang, Holden, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A method is used in managing global data caches for file systems. Space is allocated in a volatile memory of a data storage system to a global data cache that is configured to store a set of data objects for a plurality of different file systems. The set of data objects is accessed by the plurality of different file systems. Contents of a file of a file system are stored in a data object in the global data cache upon receiving a write I/O request for the file. A copy of the data object and information for the data object are stored in a persistent journal that is stored in a non-volatile memory of the data storage system. Contents of the file are updated on a storage device based on the data object stored in the global data cache and information stored in the persistent journal.