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. 20, 2021
Filed:
Sep. 29, 2016
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Yaming Kuang, Shanghai, CN;
Yunfei Chen, Shanghai, CN;
Philippe Armangau, Acton, MA (US);
Kamakshi Viswanadha, Lexington, MA (US);
Yubing Wang, Southborough, MA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Processing for a file system may include determining an inconsistency between a data log and inodes (index nodes) of the file system. Responsive to determining the inconsistency, recovery processing may be performed including first processing of the data log, second processing of the inodes of the file system, and third processing of the data log after said second processing. First processing may, for each entry of the data log that records a create snapshot operation to create a snapshot of a file having an associated inode of the file system that is a dirty snapshot inode, marking the associated inode as 'snap validated'. Second processing may include freeing each dirty snapshot inode not marked as 'snap validated'. Third processing may include freeing any entry of the data log where the entry references dirty snapshot inode freed by the second processing.