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:
May. 12, 2020
Filed:
Sep. 01, 2017
International Business Machines Corporation, Armonk, NY (US);
Scott T. Marcotte, Poughkeepsie, NY (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
A memory-only snapshot of a file is disclosed that can be used by a system to perform a read of the file without disrupting other systems from reading or writing to the file. The in-memory snapshot structure includes a copy of allocation information of the file that points to the file data and be can be used by a backup application to read a file. A lock manager is provided that is configured to include an output parameter for file locks that includes allocation information associated with the in-memory file snapshot, thereby notifying a writer to the file that it must perform copy-on operations. A free space manager is also provided that is configured to track pinned blocks so as to both allow a write to a file to free snapshot blocks, while also preventing the freed blocks from being allocated to other files until backup read processing is completed.