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. 11, 2021
Filed:
Dec. 16, 2017
Vmware, Inc., Palo Alto, CA (US);
Abhishek Gupta, Sunnyvale, CA (US);
Jorge Guerra Delgado, Fremont, CA (US);
Kapil Chowksey, Cupertino, CA (US);
Sandeep Rangaswamy, Mountain View, CA (US);
Srinath Premachandran, Fremont, CA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
The subject matter described herein is generally directed towards tracking and recovering a disk allocation state. An on-disk log of operations is maintained to describe operations performed to an in-memory partial reference count map. Upon a crash of a host computing device during a checkpoint operation to an on-disk complete reference count map, the on-disk log of operations is used to undo and then redo the operations, or just redo the operations. In this manner, a disk allocation state prior to the crash is recreated in the on-disk complete reference count map with atomicity and crash consistency.