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:
Mar. 03, 2020
Filed:
Oct. 03, 2016
Vmware, Inc., Palo Alto, CA (US);
Ganesh Venkitachalam, Mountain View, CA (US);
Rohit Jain, Mountain View, CA (US);
Boris Weissman, Palo Alto, CA (US);
Daniel J. Scales, Mountain View, CA (US);
Vyacheslav Vladimirovich Malyugin, Los Gatos, CA (US);
Jeffrey W. Sheldon, Mountain View, CA (US);
Min Xu, Palo Alto, CA (US);
VMWARE, INC., Palo Alto, CA (US);
Abstract
In a computer system running at least a first virtual machine (VM) and a second VM on virtualization software, a computer implemented method for the second VM to provide quasi-lockstep fault tolerance for the first VM includes executing a workload on the first VM and the second VM that involves producing at least one externally visible output and comparing an externally visible output of the second VM with an externally visible output of the first VM to determine if there is an output match. In response to a determination that the externally visible output of the second VM does not match the externally visible output of the first VM, a resynchronization of the second VM is executed. The externally visible output of the first VM is kept from being output externally until completion of the resynchronization.