Patent · US Active

Virtual machine fault tolerance

US10579485B2 · kind B2 · utility

1Cited by

12References

20Claims

0Family size

Assignee

VMware LLC · US

Inventors

Ganesh Venkitachalam · Mountain View, US
Rohit Jain · New Delhi, IN
Boris Weissman · Palo Alto, US
Daniel J. Scales · Mountain View, US
Vyacheslav V. Malyugin · Palo Alto, US
Jeffrey W. Sheldon · Los Altos, US
Min Xu · Lo Wu, CN

Key dates

Filing date	Oct 3, 2016
Grant date	Mar 3, 2020
Priority date	—
Expiry date	Oct 3, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG06F2201/82
WIPO fieldComputer technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.