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:
Nov. 04, 2008
Filed:
Dec. 30, 2005
Applicant:
Anthony Cannon, Mountain View, CA (US);
Inventor:
Anthony Cannon, Mountain View, CA (US);
Assignee:
VMware, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mechanism is provided to maintain multiple copies of a virtual disk associated with a virtual machine by a synchronization function. The content of a first virtual disk is maintained, as a copy, at a second virtual disk by maintaining a record of the changes made to the first virtual disk and transferring only the changed data to the second. A disk change map represents the changed portions of the first virtual disk and is used to determine the content that must be transferred. Only data that differs between the two virtual disks is transferred thereby reducing the amount of data that needs to be transmitted.