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:
Apr. 03, 2012
Filed:
Mar. 19, 2007
Ganesh Venkitachalam, Mountain View, CA (US);
Alexander Moshchuk, Seattle, WA (US);
Ganesh Venkitachalam, Mountain View, CA (US);
Alexander Moshchuk, Seattle, WA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
Method and systems for real-time cloning of a virtual machine are described. A virtual machine is running and a clone of the virtual machine is created while the virtual machine continues to run. In one embodiment, the creation of the clone further comprises quiesceing the virtual machine, taking a snapshot S(excluding main memory) of the state of the virtual machine, and creating a copy Sof the snapshot S. The original VM continues execution off the snapshot S. The cloned VM restores from snapshot S. In another embodiment, the cloning of the virtual machine further comprises instructing a vmkernel associated with the virtual machine to mark all pages of main memory of the virtual machine as copy-on-write (COW). The unique ID corresponding to the main memory is provided by the vmkernel and an association between the unique ID and the main memory is made upon restoration of the clone.