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:
Feb. 14, 2012
Filed:
Nov. 13, 2009
Ping LU, Mountain View, CA (US);
Ilia Langouev, Santa Cruz, CA (US);
Aleksey V. Pershin, Fremont, CA (US);
Sudarsan R. Piduri, Santa Clara, CA (US);
Erik Weathers, San Jose, CA (US);
Ping Lu, Mountain View, CA (US);
Ilia Langouev, Santa Cruz, CA (US);
Aleksey V. Pershin, Fremont, CA (US);
Sudarsan R. Piduri, Santa Clara, CA (US);
Erik Weathers, San Jose, CA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
Writes to blocks of a protected storage volume that occur between the beginning of a prior backup interval and the beginning of a current backup interval are tracked using a first snapshot that is maintained through the current backup interval. At the beginning of the current backup interval, a second snapshot is generated. Blocks that are indicated by a dirty block list of the first snapshot as having been changed are read from the snapshot volume for the second snapshot and copied to a backup storage volume. For the next backup interval, the second snapshot or alternatively, a newly generated third snapshot, is used to track writes to blocks of a protected storage volume that occur between the beginning of the current backup interval and the beginning of a next backup interval.