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:
Dec. 01, 2020
Filed:
Oct. 06, 2017
Emc Ip Holding Company Llc, Hopkinton, MA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
An overlay snap is generated by generating a snapshot of a logical storage volume, writing a data stream to the overlay snap, generating pointers indicating locations of new data written to the overlay snap, and generating null pointers for locations that do not have new data written to the overlay snap. The overlay snap comprises the pointers and the null pointers. The overlay snap may be applied to a volume to generate a current snapshot of the volume. The overlay snap may be used maintain write order fidelity during continuous data replication by creating a copy of a snapshot on a target storage device and writing new data to an overlay snap on the target storage device.