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:
Aug. 17, 2021
Filed:
Mar. 25, 2020
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Neeraj Bhutani, Milpitas, CA (US);
Ramprasad Chinthekindi, San Jose, CA (US);
Nitin Madan, Cupertino, CA (US);
Srikanth Srinivasan, Bangalore, IN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Data containers are stored at a first cloud and include file segments managed by a deduplication file system. Metadata containers are written to a log, identified by a container ID generated sequentially, and include references to data containers. An index is maintained to map segment fingerprints to container IDs. Upon starting a migration to a second cloud, a checkpoint is created identifying a container ID at a head of the log. During migration, the index is updated to map fingerprints of migrated segments to new container IDs, and referencing new data containers having the migrated segments and written to the second cloud. A request to read a file is received. The index is examined to identify a container ID associated with a data container storing segments of the file. Based on the identified container ID and the checkpoint, the data container is accessed from the first or second cloud.