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:
Jun. 09, 2015
Filed:
Apr. 18, 2012
Srikumar Subramanian, Newark, CA (US);
Raja Jayaraman, Fremont, CA (US);
Jomy Maliakal, Newark, CA (US);
Udita Chatterjee, Kolkatta, IN;
Srikumar Subramanian, Newark, CA (US);
Raja Jayaraman, Fremont, CA (US);
Jomy Maliakal, Newark, CA (US);
Paresh Chatterjee, Fremont, CA (US);
American Megatrends, Inc., Norcross, GA (US);
Abstract
Systems and methods for maintaining data consistency across mirrored storage nodes. Data consistency may be maintained in networked storage environments using a timestamp of an I/O in the primary and secondary servers (also referred to as nodes) in synchronous replication to re-synchronize the data efficiently, without much performance drop and while reducing the memory footprint. According to an aspect presented herein, data consistency is maintained in a mirror node by timestamping the I/O for a volume's logical territory in both the primary and secondary nodes. The timestamp acts as a watermark. Thus, whenever a disaster or failure occurs, the watermark point determines the re-synchronization point.