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, 2009
Filed:
May. 16, 2002
Suchitra Raman, Winchester, MA (US);
Philippe Armangau, Acton, MA (US);
Milena Bergant, North Grafton, MA (US);
Raymond A. Angelone, Norfolk, MA (US);
Jean-pierre Bono, Westboro, MA (US);
Uresh Vahalia, Newton, MA (US);
Uday K. Gupta, Westford, MA (US);
Suchitra Raman, Winchester, MA (US);
Philippe Armangau, Acton, MA (US);
Milena Bergant, North Grafton, MA (US);
Raymond A. Angelone, Norfolk, MA (US);
Jean-Pierre Bono, Westboro, MA (US);
Uresh Vahalia, Newton, MA (US);
Uday K. Gupta, Westford, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Consistent updates are made automatically over a wide-area IP network, concurrently with read-only access to the remote copies. A replication control protocol (RCP) is layered over TCP/IP providing the capability for a remote site to replicate and rebroadcast blocks of the remote copy data to specified groups of destinations, as configured in a routing table. A volume multicast layer over RCP provides for multicasting to specified volume extents of the blocks. The blocks are copied at the logical level, so that it does not matter what physical structure is used for storing the remote copies. Save volumes buffer the remote copy data transmitted between the primary or secondary file system volume and the IP network, in order to ensure independence between the replication process, the IP transport method, and the primary file system being replicated.