Michael Padovano - Bridgewater NJ, US Michael G. Byrnes - Bridgewater NJ, US Charles E. Christian - Bridgewater NJ, US Laura Clemens - Colorado Springs CO, US Rodger Daniels - Boise ID, US Deborah Levinson - Colorado Springs CO, US Susan Spence - Palo Alto CA, US Christopher Stroberger - Colorado Springs CO, US
International Classification:
G06F 17/30
US Classification:
707201
Abstract:
In one embodiment, a method for bitmap based synchronization of a source volume and a target volume comprises obtaining, in a source controller, a synchronization timestamp, and for one or more bits in a bitmap representing the source volume, transmitting a synchronization request to the target volume, wherein the synchronization request comprises the synchronization timestamp, receiving a reply from the target volume, and clearing the bit in the bitmap in response to the reply from the target volume.
Michael Padovano - Englishtown NJ, US Michael Byrnes - Dunellen NJ, US Charles Christian - Basking Ridge NJ, US Laura Clemens - Colorado Springs CO, US Rodger Daniels - Boise ID, US Donald Fraser - Colorado Springs CO, US Deborah Levinson - Colorado Springs CO, US James Reuter - Colorado Springs CO, US Susan Spence - Palo Alto CA, US Christopher Stroberger - Colorado Springs CO, US
International Classification:
G06F 17/30
US Classification:
707204000
Abstract:
In a storage system, at least three storage sites are arranged in a full mirroring relationship using a virtual connection between instances of a storage group on two of the sites whereby no user data is transmitted.
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