Patent ID: 7305529
Filing Date: 2007-12-04
Classification: G06F,Y10S

Abstract:
1. A method comprising: modifying data in n data blocks of a data volume to create n modified data blocks; a primary node transmitting the n modified data blocks to n nodes, respectively, wherein each of the n nodes comprises a replica of the data volume prior to the modification of data in the n data blocks; a first node of the n nodes transmitting a copy of the modified data block copy it receives from the primary node to a second node of the n nodes; the second node overwriting data in its respective replica with the modified data block copy the second node receives from the primary node; the second node overwriting data in its respective replica with the copy of the modified data block copy transmitted by the first node; the second node transmitting a copy of the modified block copy it receives from the primary node to the first node.