Patent ID: 9235481
Filing Date: 2016-01-12
CPC Classification: G06F

Claim Text:
1. A computer program product for use in replication comprising: a non-transitory computer readable medium encoded with computer executable program code for replication of data, the code configured to enable the execution of: quiescing IO commands to sites of an active/active storage system, the active/active storage system having at least two storage sites communicatively coupled via a virtualization layer, wherein the virtualization layer enables cache coherency between each of the at least two storage sites, wherein the virtualization layer enables simultaneous, active/active, concurrent read/write access to a same virtual volume at both of the sites; creating a change set for the same virtual volume; unquiescing IO commands to the sites; transferring data of the change set to the other sites of the active/active storage system by the virtualization layer; and flushing the data to the sites.