Konrad Raynes Davda & Victor LLP
Asynchronous local and remote generation of consistent point-in-time snap copies in consistency groups
One general aspect of asynchronous local and remote generation of consistent point-in-time snap copies in consistency groups in accordance with the present description, is directed to receiving a local-remote pair point-in-time snap copy establish command to establish a local point-in-time snap copy in a local data storage system, and a remote point-in-time snap copy in a remote data storage system. In one aspect, establishment of the remote point-in-time snap copy relationship may be delayed as a function of the state of a consistency group formation process upon receipt of the local-remote pair point-in-time snap copy establish command. As a result, consistency of the local-remote pair of point-in-time snap copies may be realized, notwithstanding an asynchronous relationship between the local and remote storage systems. Other features and aspects may be realized, depending upon the particular application.
INTERNATIONAL BUSINESS MACHINES CORPORATION
G G G G G G G G G G
G06F G06F G06F G06F G06F G06F G06F G06F G06F G06F
inventional inventional inventional inventional inventional additional inventional inventional inventional additional
Nicolas M. Matthew J. Gregory E. Carol S. Nedlaya Y. Damian Theresa M. Theodore T. Joshua J.
Clayton Ward McBride Mellgren Francisco Trujillo Brown Harris, Jr. Crawford