US 11,657,068 B2
Efficient migration between asynchronous data replication technologies
Joshua J. Crawford, Tucson, AZ (US); Gregory E. McBride, Vail, AZ (US); Warren K. Stanley, Loveland, CO (US); and Matthew J. Ward, Vail, AZ (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Dec. 15, 2017, as Appl. No. 15/842,887.
Prior Publication US 2019/0188310 A1, Jun. 20, 2019
Int. Cl. G06F 16/27 (2019.01); G06F 16/23 (2019.01); G06F 11/20 (2006.01)
CPC G06F 16/273 (2019.01) [G06F 11/2074 (2013.01); G06F 11/2094 (2013.01); G06F 16/2365 (2019.01); G06F 2201/805 (2013.01); G06F 2201/82 (2013.01); G06F 2201/855 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for migrating from a first asynchronous data replication technology to a second asynchronous data replication technology, the method comprising;
utilizing a host-based software component to asynchronously replicate data from a primary volume to a secondary volume, the host-based software component executing on a host system;
initiating, at time T1, tracking of post-T1 changes to the primary volume;
waiting for all pre-T1 changes to the primary volume to be propagated to the secondary volume;
when all pre-T1 changes have been propagated to the secondary volume, suspending operation of the host-based software component;
replicating all post-T1 changes from the primary volume to the secondary volume;
utilizing an enterprise-storage-system-based software component to asynchronously replicate data from the primary volume to the secondary volume without assistance from the host-based software component, the enterprise-storage-system-based software component executing on an enterprise storage system, the enterprise storage system having different hardware and functionality than the host system; and
terminating utilization of the host-based software component to asynchronously replicate data from the primary volume to the secondary volume.