Search International and National Patent Collections

1. (WO2018100455) ASYNCHRONOUS LOCAL AND REMOTE GENERATION OF CONSISTENT POINT-IN-TIME SNAP COPIES

Pub. No.:    WO/2018/100455    International Application No.:    PCT/IB2017/057067
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Tue Nov 14 00:59:59 CET 2017
IPC: G06F 17/30
Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION
IBM UNITED KINGDOM LIMITED
IBM (CHINA) INVESTMENT COMPANY LIMITED
Inventors: WARD, Matthew
LIPETS, Mark
CIARAVELLA, Anthony
GAGNER, Michael
BROWN, Theresa, Mary
MELLGREN, Carol
HARRIS JR, Theodore, Timothy
MCBRIDE, Gregory
CLAYTON, Nicolas, Marc
Title: ASYNCHRONOUS LOCAL AND REMOTE GENERATION OF CONSISTENT POINT-IN-TIME SNAP COPIES
Abstract:
Asynchronous local and remote generation of consistent first and second point-in-time snap copy volumes provides for generating in a primary system, a first point-in-time snap copy volume of a primary volume of the primary system, and generating in a secondary system, a second point-in-time snap copy volume utilizing a secondary volume in the secondary system. Mirror data from a first data unit(volume) to a second data unit at a remote location (610). Copy data of the first data unit to a third data unit to provide a point-in-time copy of the first data unit (614). Copy data of the second data unit to a fourth data unit to provide a point-in-time copy of the second data unit (620). Synchronize the fourth data unit to third data unit wherein both the third and fourth data units provide point-in-time copies of the data of the first data unit as of the first point-in-time (624). Synchronizing logic synchronizes the first and second point-in-time snap copy volumes to be consistent with each other as of a particular point-in-time notwithstanding an asynchronous mirror relationship between the primary volume of the primary system and the secondary volume of the secondary system.