US 12,436,850 B2
Data consistent freeze of peer-to-peer remote copy in a multiple computing cluster environment
William C. Shepard, Hyde Park, NY (US); Tabor R. Powelson, Poughkeepsie, NY (US); Tri M. Hoang, Poughkeepsie, NY (US); and Dale F Riedy, Poughkeepsie, NY (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed on Mar. 8, 2024, as Appl. No. 18/599,984.
Prior Publication US 2025/0284601 A1, Sep. 11, 2025
Int. Cl. G06F 11/16 (2006.01); G06F 11/20 (2006.01)
CPC G06F 11/1662 (2013.01) [G06F 11/2094 (2013.01); G06F 2201/805 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
freezing, by each of a first computing cluster and a second computing cluster, non-shared logical volumes of the first computing cluster and the second computing cluster;
freezing, by each of the first computing cluster and the second computing cluster, shared logical volumes of the first computing cluster and the second computing cluster, wherein a key logical volume is a last shared logical volume to be frozen of a set of peer-to-peer remote copy source volumes of the shared logical volumes;
selecting one of the first computing cluster and the second computing cluster to perform thaws of the shared logical volumes based on which of the first computing cluster or the second computing cluster was the last to freeze the key logical volume; and
thawing, by the selected one of the first computing cluster and the second computing cluster, the shared logical volumes.