US 12,386,857 B2
Remote copy management
Tomohiro Kawaguchi, Santa Clara, CA (US)
Assigned to HITACHI VANTARA, LTD., Yokohama (JP)
Filed by HITACHI VANTARA, LTD., Yokohama (JP)
Filed on Sep. 26, 2023, as Appl. No. 18/372,930.
Prior Publication US 2025/0103614 A1, Mar. 27, 2025
Int. Cl. G06F 16/27 (2019.01); G06F 11/14 (2006.01)
CPC G06F 16/273 (2019.01) [G06F 11/1464 (2013.01); G06F 2201/84 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method comprising:
for an execution of a remote copy operation from a primary storage system to a secondary storage system:
calculating lag time from a current time and latest copy time received during the execution of the remote copy operation;
for the calculated lag time exceeding a threshold limit set in a policy, suspending one or more remote copy pairs based on a tier of the one or more remote copy pairs; and
for a determination to resynchronize a highest priority one of the suspended one or more remote copy pairs based on available bandwidth and the tier of the one or more remote copy pairs:
taking a snapshot of corresponding volumes in the secondary storage system associated with the highest priority one of the suspended one or more remote copy pairs; and
resynchronizing the highest priority one of the suspended one or more remote copy pairs after the snapshot is taken.