Patent · US Active

System availability in PPRC failover environments

US9298567B2 · kind B2 · utility

22Cited by

5References

20Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

David R. Blea · Tucson, US
Tri M. Hoang · Clifton, US
Gregory E. McBride · Vail, US
Carol S. Mellgren · Tucson, US
Tabor R. Powelson · Poughkeepsie, US
William J. Rooney · Hopewell Junction, US

Key dates

Filing date	Aug 12, 2014
Grant date	Mar 29, 2016
Priority date	—
Expiry date	Oct 18, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG06F11/2076
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method for improving system availability in data replication environments is disclosed herein. In one embodiment, such a method includes detecting a suspend trigger, where the suspend trigger indicates that data mirroring between a primary volume and a secondary volume has been suspended. The method further detects a swap trigger some time after detecting the suspend trigger. The swap trigger indicates that I/O directed to the primary volume has failed. In the event the swap trigger is detected within a specified amount of time after detecting the suspend trigger, the method redirects I/O from the primary volume to the secondary volume. A corresponding system and computer program product are also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.