Patent · US Active

Using a cascade flag to process a copy relationship having a backward cascade copy relationship

US9983815B1 · kind B1 · utility

3Cited by

14References

23Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Theresa M. Brown · Tucson, US
Nedlaya Y. Francisco · Tucson, US
Suguang Li · Tucson, US
Mark L. Lipets · Tucson, US
Gregory E. McBride · Vail, US
Carol S. Mellgren · Tucson, US
Raul E. Saba · Tucson, US

Key dates

Filing date	Dec 7, 2016
Grant date	May 29, 2018
Priority date	—
Expiry date	Dec 7, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG06F11/1469
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Provided are a computer program product, system, and method for using a cascade flag to process a copy relationship having a backward cascade copy relationship. Each of a plurality of copy relationships indicates to copy source data to target data and has a cascade flag. The cascade flag for a forward copy relationship of the copy relationships is set to a first value in response to determining that the source data for the forward copy relationship comprises target data for a backward copy relationship and that a background copy operation specified to copy source data to target data of the backward copy relationship has not completed. The cascade flag for the forward copy relationship is set to a second value in response to determining that the backward copy relationship does not have an uncompleted background copy operation.

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