Patent · US Active

Multiple incremental virtual copies

US8433870B2 · kind B2 · utility

2Cited by

9References

14Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Michael T. Benhase · Tucson, US
Theresa M. Brown · Tucson, US
Lokesh M. Gupta · Tucson, US
Rivka M. Matosevich · Zichron Ya'akov, IL
Carol S. Mellgren · Tucson, US
Gail A. Spear · Tucson, US

Key dates

Filing date	Oct 12, 2010
Grant date	Apr 30, 2013
Priority date	—
Expiry date	Dec 30, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG06F11/1451
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Provided are techniques for, in response to establishing each incremental virtual copy from a source to a target, creating a target change recording structure for the target. While performing destage to a source data block at the source, it is determined that there is at least one incremental virtual copy target for this source data block. For each incremental virtual copy relationship where the source data block is newer than the incremental virtual copy relationship and an indicator is set in a target inheritance structure on the target for a corresponding target data block, the source data block is copied to each corresponding target data block, and an indicator is set in each target change recording structure on each target for the target data block corresponding to the source data block being destaged.

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