Point-in-time copy on a remote system
US10956271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2020 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Jan 6, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/128
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method, according to one embodiment, includes: receiving existing data at a secondary storage volume in a secondary system from a primary storage volume in a primary system. In response to receiving a write request at the secondary system: a determination is made as to whether data corresponding to the write request will fully overwrite one or more of the regions in the secondary storage volume. A request is sent to the primary system for existing data corresponding to the secondary storage volume in response to determining that the data corresponding to the write request will not overwrite a portion of a region in the secondary storage volume. The requested existing data is received, and merged with the data corresponding to the write request. The merged data is further written to the one or more respective regions in the secondary storage volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.