Copy-on-read process in disaster recovery
US10162720B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2017 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Nov 1, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and program products are configured to perform a method for copy-on-read in disaster recovery (DR). The method includes: making a DR storage volume available at a DR system for read access before all data from a corresponding primary storage volume has been copied to the DR storage volume; maintaining a record of regions of the DR storage volume; and responsive to receiving a read request for data at the DR system: looking up the record of regions of the DR storage volume to determine available data for the read request; reading any available data from the DR storage volume; for any data unavailable at the DR storage volume, obtaining the unavailable data from the corresponding primary storage volume; updating the DR storage volume with obtained data; supplying obtained data to the read request; and updating the record of regions of the DR storage volume for regions of obtained data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.