Remote copy for a storage controller with reduced data size
US7167962B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2005 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Dec 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Two data centers located in the vicinity are connected using a synchronous transfer copy function, and one of the data centers is coupled with a third data center disposed at a remote location by an asynchronous remote copying function. The order whereat a storage sub-system located in the vicinity has received data from a host is consistently guaranteed, and the third data center holds the data. Further, each storage sub-system includes a function whereby, during normal operation, data can be exchanged and the data update state can be obtained by the storage sub-systems located in the two data centers that do not directly engage in data transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.