System and method for performing consistent resynchronization between synchronized copies
US7979396B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2005 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Feb 19, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/27
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method involves detecting that a first storage device is inaccessible. The information stored on the first storage device is a synchronized copy of information stored on a second storage device. In response to detecting that the first storage device is inaccessible, modification logging is initiated. Modification logging involves detecting modifications to information stored on the second storage device and storing information that indicates an order in which the modifications occur to the second storage device. The stored information can indicate the order explicitly (e.g., by including a timestamp or sequence number) or indirectly (e.g., the order of entries stored in a log can indicate the order of the modifications represented by those entries). The stored information can also include the new values generated by the modifications. The stored information can then be used to resynchronize the information stored on the first and second storage devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.