Application of log records to data compressed with different encoding scheme
US5897641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | May 13, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99953
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary database's log records are used to update a second database that has a different encoding scheme than the log record and the primary database. This encoding scheme, for example, may involve compression, encryption, or another data transformation. First, a stale encoded data record from the second database is identified. This data record is one whose counterpart in the primary database has been updated in the primary database and where update has been logged. The stale data record is modified to reflect its contents as encoded by the first encoding scheme rather than the second. Then, the logged change is applied to update the modified record. The updated record is then decoded and subsequently re-encoded according to the second encoding scheme. This record is then stored in the second database replacing the stale second data record.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.