Background cache synchronization
US6553409B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1999 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Two new cache control headers in the cache control header, “post-check” and “pre-check”, enable the display of content from the cache, with a later synchronization of the content performed in the background via a conditional request such as an IMS request. These headers enable the server to define a non-validate time period relative to the cached content's age in which the user will receive content from the cache, a background synchronization period in which the user will receive content from the cache and automatically queue a request for background synchronization thereof, and a validate period in which the cached content may or may not be used, depending on a response to a validation request sent to the server. The content is quickly rendered for the user in the non-validate and background synchronization periods, and the hit count is correct in the background synchronization and validate periods. In the background synchronization time period, the user has a fast experience with rapidly rendered content, while via the background synchronization, the server receives the proper number of hits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.