Method, computer program product, and system for migrating URLs within a dynamically changing distributed cache of URLs
US6377991B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1998 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | May 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1034
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method, computer program product, and system for migrating URL data objects in a proxy server array when an array member is removed, added, or temporarily unavailable. An array membership list containing array membership information is available at each proxy server in the array and at all enabled client that is used in conjunction with the URL as the information for identifying the correct proxy server where the URL data object resides. First, a deterministic hash value is computed for each proxy server name and the URL. Next, a combined hash value is computed that combines the URL hash value with each proxy server hash value. Finally, the proxy server with the highest “score” or combined hash value is identified as the proxy server where the desired URL data object should reside in local cache storage. Since the array membership list, the URL, and the hashing algorithm is the same at each proxy server or enabled client, the same proxy server will be identified as having the URL data object regardless of which proxy server originally receives or enabled client generates the URL data object request. The hashing algorithm is designed to automatically compensate for cha…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.