Global server load balancing
US7657629B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2003 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Sep 25, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1012
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A global server load-balancing (GSLB) switch serves as a proxy to an authoritative DNS and communicates with numerous site switches that are coupled to host servers serving specific applications. The GSLB switch receives from site switches operational information regarding host servers within the site switches neighborhood. When a client program requests a resolution of a host name, the GSLB switch, acting as a proxy of an authoritative DNS, returns one or more ordered IP addresses for the host name. The IP addresses are ordered using metrics that include the information collected from the site switches or based on other metric information. Examples of metrics include weighted site, weighted IP, and active bindings metrics. The GSLB switch places the address that is deemed “best” at the top of the list.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.