Global traffic management system using IP anycast routing and dynamic load-balancing
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United States of America Patent
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Aug 11, 2009
Grant Date -
N/A
app pub date -
Jan 19, 2005
filing date -
Jul 19, 2000
priority date (Note) -
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Abstract
A method and apparatus for serving content requests using global and local load balancing techniques is provided. Web site content is cached using two or more point of presences (POPs), wherein each POP has at least one DNS server. Each DNS server is associated with the same anycast IP address. A domain name resolution request is transmitted to the POP in closest network proximity for resolution based on the anycast IP address. Once the domain name resolution request is received at a particular POP, local load balancing techniques are performed to dynamically select the appropriate Web server at the POP for use in resolving the domain name resolution request. Approaches are described for handling bursts of traffic at a particular POP, security, and recovering from the failure of various components of the system.
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