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Point of presence management in request routing

  • US 10,097,398 B1
  • Filed: 09/28/2010
  • Issued: 10/09/2018
  • Est. Priority Date: 09/28/2010
  • Status: Active Grant
First Claim
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1. A computer-implemented method to process content requests comprising:

  • obtaining, by a content delivery network (CDN) service provider, at a first domain name system (DNS) server, a DNS query from a client computing device, wherein the DNS query corresponds to a requested resource and comprises an original uniform resource locator (URL);

    identifying, at the first DNS server, two or more alternative DNS servers operative to receive DNS queries;

    responsive to the DNS query, determining performance measurement information for the two or more alternative DNS servers;

    selecting a second DNS server from the identified two or more alternative DNS servers, the second DNS server being selected based, at least in part, on a comparison of the performance measurement information relative to a minimum performance threshold;

    obtaining an alternative URL corresponding to the selected second DNS server, wherein the alternative URL is different from the original URL, wherein the original URL includes information identifying a first domain corresponding to the CDN service provider, and wherein the alternative URL includes information identifying a second domain corresponding to the CDN service provider;

    transmitting the alternative URL to the client computing device;

    obtaining, by the CDN service provider, a subsequent DNS query from the client computing device at the selected second DNS server, wherein the subsequent DNS query corresponds to the alternative URL provided by the CDN service provider.

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