Point of presence management in request routing
First Claim
1. A computer-implemented method for request routing comprising:
- obtaining a DNS query from a client computing device at a first DNS server, wherein the DNS query corresponds to a requested resource associated with an original resource identifier provided by a content provider and wherein the first DNS server corresponds to a content delivery network service provider that is different from the content provider;
selecting a second DNS server from one or more alternative DNS servers based at least in part on at least a calculated distance associated with each of the one or more alternative DNS servers and performance measurement information associated with each of the one or more alternative DNS servers;
obtaining an alternative resource identifier corresponding to the selected second DNS server, wherein the alternative resource identifier includes information for causing a DNS query to resolve to a domain corresponding to the content delivery service provider;
transmitting the alternative resource identifier to the client computing device;
obtaining a subsequent DNS query from the client computing device at a second DNS server, wherein the subsequent DNS query corresponds to the alternative resource identifier provided by the content delivery network service provider and wherein the second DNS server corresponds to the content delivery network service provider that is different from the content provider;
determining whether the second DNS server is authoritative to the subsequent DNS query;
selecting a cache component for providing content associated with the original resource request if the second DNS server is authoritative to the subsequent DNS query; and
transmitting information identifying the selected cache component if the second DNS server is determined to be authoritative.
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Abstract
A system and method for the management of client computing device DNS queries and subsequent resource requests within a content delivery network service provider domain are provided. The management of the DNS queries can include the selection of computing devices corresponding to various Point of Presence locations for processing DNS queries. Additionally, the management of the content requests can include the selection of computing devices corresponding to resource cache components corresponding to various Point of Presence locations for providing requested content. The selection of the computing devices can incorporate logic related to geographic criteria, performance threshold criteria, testing criteria, and the like.
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Citations
25 Claims
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1. A computer-implemented method for request routing comprising:
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obtaining a DNS query from a client computing device at a first DNS server, wherein the DNS query corresponds to a requested resource associated with an original resource identifier provided by a content provider and wherein the first DNS server corresponds to a content delivery network service provider that is different from the content provider; selecting a second DNS server from one or more alternative DNS servers based at least in part on at least a calculated distance associated with each of the one or more alternative DNS servers and performance measurement information associated with each of the one or more alternative DNS servers; obtaining an alternative resource identifier corresponding to the selected second DNS server, wherein the alternative resource identifier includes information for causing a DNS query to resolve to a domain corresponding to the content delivery service provider; transmitting the alternative resource identifier to the client computing device; obtaining a subsequent DNS query from the client computing device at a second DNS server, wherein the subsequent DNS query corresponds to the alternative resource identifier provided by the content delivery network service provider and wherein the second DNS server corresponds to the content delivery network service provider that is different from the content provider; determining whether the second DNS server is authoritative to the subsequent DNS query; selecting a cache component for providing content associated with the original resource request if the second DNS server is authoritative to the subsequent DNS query; and transmitting information identifying the selected cache component if the second DNS server is determined to be authoritative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computer-implemented method for request routing comprising:
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obtaining a DNS query from a client computing device at a first DNS server, wherein the DNS query corresponds to a requested resource associated with an original resource identifier provided by a content provider and wherein the first DNS server corresponds to a content delivery network service provider that is different from the content provider; obtaining an alternative resource identifier based at least in part on at least a calculated distance associated with each of one or more alternative network components and performance measurement information associated with each of the one or more alternative network components; determining whether the first DNS server would be authoritative for a DNS query corresponding to the alternative resource identifier; selecting a cache component for providing content associated with the original resource request if the first DNS server would be authoritative for a DNS query corresponding to the alternative resource identifier; and transmitting information identifying the selected cache component if the first DNS server would be authoritative for a DNS query corresponding to the alternative resource identifier. - View Dependent Claims (13)
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14. A system for request routing comprising:
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a first network point of presence associated with a content delivery network service provider, wherein the first network point of presence includes a DNS server that is operative to; obtain a DNS query from a client computing device, wherein the DNS query corresponds to a requested resource associated with an original resource identifier provided by a content provider and wherein the content delivery network service provider is different from the content provider; select a second DNS server from one or more alternative DNS servers based at least in part on at least a calculated distance associated with each of the one or more alternative DNS servers and performance measurement information associated with each of the one or more alternative DNS servers; obtain an alternative resource identifier corresponding to the selected second DNS server, wherein the alternative resource identifier includes information for causing a DNS query to resolve to a domain corresponding to the content delivery service provider; and transmit the alternative resource identifier to the client computing device; a second network point of presence associated with the content delivery network service provider, wherein the second network point of presence includes the second DNS server and wherein the second DNS server is operative to; obtain a subsequent DNS query from the client computing device, wherein the subsequent DNS query corresponds to the alternative resource identifier provided by the content delivery network service provider; determine whether the second DNS server is authoritative to the subsequent DNS query; select a cache component for providing content associated with the original resource request if the second DNS server is authoritative to the subsequent DNS query; and transmit information identifying the selected cache component if the second DNS server is determined to be authoritative. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for request routing comprising:
a first network point of presence associated with a content delivery network service provider, wherein the first network point of presence includes a first DNS server that is operative to; obtain a DNS query from a client computing device, wherein the DNS query corresponds to a requested resource associated with an original resource identifier provided by a content provider and wherein the content delivery network service provider is different from the content provider; obtain an alternative resource identifier based at least in part on at least a calculated distance associated with each of one or more alternative network components and performance measurement information associated with each of the one or more alternative network components; determine whether the first DNS server would be authoritative for a DNS query corresponding to the alternative resource identifier; select a cache component for providing content associated with the original resource request if the first DNS server would be authoritative for a DNS query corresponding to the alternative resource identifier; and transmit information identifying the selected cache component if the first DNS server would be authoritative for a DNS query corresponding to the alternative resource identifier. - View Dependent Claims (24, 25)
Specification