Pseudo proxy server

• US 8,312,099 B1
• Filed: 09/30/2005
• Issued: 11/13/2012
• Est. Priority Date: 12/22/1998
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Blewett, Charles Douglas
• Primary Examiner(s): Dinh, Khanh
• Application Number:
  US11/239,888
• Time in Patent Office: 2,601 Days
• Field of Search: 709/203, 709/219, 709/225, 709/238, 709/218, 709/229, 709/224, 709/228, 709/226, 709/227, 709/220, 370/230
• US Class Current: 709/213
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1012 based on compliance of requirements or conditions with available server resources
• CPC Class Codes: H04L 67/1017 based on a round robin mechanism
• CPC Class Codes: H04L 67/1038 Load balancing arrangements to avoid a single path through a load balancer

Abstract

A pseudo proxy server is provided for a host network when the host network experiences periods of congestion. The host network determines whether an arrival rate of data requests exceeds a predetermined threshold. If so, the host network adds an address of a pseudo proxy server to a list of servers aliased to the host network. Thereafter, data requests are routed to the pseudo proxy server on a round robin basis. The pseudo proxy server may be engaged without first loading information content from the host network on the pseudo proxy server.

Claims

1. A method for use by a server that has been caused to fulfill requests for data items that would otherwise be fulfilled by a content source that stores the data items, the server having been caused to fulfill the requests responsive to a determination that additional capacity for fulfilling the requests is needed, the method comprising:

the server receiving the requests via the Internet,

the server making a determination as to whether it possesses each data item requested of it;

if the determination is that the server does not possess a requested data item, the server, in response to its said determination, obtaining the requested data item from the content source; and

the server fulfilling the request for the requested data item upon obtaining the requested data item from the content source,

wherein the server and the content source are connected to the Internet,

and wherein the requests originate from client terminals that are connected to the Internet via other than the server and via other than the content source.

2. The invention of claim 1 wherein one of the requests via the Internet for at least one of the data items is received by the server prior to the server having received at least one of the data items from the content source.

3. The invention of claim 1 wherein the server carries out the method only subsequent to receiving a recruiting message indicating that it should fulfill requests for said data items stored at the content source.

4. The invention of claim 2 wherein the server carries out the method only subsequent to receiving a recruiting message indicating that it should fulfill requests for said data items stored at the content source.

5. The invention of claim 3 wherein the recruiting message is received from a recruitment server that had received a message from the content source generated upon the determination that additional capacity for fulfilling the requests was needed.

6. The invention of claim 1 wherein the contents of said data items are controlled by a content provider and use of the server is provided to the content provider by a pseudo proxy service provider that bills the content provider for that use.

7. The invention of claim 1 wherein the content source is a network of one or more web servers and wherein at least ones of the data items are web pages.

9. The invention of claim 4 wherein the recruiting message is received from a recruitment server that had received a message from the content source generated upon the determination that additional capacity for fulfilling the requests was needed.

8. A server for fulfilling requests for data items that would otherwise be fulfilled by a content source connected to the Internet that stores the data items, the fulfilling being responsive to a determination that additional capacity for fulfilling the requests is needed, the server being adapted to:

receive the requests via the Internet,

make a determination as to whether it possesses each data item requested of it, and if the determination is that the server does not possess a requested data item, to obtain the requested data item from the content source in response to the server'"'"'s said determination and to fulfill the request for the requested data item upon obtaining the requested data item from the content source.

10. A method for fulfilling data requests at a pseudo proxy server, comprising:

1) the pseudo proxy server receiving information indicative of the fact that said pseudo proxy server should provide overflow support for a particular content server by responding to requests for data items that are stored at the content server, and

2) the pseudo proxy server thereafter responding to a request received at the pseudo proxy server via the Internet for a data item stored at the content server, by

a) making a determination as to whether the pseudo proxy server possesses the data item, and

b) if not, then in response to its determination that it does not possess the data item, the pseudo proxy server requesting the data item from the content server and the pseudo proxy server furnishing the data item in a response when it is received from the content server,

wherein the pseudo proxy server and the content server are connected to the Internet,

and wherein the requests originate from client terminals that are connected to the Internet via other than the pseudo proxy server and via other than the content server.

11. The method of claim 10 wherein the determination includes making a determination as to whether the pseudo proxy server has a copy of the requested data item stored locally.

12. The method of claim 10 wherein the determination includes making a determination as to whether the pseudo proxy server has a copy of the requested data item stored locally and whether an age of the copy is less than a predetermined age limit for data items.

13. The method of claim 10 further comprising, if the pseudo proxy server possesses the data item but the data item is not valid, requesting the data item from the content server before furnishing the data item.

14. The method of claim 10 further comprising storing the data item when it is received from the content server.

15. The method of claim 14 further comprising, thereafter, when subsequent requests for the data item are received, furnishing a copy of the stored data item in response to the data request.

16. The method of claim 10 wherein said information was received by said pseudo proxy server from a recruitment server that had previously stored an address of said pseudo proxy server and that had received a recruitment message from the content server that had caused the recruitment server to identify a server that could serve as a pseudo proxy server for said content server.

17. The method of claim 10 wherein prior to said pseudo proxy server having received said information, none of the content of said content server was stored at said pseudo proxy server.

18. The method of claim 10 further comprising:

3) the pseudo proxy server receiving second information indicative of the fact that said pseudo proxy server should provide overflow support for a particular second content server by responding to requests for data items that are stored at the second content server, and

4) the pseudo proxy server thereafter responding to a request received at the pseudo proxy server for a second data item stored at the second content server, by

a) making a determination as to whether the pseudo proxy server possesses the second data item, and

b) if not, then in response to its determination that it does not possess the second data item, pseudo proxy server requesting the second data item from the second content server and the pseudo proxy server furnishing the second data item in a response when it is received from the second content server.

19. The method of claim 18 wherein said information and said second information were received by said pseudo proxy server from a recruitment server that had previously stored an address of said pseudo proxy server and that had received recruitment messages from the content server and the second content server, those recruitment messages having caused the recruitment server to identify a server that could serve as a pseudo proxy server for said content server and said second content server.

20. The method of claim 19 wherein prior to said pseudo proxy server having received said information, none of the content of said content server was stored in said pseudo proxy server and wherein prior to said pseudo proxy server having received said second information, none of the content of said second content server was stored in said pseudo proxy server.