Network proxy capable of dynamically selecting a destination device for servicing a client request

• US 6,345,303 B1
• Filed: 10/06/1997
• Issued: 02/05/2002
• Est. Priority Date: 03/25/1997
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Tso, Michael Man-Hak, Knauerhase, Robert Conrad
• Primary Examiner(s): Maung, Zarni
• Assistant Examiner(s): Barot, Bharat
• Application Number:
  US08/943,215
• Time in Patent Office: 1,583 Days
• Field of Search: 709/200-203, 709/206, 709/217-219, 709/225, 709/228-229, 709/235-239, 709/242, 709/245, 713/200-201, 707/10, 707/100-104
• US Class Current: 709/238
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/101 based on network conditions
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing

Abstract

A dynamically-chainable network proxy is implemented in a method for chaining a network proxy to a destination device, wherein the network proxy is coupled to a source device and a plurality of destination devices, including the step of receiving a request from the source device at the network proxy. The network proxy then selects one of the plurality of destination devices to serve the request, with the selection made according to a predetermined selection criterion. The network proxy reformats the request to designate the selected destination device, and then forwards the reformatted request to the selected destination device.

Claims

1. A method for dynamically chaining a network proxy to a destination device, wherein the network proxy is coupled to a source device and a plurality of destination devices, said method comprising the steps of:

receiving a data request from the source device at a network proxy;

selecting one of the plurality of destination devices to service the data request, said selection being made by the network proxy according to a predetermined selection criterion;

selectively reformatting the data request for said selected destination device;

forwarding said selectively reformatted data request from said network proxy to said selected destination device;

receiving a response to said selectively reformatted data request at said network proxy, wherein said response comprises data requested by the source device; and

forwarding said response to said source device.

2. The method of claim 1, wherein said forwarding step further comprises forwarding said selectively reformatted data request to a second network proxy.

3. The method of claim 2, wherein said forwarding step further comprises forwarding said selectively reformatted data request to a second network proxy that is dynamically chainable.

4. The method of claim 1, wherein said reformatting step further comprises selectively reformatting said data request as an HTTP-compliant data request.

5. The method of claim 1, wherein said receiving a response to said selectively reformatted data request comprises receiving said response from said selected destination device.

6. The method of claim 1, wherein said receiving a response to said selectively reformatted data request comprises receiving said response from a device other than said selected destination device.

7. A network proxy coupled between a source device and a plurality of destination devices, said network proxy comprising a destination selection module for dynamically chaining said network proxy to a selected one of said plurality of destination devices, said destination selection module comprising a set of executable instructions for receiving a data request from the source device, selecting one of the plurality of destination devices to receive said data request based on a predetermined selection criterion, reformatting said data request for transmission to said selected destination device, receiving a response to said data request, said response comprising data requested bv the source device, and forwarding said response to the source device.

8. The network proxy of claim 7, wherein said predetermined selection criterion comprises a characteristic of said data request.

9. The network proxy of claim 7, wherein said predetermined selection criterion comprises a command embedded within said data request.

10. The network proxy of claim 7, wherein said predetermined selection criterion comprises a characteristic of said network proxy.

11. The network proxy of claim 7, wherein said predetermined selection criterion comprises a characteristic of said plurality of destination devices.

12. The network proxy of claim 7, wherein said network proxy is coupled to said plurality of destination devices by a respective plurality of communications links, said predetermined selection criterion comprising a characteristic of said plurality of communications links.

13. A set of instructions residing on a storage medium for execution by a network proxy, wherein the network proxy is coupled to a source device and a plurality of destination devices, said set of instructions comprising instructions for:

receiving at the network proxy a data request from the source device;

selecting one of the plurality of destination devices to service the data request, said selection being made by the network proxy according to a predetermined selection criterion;

reformatting the data request for said selected destination device;

forwarding said reformatted data request from the network proxy to said selected destination device;

receiving at the network proxy a response to said selectively reformatted data request, said response comprising data requested by the source device; and

forwarding said response to said source device.