Method and system for purging content from a content delivery network

• US 7,111,057 B1
• Filed: 10/31/2000
• Issued: 09/19/2006
• Est. Priority Date: 10/31/2000
• Status: Expired due to Term

• Current Assignee: Akamai Technologies, Inc.
• Original Assignee: Akamai Technologies, Inc.
• Inventors: Dailey, Don A., Sherman, Alexander, Lisiecki, Philip A., Weihl, William E., Wein, Joel M., Dilley, John
• Primary Examiner(s): Cardone, Jason
• Assistant Examiner(s): Pollack, Melvin H.
• Application Number:
  US09/702,521
• Time in Patent Office: 2,149 Days
• Field of Search: 709203-204, 709217-219, 709223-226, 709231-234, 709/241, 713/201, 718/101, 718/102, 718/105, 707/10, 707/200, 707/201
• US Class Current: 709/223
• CPC Class Codes: G06F 16/958 Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking
• CPC Class Codes: H04L 63/14 for detecting or protecting against malicious traffic
• CPC Class Codes: Y10S 707/99952 Coherency, e.g. same view to multiple users

Abstract

A content file purge mechanism for a content delivery network (CDN) is described. A Web-enabled portal is used by CDN customers to enter purge requests securely. A purge request identifies one or more content files to be purged. The purge request is pushed over a secure link from the portal to a purge server, which validates purge requests from multiple CDN customers and batches the requests into an aggregate purge request. The aggregate purge request is pushed from the purge server to a set of staging servers. Periodically, CDN content servers poll the staging servers to determine whether an aggregate purge request exists. If so, the CDN content servers obtain the aggregate purge request and process the request to remove the identified content files from their local storage.

Claims

1. A method for identifying and removing given content files, comprising:

identifying content files to be removed from a set, or a given subset, of content servers in a content delivery network, wherein the content delivery network is operated by a service provider on behalf of participating content providers who use the content servers to cache and serve content files, and wherein the content servers in the content delivery network share content files with each other;

pushing an aggregate purge request from a central server to each of a set of staging servers, each aggregate purge request including an identifier for each content file to be removed from the set, or the given subset, of content servers;

periodically, having each of the set, or the given subset, of content servers obtain the aggregate purge request from a given staging server, wherein the content servers obtain the aggregate purge request independently and at different times; and

at each content server that obtains the aggregate purge request, purging from the content server each content file identified in the aggregate purge request;

wherein after a first content server has executed the aggregate purge request and, as a result, has purged a given content file, inhibiting the first content server from receiving the given content file from a second content server with which the first content server shares content files if the second content server has received but not then executed the aggregate purge request.

2. The method as described in claim 1 wherein the aggregate purge request is pushed to the each of the set of staging servers over a secure link.

3. The method as describe in claim 1 wherein the aggregate purge request is pulled from the given staging server to each of the set of content servers over a secure link.

4. The method as described in claim 1 further including the step of issuing a notification that each content file identified in the aggregate purge request has been purged from the content delivery network.

5. The method as described in claim 1 further including the step of issuing a notification that each content file identified in the aggregate purge request has been accepted for purging.

6. The method as described in claim 1 wherein the step of identifying the content files to be removed from the content servers includes the step of verifying that a user requesting removal is authorized to purge the content files.

7. The method as described in claim 6 wherein the user is a content delivery network customer.

8. The method as described in claim 6 wherein the user is a content delivery network administrator.

9. In a content delivery network operated by a service provider on behalf of participating content providers, wherein the participating content providers use content servers in the content delivery network to cache and serve content files, and wherein content servers in the content delivery network share content files with each other, the improvement comprising:

a purge mechanism for selectively identifying and removing given content files from the set, or a given subset, of content servers in the content delivery network, comprising;

a Web-based interface for identifying content files to be purged from the content servers;

a purge server for receiving purge requests pushed from the Web-based interface, validating each purge request, and batching a set of purge requests into an aggregate purge request;

a set of staging servers for receiving the aggregate purge request pushed from the purge server; and

code executing on a given content server for periodically polling a given staging server, for pulling the aggregate purge request, for removing the identified content files from the given content server, and, with respect to a given content file that has been removed from the given content server, for inhibiting the given content server from receiving the given content file from at least one other content server with which the given content server shares content files if the other content server has not then removed the given content file that has been removed by the given content server.