METHOD AND APPARATUS FOR BUFFERING AND OBTAINING RESOURCES, RESOURCE BUFFERING SYSTEM

• US 20120203910A1
• Filed: 04/13/2012
• Published: 08/09/2012
• Est. Priority Date: 10/13/2009
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Chengdu Huawei Symantec Technologies Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: LAN, Gang, WANG, Rui, GONG, Chen, ZHOU, Shuguo
• Granted Patent: US 9,503,518 B2
• Time in Patent Office: Days
• US Class Current: 709/226
• 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 67/1023 based on a hash applied to IP addresses or costs
• CPC Class Codes: H04L 67/1029 using data related to the state of servers by a load balancer
• CPC Class Codes: H04L 67/5682 Policies or rules for updating, deleting or replacing the stored data

Abstract

A method and an apparatus for buffering and obtaining resources as well as a resource buffering system are disclosed. The method includes: obtaining an access popularity value of a resource from a database at intervals of a first preset time, and obtaining load values of cache servers from the database if determining that the access popularity value reaches a preset first threshold; and determining a duplication cache server for duplicating the resource according to the access popularity value and the load values, and notifying the duplication cache server to duplicate the resource from a cache server that stores the resource and buffer the resource. The method overcome the problems in the prior, namely, the same resource is buffered in only one cache server and the relatively idle cache servers are unable to share loads with busy cache servers. The method improves extensibility and working efficiency of the buffering system.

Claims

1. A resource buffering method, comprising:

obtaining an access popularity value of a resource from a database at intervals of a first preset time, and obtaining load values of cache servers from the database if determining that the access popularity value reaches a preset first threshold; and

determining a duplication cache server for duplicating the resource according to the access popularity value and the load values, and notifying the duplication cache server to duplicate the resource from a cache server that stores the resource and buffer the resource.

2. The method according to claim 1, wherein:

the determining of the duplication cache server according to the access popularity value and the load values comprises;

determining a level of the number of downloads of the resource in a unit time according to the access popularity value;

sorting all cache servers except the cache server that already buffers resource in order of the load value, and obtaining a sorting result; and

determining the required number of duplication cache servers according to the level of the number of downloads, and selecting cache servers as duplication cache servers in the sorting result according to the required number of duplication cache servers, wherein the selected cache servers are those whose load values are lower than a preset second threshold.

3. The method according to claim 1, further comprising:

obtaining a duplication completion notification sent by the duplication cache server, writing the duplication completion notification and duplication information into the database, wherein the duplication information is information about the duplication cache servers that buffer the resource.

4. The method according to claim 3, further comprising:

when the access popularity value of the resource stored in the duplication cache server is lower than the first threshold, determining at least one cache server among the cache servers that already buffer the resource, and notifying the determined cache server to delete the resource; and

receiving a deletion completion message sent by the cache server, writing the deletion completion message into the database, and updating the duplication information of the resource in the database.

5. The method according to the claim 1, further comprising:

receiving a resource query request, and querying a database to check whether a requested resource is buffered;

receiving information about all cache servers that buffer the resource and load values of all cache servers that buffer the resource, wherein the information and the load values are sent by the database;

selecting a target download cache server according to the information about all cache servers that buffer the resource and the load values of all cache servers that buffer the resource; and

notifying a user to download the resource from the target download cache server.

6. The method according to claim 5, wherein:

the step of selecting a target download cache server according to the information about all cache servers that buffer the resource and the load values of all cache servers that buffer the resource comprises;

selecting a cache server with a lowest load value among all cache servers that buffer the resource as the target download cache server.

7. A resource buffering apparatus, comprising:

an obtaining module, configured to obtain an access popularity value of a resource from a database at intervals of a first preset time, and obtain load values of cache servers from the database if determining that the access popularity value reaches a preset first threshold;

a first determining module, configured to determine a duplication cache server for duplicating the resource according to the access popularity value and the load values; and

a first notifying module, configured to notify the duplication cache server to duplicate the resource from a cache server that stores the resource and buffer the resource.

8. The apparatus according to claim 7, wherein the first determining module comprises:

a determining submodule, configured to determine a level of the number of downloads of the resource in a unit time according to the access popularity value;

a sorting module, configured to sort all cache servers except the cache server that already buffers resource in order of the load value, and obtain a sorting result; and

a selecting module, configured to;

determine the required number of duplication cache servers according to the level of the number of downloads, and select cache servers as duplication cache servers in the sorting result according to the required number of duplication cache servers, wherein the selected cache servers are those whose load values are lower than a preset second threshold.

9. The apparatus according to claim 7, wherein the resource buffering apparatus further comprises:

a second determining module, configured to determine at least one cache server among the cache servers that already buffer the resource when the access popularity value of the resource stored in the duplication cache server is lower than the first threshold;

a second notifying module, configured to notify the determined cache server to delete the resource;

a first receiving module, configured to receive a deletion completion message sent by the determined cache server; and

an updating module, configured to write the deletion completion message into the database, and update duplication information of the resource in the database.

10. A resource obtaining apparatus, comprising:

a second receiving module, configured to receive a resource query request;

a third determining module, configured to query a database to check whether a requested resource is buffered according to the resource query request;

a third receiving module, configured to receive information about all cache servers that buffer the resource and load values of all cache servers that buffer the resource, wherein the information and the load values are sent by the database;

a fourth determining module, configured to select a target download cache server according to the information about all cache servers that buffer the resource and the load values of all cache servers that buffer the resource; and

a third notifying module, configured to notify a user to download the resource from the target download cache server.