Method to improve response time when clients use network services

• US 20060277303A1
• Filed: 06/06/2005
• Published: 12/07/2006
• Est. Priority Date: 06/06/2005
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Vallabhaneni, Vasu, Jain, Vinit, Hegde, Nikhil, Narasimhan, Rashmi
• Application Number:
  US11/146,472
• Publication Number:
  US 20060277303A1
• Time in Patent Office: Days
• US Class Current: 709/226
• CPC Class Codes: H04L 43/0864 Round trip delays
• 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 67/1012 based on compliance of requirements or conditions with available server resources
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

A method, apparatus, and computer program product in a data processing system for improving response time when clients use network services. If a load level exceeds a load transfer level, the method causes the server to refuse a corresponding percentage of incoming requests received. Then the method sends a message to the requesting client for each refused incoming request, wherein the message requests the requesting client to resend the refused incoming request to a secondary server.

Claims

1. A method in a data processing system for improving response time when clients use network services, the method comprising:

determining if a load level exceeds a load transfer level in a set of load transfer levels;

responsive to determining that the load level exceeds the load transfer level in the set of load transfer levels, refusing a corresponding percentage of a plurality of incoming requests received; and

responsive to refusing the corresponding percentage of the plurality of incoming requests received, sending a message to a requesting client for each incoming request that is refused, wherein the message requests the requesting client to resend the refused incoming request to a secondary server.

2. The method of claim 1, wherein the load level is based upon an incoming requests buffer size.

3. The method of claim 1, wherein the load level is based upon a set of round trip times including a round trip time for each incoming request.

4. The method of claim 1, wherein the load level is based upon an amount of data in a send buffer.

5. The method of claim 1, wherein the message sent to the requesting client using a user datagram protocol connection is “

ICMP unreachable”

.

6. The method of claim 1, wherein the message sent to the requesting client using a transmission control protocol connection is “

RESET”

.

7. The method of claim 1, wherein the message sent to the requesting client requests that the requesting client resend the refused incoming request at a later time.

8. A data processing system for improving response time when clients use network services, the data processing system comprising:

determining means for determining if a load level exceeds a load transfer level in a set of load transfer levels;

responsive to determining that the load level exceeds the load transfer level in the set of load transfer levels, refusing means for refusing a corresponding percentage of a plurality of incoming requests received; and

responsive to refusing the corresponding percentage of the plurality of incoming requests received, sending means for sending a message to a requesting client for each incoming request that is refused, wherein the message requests the requesting client to resend the refused incoming request to a secondary server.

9. The data processing system of claim 8, wherein the load level is based upon an incoming requests buffer size.

10. The data processing system of claim 8, wherein the load level is based upon a set of round trip times including a round trip time for each incoming request.

11. The data processing system of claim 8, wherein the load level is based upon an amount of data in a send buffer.

12. The data processing system of claim 8, wherein the message sent to a requesting client using a user datagram protocol connection is “

ICMP unreachable”

.

13. The data processing system of claim 8, wherein the message sent to the requesting client using a transmission control protocol connection is “

RESET”

.

14. The data processing system of claim 8, wherein the message sent to the requesting client requests that the requesting client resend the refused incoming request at a later time.

15. A computer program product on a computer-readable medium for use in a data processing system for improving response time when clients use network services, the computer program product comprising:

first instructions for determining if a load level exceeds a load transfer level in a set of load transfer levels;

responsive to determining that the load level exceeds the load transfer level in the set of load transfer levels, second instructions for refusing a corresponding percentage of a plurality of incoming requests received; and

responsive to refusing the corresponding percentage of the plurality of incoming requests received, third instructions for sending a message to a requesting client for each incoming request that is refused, wherein the message requests the requesting client to resend the refused incoming request to a secondary server.

16. The computer program product of claim 15, wherein the load level is based upon an incoming requests buffer size.

17. The computer program product of claim 15, wherein the load level is based upon a set of round trip times including a round trip time for each incoming request.

18. The computer program product of claim 15, wherein the load level is based upon an amount of data in a send buffer.

19. The computer program product of claim 15, wherein the message sent to the requesting client using a user datagram protocol connection is “

ICMP unreachable”

.

20. The computer program product of claim 15, wherein the message sent to the requesting client using a transmission control protocol connection is “

RESET”

.