Ensuring a given transactional unit of work arrives at an appropriate server instance

• US 20060167999A1
• Filed: 02/14/2006
• Published: 07/27/2006
• Est. Priority Date: 06/14/1999
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Little, Rodney A., Clark, Carl E., Puchkoff, Gary S., Frey, Jeffrey A., Fulkerson, Carroll E. Jr.
• Application Number:
  US11/353,894
• Publication Number:
  US 20060167999A1
• Time in Patent Office: Days
• US Class Current: 709/204
• CPC Class Codes: G06F 2209/5016 Session
• CPC Class Codes: G06F 9/5033 considering data affinity
• CPC Class Codes: H04L 67/288 Distributed intermediate devices, i.e. intermediate devices for interaction with other intermediate devices on the same level
• CPC Class Codes: H04L 67/563 Data redirection of data network streams
• CPC Class Codes: H04L 67/5682 Policies or rules for updating, deleting or replacing the stored data

Abstract

Ensuring that a given transactional unit of work arrives at an appropriate server instance. A server instance receives a request that is associated with a unit of work. The server instance that received the request determines whether it is responsible for the unit of work associated with that request. When the server instance is responsible for the unit of work, the server instance processes the request. When the server instance is not responsible for the unit of work, it attempts to register its interest in the unit of work. If this attempt is successful, then the server instance can process the request. If the attempt is unsuccessful, then the responsible server instance is located and the request is forwarded to the responsible server instance.

Claims

1. A method of managing requests within a computing environment, said computing environment comprising a plurality of server instances, and said method comprising:

receiving, within said computing environment, a plurality of requests that are associated with a unit of work within a thread; and

ensuring that said plurality of requests are processed by one server instance of said plurality of server instances, wherein a temporary affinity to said one server instance is provided for requests under said unit of work, and wherein said one server instance comprises a software process.

2. The method of claim 1, wherein at least a portion of said plurality of server instances are replicas of one another.

3. The method of claim 1, wherein said ensuring comprises using a registration protocol to register interest of said one server instance in said unit of work and a location forwarding protocol to forward any requests under said unit of work received by other server instances to said one server instance.

4. The method of claim 1, wherein said temporary affinity continues to be provided, without aborting said unit of work, even if a connection to said one server instance is reestablished after being broken.

5. A system of managing requests within a computing environment, said computing environment comprising a plurality of server instances, and said system comprising:

means for receiving, within said computing environment, a plurality of requests that are associated with a unit of work within a thread; and

means for ensuring that said plurality of requests are processed by one server instance of said plurality of server instances, wherein a temporary affinity to said one server instance is provided for requests under said unit of work, and wherein said one server instance comprises a software process.

6. The system of claim 5, wherein at least a portion of said plurality of server instances are replicas of one another.

7. The system of claim 5, wherein said means for ensuring comprises using a registration protocol to register interest of said one server instance in said unit of work and a location forwarding protocol to forward any requests under said unit of work received by other server instances to said one server instance.

8. The system of claim 5, wherein said temporary affinity continues to be provided, without aborting said unit of work, even if a connection to said one server instance is reestablished after being broken.

9. At least one program storage device readable by a machine, tangibly embodying at least one program of instructions executable by the machine to perform a method of managing requests within a computing environment, said computing environment comprising a plurality of server instances, and said method comprising:

receiving, within said computing environment, a plurality of requests that are associated with a unit of work within a thread; and

ensuring that said plurality of requests are processed by one server instance of said plurality of server instances, wherein a temporary affinity to said one server instance is provided for requests under said unit of work, and wherein said one server instance comprises a software process.

10. The at least one program storage device of claim 9, wherein at least a portion of said plurality of server instances are replicas of one another.

11. The at least one program storage device of claim 9, wherein said ensuring comprises using a registration protocol to register interest of said one server instance in said unit of work and a location forwarding protocol to forward any requests under said unit of work received by other server instances to said one server instance.

12. The at least one program storage device of claim 9, wherein said temporary affinity continues to be provided, without aborting said unit of work, even if a connection to said one server instance is reestablished after being broken.