Notification of configuration updates in a cluster system

• US 8,788,465 B2
• Filed: 12/01/2010
• Issued: 07/22/2014
• Est. Priority Date: 12/01/2010
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Fried, Eric P., Mishra, Rajeev, Russell, Lance W., Tovcimak, Stephen J., Vaddagiri, Murali, Fontenot, Shevaun M.
• Primary Examiner(s): Singh, Amresh
• Application Number:
  US12/957,853
• Publication Number:
  US 20120143829A1
• Time in Patent Office: 1,329 Days
• Field of Search: 707/687
• US Class Current: 707/687
• CPC Class Codes: G06F 11/1425 by reconfiguration of node membership
• CPC Class Codes: G06F 11/1482 by means of middleware or OS functionality
• CPC Class Codes: G06F 11/202 where processing functionality is redundant redundant communication control functionality G06F11/2005, redundant storage control functionality G06F11/2089
• CPC Class Codes: G06F 11/2046 where the redundant components share persistent storage G06F11/2043 takes precedence

Abstract

A second node receives a message from a first node in a cluster environment. The message includes a unique identifier of a shared data storage device including a cluster configuration database that defines membership of nodes in a cluster. In response to receiving the message, the second node attempts to find the shared data storage device. In response to finding the shared data storage device, the second node locates and reads the cluster configuration database on the shared data storage device. The second node then assimilates a cluster configuration update indicated by the cluster configuration database.

Claims

1. A method of data processing in a cluster system, comprising:

a second node receiving a message from a first node in a cluster environment, the message including a unique identifier of a shared data storage device including a cluster configuration database that defines membership of nodes in a cluster;

in response to receiving the message;

the second node attempting to find the shared data storage device;

in response to finding the shared data storage device, the second node locating and reading the cluster configuration database on the shared data storage device; and

the second node assimilating a cluster configuration update indicated by the cluster configuration database.

2. The method of claim 1, and further comprising:

in response to the second node failing to locate the shared data storage device, the second node ignoring the message.

3. The method of claim 1, wherein the reading includes validating the cluster configuration database.

4. The method of claim 1, wherein the locating comprises reading a boot record and determining a storage location of the cluster configuration database from the boot record.

5. The method of claim 1, wherein the assimilating comprises the second node joining the cluster and the second node starting cluster services.

6. The method of claim 1, wherein the message does not specify cluster configuration data.

7. A program product comprising:

a computer-readable storage device; and

program code stored within the computer-readable storage device that, when executed by a processing node, causes the processing node to perform;

receiving a message from another node in a cluster environment, the message including a unique identifier of a shared data storage device including a cluster configuration database that defines membership of nodes in a cluster;

in response to receiving the message;

attempting to find the shared data storage device;

in response to finding the shared data storage device, locating and reading the cluster configuration database on the shared data storage device; and

assimilating a cluster configuration update indicated by the cluster configuration database.

8. The program product of claim 7, wherein the program code further causes the processing node to perform:

in response to the second node failing to locate the shared data storage device, ignoring the message.

9. The program product of claim 7, wherein the reading includes validating the cluster configuration database.

10. The program product of claim 7, wherein the locating comprises reading a boot record and determining a storage location of the cluster configuration database from the boot record.

11. The program product of claim 7, wherein the assimilating comprises the processing node joining the cluster and the processing node starting cluster services.

12. The program product of claim 7, wherein the message does not specify cluster configuration data.

13. A processing node comprising:

a processor;

data storage coupled to the processor; and

program code within the data storage that, when executed by the processor, causes the processing node to perform;

receiving a message from another node in a cluster environment, the message including a unique identifier of a shared data storage device including a cluster configuration database that defines membership of nodes in a cluster;

in response to receiving the message;

attempting to find the shared data storage device;

in response to finding the shared data storage device, locating and reading the cluster configuration database on the shared data storage device; and

assimilating a cluster configuration update indicated by the cluster configuration database.

14. The data processing system of claim 13, wherein the program code further causes the processing node to perform:

in response to the second node failing to locate the shared data storage device, ignoring the message.

15. The data processing system of claim 13, wherein the reading includes validating the cluster configuration database.

16. The data processing system of claim 13, wherein the locating comprises reading a boot record and determining a storage location of the cluster configuration database from the boot record.

17. The data processing system of claim 13, wherein the assimilating comprises the processing node joining the cluster and the processing node starting cluster services.

18. The data processing system of claim 13, wherein the message does not specify cluster configuration data.