Highly scalable and highly available cluster system management scheme

• US 6,427,163 B1
• Filed: 07/10/1998
• Issued: 07/30/2002
• Est. Priority Date: 07/10/1998
• Status: Expired due to Term

• Current Assignee: BlueCat Networks Incorporated
• Original Assignee: International Business Machines Corporation
• Inventors: Arendt, James W., Chao, Ching-Yun, Mancisidor, Rodolfo Ausgusto
• Primary Examiner(s): Follansbee, John A.
• Application Number:
  US09/114,051
• Time in Patent Office: 1,481 Days
• Field of Search: 712/13, 709/201, 709/203, 709/220, 709/226, 707/10, 707/103.R, 707/201, 707/202, 714/11, 714/13
• US Class Current: 709/201
• CPC Class Codes: G06F 11/1425 by reconfiguration of node membership
• CPC Class Codes: G06F 9/5061 Partitioning or combining of resources

Abstract

A cluster system is treated as a set of resource groups, each resource group including an highly available application and the resources upon which it depends. A resource group may have between 2 and M data processing systems, where M is small relative to the cluster size N of the total cluster. Configuration and status information for the resource group is fully replicated only on those data processing systems which are members of the resource group. A configuration object/database record for the resource group has an associated owner list identifying the data processing systems which are members of the resource group and which may therefore manage the application. A data processing system may belong to more than one resource group, however, and configuration and status information for the data processing system is replicated to each data processing system which could be affected by failure of the subject data processing system.

Claims

1. A cluster multiprocessing system, comprising:

a plurality of data processing systems segregated into a plurality of resource groups each including an application and at least two data processing systems;

a plurality of configuration objects each corresponding to a resource group within the plurality of resource groups, each configuration object containing;

configuration and status information for the corresponding resource group; and

an associated owners list identifying data processing systems within the corresponding resource group; and

a configuration database on each data processing system within the cluster multiprocessing system, each configuration database containing at least one configuration object, wherein a configuration object for a resource group is replicated on each data processing system identified in the owners list associated with the configuration object, wherein a configuration database on a data processing system included within X resource groups, where X is greater than one, contains X configuration objects.

2. The cluster multiprocessing system of claim 1, wherein the cluster multiprocessing system comprises N data processing systems and a resource group within the plurality of resource groups contains M data processing systems, where M is smaller than N.

3. The cluster multiprocessing system of claim 2, wherein M equals three and N is at least 1,000.

4. The cluster multiprocessing system of claim 1, wherein each configuration database on a data processing system contains a configuration object for each resource group including the data processing system.

5. The cluster multiprocessing system of claim 1, wherein the owners list associated with a configuration object identifies data processing systems which may alter the configuration object.

6. The cluster multiprocessing system of claim 1, wherein a configuration object may only be altered by a data processing system identified within the owners list associated with the configuration object.

7. A method of managing cluster configuration information, comprising:

dividing a cluster into a plurality of resource groups each including an application and at least two data processing systems;

instantiating a plurality of configuration objects corresponding to the plurality of resource groups, each configuration object containing;

configuration and status information for a corresponding resource group; and

an associated owners list identifying data processing systems within the corresponding resource group; and

maintaining a configuration database on each data processing system within the cluster multiprocessing system, each configuration database containing at least one configuration object, wherein the configuration database on a data processing system contains each configuration object for a resource group which identifies the data processing system as an owner in the owners list associated with the configuration object, wherein a configuration database on a data processing system included within X resource groups, where X is greater than one, contains X configuration objects.

8. The method of claim 7, further comprising:

replicating a configuration object on each data processing system identified within the owners list associated with the configuration object.

9. The method of claim 7, wherein the step of maintaining a configuration database on each data processing system within the cluster multiprocessing system further comprises:

maintaining, within the configuration database on a data processing system, a copy of a configuration object for each resource group including the data processing system.

10. The method of claim 7, wherein the step of instantiating a plurality of configuration objects corresponding to the plurality of resource groups further comprises:

listing, within the owners list associated with a configuration object, data processing systems permitted to alter the configuration object.

11. The method of claim 7, wherein the step of instantiating a plurality of configuration objects corresponding to the plurality of resource groups further comprises:

instantiating one configuration object for a resource group on each data processing system within the resource group.

12. A computer-readable medium having stored thereon computer executable instructions for implementing a method for managing cluster configuration information, said computer executable instructions when executed perform the steps of:

dividing a cluster into a plurality of resource groups each including an application and at least two data processing systems;

instantiating a plurality of configuration objects corresponding to the plurality of resource groups, each configuration object containing;

configuration and status information for a corresponding resource group; and

an associated owners list identifying data processing systems within the corresponding resource group; and

maintaining a configuration database on each data processing system within the cluster multiprocessing system, each configuration database containing at least one configuration object, wherein the configuration database on a data processing system contains each configuration object for a resource group which identifies the data processing system as an owner in the owners list associated with the configuration object, wherein a configuration database on a data processing system included within X resource groups, where X is greater than one, contains X configuration objects.

13. The computer-readable medium of claim 12, further comprising:

replicating a configuration object on each data processing system identified within the owners list associated with the configuration object.

14. The computer-readable medium of claim 12, wherein the step of maintaining a configuration database on each data processing system within the cluster multiprocessing system further comprises:

maintaining, within the configuration database on a data processing system, a copy of a configuration object for each resource group including the data processing system.

15. The computer-readable medium of claim 12, wherein the step of instantiating a plurality of configuration objects corresponding to the plurality of resource groups further comprises:

listing, within the owners list associated with a configuration object, data processing systems permitted to alter the configuration object.

16. The computer-readable medium of claim 12, wherein the step of instantiating a plurality of configuration objects corresponding to the plurality of resource groups further comprises:

instantiating one configuration object for a resource group on each data processing system within the resource group.