METHOD, APPARATUS AND PROGRAM STORAGE DEVICE FOR PERFORMING FAULT TOLERANT CODE UPGRADE ON A FAULT TOLERANT SYSTEM BY DETERMINING WHEN FUNCTIONAL CODE REACHES A DESIRED STATE BEFORE RESUMING AN UPGRADE

• US 20080155322A1
• Filed: 12/20/2006
• Published: 06/26/2008
• Est. Priority Date: 12/20/2006
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Goldberg, Itzhack, Chen, Chiahong, Brundidge, Jimmie Lee, Heffley, Daniel Anson
• Granted Patent: US 7,685,461 B2
• Time in Patent Office: Days
• US Class Current: 714/21
• CPC Class Codes: G06F 11/1433 during software upgrading
• CPC Class Codes: G06F 11/2089 Redundant storage control functionality

Abstract

A method, apparatus and program storage device for performing fault tolerant code upgrade on a fault tolerant system by determining when functional code reaches a desired state before resuming an upgrade. A concurrent code-load to a plurality of storage controllers of a storage system is initiated. A role transition is detected. The storage system determines when the storage system returns to a desired state. The code-load is resumed when the storage system returns to the desired state.

Claims

1. A program product comprising a computer readable medium embodying at least one program of instructions executable by a computer to perform operations to provide fault tolerant code upgrades on a fault tolerant system, comprising:

initiating a concurrent code-load to a plurality of storage controllers of a storage system;

detecting a role transition;

determining when the storage system returns to a desired state; and

resuming the code-load when the storage system returns to the desired state.

2. The program product of claim 1, wherein the detecting a role transition further comprises detecting a failover.

3. The program product of claim 1, wherein the detecting a role transition further comprises detecting a failback.

4. The program product of claim 1, wherein the initiating a concurrent code-load to a plurality of storage controllers further comprises initiating a code-load to change the storage system to a single-cluster operational mode.

5. The program product of claim 4, wherein the detecting a role transition further comprises detecting a failover, the determining when the storage system returns to a desired state further comprising determining when the storage system returns to a single-cluster operational state.

6. The program product of claim 5 further comprising determining whether the code-load completed.

7. The program product of claim 1, wherein the initiating a concurrent code-load to a plurality of storage controllers further comprises initiating a quiesce command.

8. The program product of claim 7, wherein the determining when the storage system returns to a desired state further comprising determining when the storage system returns to a dual-cluster operational state.

9. The program product of claim 8, wherein the resuming the code-load when the storage system returns to the desired state further comprises resuming code-load by issuing a quiesce command.

10. The program product of claim 1, further comprising determining whether the code-load completed.

11. A system, comprising:

a processor; and

memory, coupled to the processor, the memory comprising a computer usable medium embodying at least one program of instructions to perform operations, the operations comprising;

initiating a concurrent code-load to a plurality of storage controllers of a storage system;

detecting a role transition;

determining when the storage system returns to a desired state; and

resuming the code-load when the storage system returns to the desired state.

12. The system of claim 11, wherein the detecting a role transition further comprises detecting a failover.

13. The system of claim 11, wherein the detecting a role transition further comprises detecting a failback.

14. The system of claim 11, wherein the initiating a concurrent code-load to a plurality of storage controllers further comprises initiating a code-load to change the storage system to a single-cluster operational mode.

15. The system of claim 14, wherein the detecting a role transition further comprises detecting a failover, the determining when the storage system returns to a desired state further comprising determining when the storage system returns to a single-cluster operational state.

16. The system of claim 15 further comprising determining whether the code-load completed.

17. The system of claim 11, wherein the initiating a concurrent code-load to a plurality of storage controllers further comprises initiating a quiesce command.

18. The system of claim 17, wherein the determining when the storage system returns to a desired state further comprising determining when the storage system returns to a dual-cluster operational state.

19. The system of claim 18, wherein the resuming the code-load when the storage system returns to the desired state further comprises resuming code-load by issuing a quiesce command.

20. A method for providing fault tolerant code upgrades on a fault tolerant system, comprising:

initiating a concurrent code-load to a plurality of storage controllers of a storage system;

detecting a role transition;

determining when the storage system returns to a desired state; and

resuming the code-load when the storage system returns to the desired state.