SYSTEM AND METHOD FOR PROVIDING A COMPUTER STANDBY NODE

• US 20110141882A1
• Filed: 12/15/2009
• Published: 06/16/2011
• Est. Priority Date: 12/15/2009
• Status: Active Grant

• Current Assignee: Unisys Corporation
• Original Assignee: Unisys Corporation
• Inventors: Stafford, Edward, Bechtold, Thomas J., Rieschl, Michael John, McBreen, James R.
• Granted Patent: US 8,495,413 B2
• Time in Patent Office: Days
• US Class Current: 370/221
• CPC Class Codes: G06F 11/2025 using centralised failover control functionality
• CPC Class Codes: G06F 11/2033 switching over of hardware resources
• CPC Class Codes: G06F 11/2038 with a single idle spare processing component
• CPC Class Codes: G06F 11/2046 where the redundant components share persistent storage G06F11/2043 takes precedence

Abstract

An apparatus for providing a computing environment in a computing system includes a first node, a second node, an operations server, and a communication link. The first node is capable of supporting a production computing environment and has a first disk storage. The second node is capable of supporting a second operational computing environment, independent of the production computing environment and has a second disk storage. The operations server manages the first and second node and can switch the production computing environment from the first node to the second node. The communications link allows communication between the first node, the second node, and the operations server. The second node can take over the production computing environment from the first node upon a failure of the first node by providing the second node with access to the first disk storage and rebooting the second node from the first disk storage. A method of switching a production computing environment from a first node, having a first disk storage, to a second node in the event of a failure on the first node includes determining if the first node had a failure and if the first node had a failure: reassigning ownership of the partition definition to the second node; restoring communications configuration on the second node; and booting the second node from the first disk storage.

Claims

1. An apparatus for providing a computing environment in a computing system, the apparatus comprising:

a first node capable of supporting a production computing environment and having first disk storage;

a second node capable of supporting a second operational computing environment, independent of the production computing environment, and having second disk storage;

an operations server that manages the first and second node and that can switch the production computing environment from the first node to the second node; and

a communications link between the first node, the second node, and the operations server;

wherein the operations server can cause the second node to take over the production computing environment from the first node upon a failure of the first node by providing the second node with access to the first disk storage and rebooting the second node from the first disk storage.

2. An apparatus according to claim 1, wherein the first node has third disk storage not accessible by the second node.

3. An apparatus according to claim 1, wherein the second node has fourth disk storage not accessible by the first node.

4. An apparatus according to claim 1, wherein the communications link includes a production local area network and a system control local area network.

5. An apparatus according to claim 1, wherein the operations server is located in a rack separate from the first node and the second node.

6. An apparatus according to claim 1, wherein the operations server can cause the first node to reboot from the second disk storage.

7. A method of switching a production computing environment from a first node, having a first disk storage, to a second node in the event of a failure on the first node, the method comprising:

determining if the first node had a failure and if the first node had a failure;

reassigning ownership of the partition definition to the second node;

restoring communications configuration on the second node; and

booting the second node from the first disk storage.

8. A method according to claim 7, further comprising before determining if the first node had a failure, determining if the first node has stopped.

9. A method according to claim 8, further comprising if the first node has not stopped, stopping the first node.

10. A method according to claim 7, wherein determining includes determining if the first node had a catastrophic failure.

11. A method according to claim 10, further comprising if the first node did not have a catastrophic failure, halting a partition on the first node.

12. A method according to claim 11, further comprising deactivating the partition on the first node.

13. An apparatus for providing a computing environment in a computing system, the apparatus comprising:

a first node capable of supporting a production computing environment and having a first disk storage controlled by a first operating system and a SAIL kernel disk controlled by a first SAIL kernel, wherein the first operating system cannot access the first SAIL kernel disk and the first SAIL kernel cannot access the first disk storage;

a second node capable of supporting a second operational computing environment, independent of the production computing environment, and having second disk storage controlled by a second operating system and a SAIL kernel disk controlled by a second SAIL kernel, wherein the second operating system cannot access the second SAIL kernel disk and the second SAIL kernel cannot access the second disk storage, and wherein the second node cannot access the first SAIL kernel disk and the first node cannot access the second SAIL kernel disk;

an operations server that manages the first and second node and that can switch the production computing environment from the first node to the second node; and

a communications link between the first node, the second node, and the operations server;

wherein the operations server can cause the second node can take over the production computing environment from the first node upon a failure of the first node by providing the second node with access to the first disk storage and rebooting the second node from the first disk storage.

14. An apparatus according to claim 13, wherein the operations server can stop the first node and the second node.

15. An apparatus according to claim 13, wherein the operations server can halt a partition on the first node and deactivate the partition.

16. An apparatus according to claim 15, wherein the operations server can reassign ownership of the partition to the second node.

17. An apparatus according to claim 16, wherein the operations server can restore a communications network configuration.

18. An apparatus according to claim 13, wherein the communications link includes a production local area network and a system control local area network.

19. An apparatus according to claim 13, wherein the first node includes a first cell.

20. An apparatus according to claim 19, wherein the second node includes a second cell.