Method and system for implementing redundant servers

• US 20030037133A1
• Filed: 12/20/2001
• Published: 02/20/2003
• Est. Priority Date: 08/15/2001
• Status: Abandoned Application

• Current Assignee: SPX Corporation
• Original Assignee: SPX Corporation
• Inventors: Owens, Thomas
• Application Number:
  US10/022,574
• Publication Number:
  US 20030037133A1
• Time in Patent Office: Days
• US Class Current: 709/223
• CPC Class Codes: G06F 11/2028 eliminating a faulty processor or activating a spare
• CPC Class Codes: G06F 11/2038 with a single idle spare processing component
• CPC Class Codes: H04L 61/35 involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1029 using data related to the state of servers by a load balancer
• CPC Class Codes: H04L 67/1034 Reaction to server failures by a load balancer

Abstract

A method for providing a backup server to a primary server includes operating a first server such that the first server communicates with a network and is associated with a primary server address. A second server is also maintained, configured in parallel with the first server, and associated with a monitor server address. The monitor server includes periodically signaling the primary server address, watching to determine whether a response to the signal is received within a predetermined time period, and repeating the signaling and watching until a time period elapses where the response is not received within the time period. If a response is not received, the first server is rebooted and the second server assumes the role of the primary server.

Claims

1. A method for providing backup server support, comprising:

operating a first server wherein the first server is capable of communication with a network and is associated with a primary server address;

maintaining a second server wherein the second server is capable of communication with the network, configured in parallel with the first server, and is associated with a monitor server address;

signaling, using a first signal, the primary server address;

monitoring for a response to the first signal within a predetermined time period; and

repeating the signaling step and the monitoring step until a time period elapses wherein the response is not received within the time period, and thereafter performing the step of booting the first server.

2. The method of claim 1 wherein the first server includes a first server memory and the second server includes a second server memory, and comprising the additional step of, after the signaling step is repeated a predetermined number of times, copying data from the first server memory to the second server memory.

3. The method of claim 1 comprising the additional step of, in conjunction with the booting of the first server, operating the second server.

4. The method of claim 1 wherein the operating step comprises providing server services to the network.

5. The method of claim 3 wherein the second operating step comprises providing server services to the network.

6. The method of claim 1 wherein the maintaining step comprises maintaining the second server in a backup mode so that the second server can be associated with the primary server address when a time period elapses wherein the response is not received within the time period.

7. The method of claim 1 wherein the primary server address is an Internet protocol address.

8. The method of claim 1 wherein the signaling step comprises pinging the primary server address.

9. The method of claim 1 wherein the response to the first signal in the time period is indicative of operation of the first server as the primary server, and an absence of the response to the first signal in the time period is indicative of primary server malfunction or inactivity.

10. The method of claim 1 comprising the additional steps of, in conjunction with the booting of the first server:

signaling, using a second signal, the monitor server address; and

monitoring for a response to the second signal within a second time period.

11. The method of claim 10 wherein a response to the second signal is received within the secondary time period, and the second server is operated as a monitor server.

12. The method of claim 10 wherein a response to the second signal is not received within the second time period, and the second server is thereafter operated as a primary server.

13. A system for operating redundant computers comprising:

a carrier containing computer program instructions thereon, wherein the instructions instruct a computer processor to perform the steps of;

signaling, using a signal, a primary server address;

monitoring for a response to the signal within a predetermined time period; and

repeating the signaling step and the monitoring step until a time period elapses wherein the response is not received within the time period, and thereafter performing the step of booting a first server.

14. The system of claim 13 wherein the instructions also instruct the processor to perform the additional step of, after the signaling step is repeated a predetermined number of times, copying data from a first server memory to a second server memory.

15. The system of claim 13 wherein the instructions also instruct the processor to perform the additional step of, in conjunction with the booting of the first server, operating a second server.

16. The system of claim 13 wherein the instructions also instruct the processor to maintain the second server in a backup mode so that operation of the second server can be provided when a time period elapses wherein the response is not received within the time period.

17. The system of claim 13 wherein the primary server address is an Internet protocol address.

18. The system of claim 13 wherein the response to the signal in the time period is indicative of primary server operation, and an absence of the response to the signal in the time period is indicative of primary server malfunction or inactivity.

19. The system of claim 13 further comprising:

a first computing apparatus including a first memory, the first computer apparatus being communicatively connected to a network and corresponding to the primary server address;

a second computing apparatus including a second memory, the second computing apparatus in communication with the network, configured in parallel with the first computing apparatus, and having a secondary server address; and

a processor.

20. A redundant computer system comprising:

a first computing apparatus communicatively connected to a network and corresponding to a primary server address;

a second computing apparatus in communication with the network and configured in parallel with the first computing apparatus, and associated with monitor server address;

a means for signaling the primary server address;

a means for monitoring for a response to the signal within a predetermined time period; and

a means for repeating the signaling step and the monitoring step until a time period elapses wherein the response is not received within the time period; and

a means for booting the first server.