Multi-computer fault detection system

• US 20020120884A1
• Filed: 08/14/2001
• Published: 08/29/2002
• Est. Priority Date: 02/26/2001
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Ohno, Hiroshi, Yokoyama, Takanori, Saito, Masahiko, Nakamikawa, Tetsuaki
• Application Number:
  US09/928,309
• Publication Number:
  US 20020120884A1
• Time in Patent Office: Days
• US Class Current: 714/31
• CPC Class Codes: G06F 11/1482 by means of middleware or OS functionality
• CPC Class Codes: G06F 11/1484 involving virtual machines
• CPC Class Codes: G06F 11/2028 eliminating a faulty processor or activating a spare
• CPC Class Codes: G06F 11/2046 where the redundant components share persistent storage G06F11/2043 takes precedence
• CPC Class Codes: G06F 11/2051 in regular structures

Abstract

The present invention provides a multi-computer fault detection system comprising a plurality of computers in communication with each other, the computers comprising, a processor, a plurality of operating systems executed by the processor and a main memory for storing a task executed on one of the operating systems wherein the monitoring is whether a fault has occurred in another one of the operating systems wherein at least one of the computers with the fault alerts another one of the computers.

Claims

1. A multi-computer fault detection system comprising:

a plurality of computers in communication with each other, said computers comprising;

a processor;

a plurality of operating systems executed by said processor; and

a main memory for storing a task executed on one of said operating systems wherein said monitoring is whether a fault has occurred in another one of said operating systems wherein at least one of said computers with said fault alerts another one of said computers.

2. The system of claim 1 wherein said operating systems monitoring said fault is a real-time operating system.

3. The system of claim 1 wherein said another one of said operating systems is a non-real time operating system.

4. The system of claim 1 wherein said operating system monitoring said fault and said another one of said operating systems in one of said computers communicates separately with the same corresponding operating systems of another one of said computers.

5. The system of claim 1 wherein each said computer contains hardware shared by said operating systems.

6. The system of claim 1 wherein said main memory stores an operating system switchover program for switching between said plurality of operating systems when an interrupt signal is entered to said processor.

7. The system of claim 1 wherein each of said plurality of operating systems monitors said fault.

8. The system of claim 1 wherein said plurality of operating systems further includes a host operating system for monitoring fault on one or more virtual operating systems executed on said host operating system.

9. A multi-computer fault detection system comprising:

a plurality of computers in communication with each other, said computers comprising;

a processor;

a plurality of operating systems executed by said processor; and

a main memory for storing a task executed on each of said operating systems wherein said monitoring is whether a fault has occurred in another one of said operating systems wherein at least one of said computers with said fault alerts another one of said computers.

10. The system of claim 9 wherein said operating systems monitoring said fault is a real-time operating system.

11. The system of claim 9 wherein said another one of said operating systems is a non-real time operating system.

12. The system of claim 9 wherein said operating system monitoring said fault and said another one of said operating systems in one of said computers communicates separately with the same corresponding operating systems of another one of said computers.

13. The system of claim 9 wherein each said computer contains hardware shared by said operating systems.

14. The system of claim 9 wherein said main memory stores an operating system switchover program for switching between said plurality of operating systems when an interrupt signal is entered to said processor.

15. The system of claim 9 wherein said plurality of operating systems further includes a host operating system for monitoring fault on one or more virtual operating systems executed on said host operating system.

17. The system of claim 16 wherein said operating systems monitoring said fault is a real-time operating system.

18. The system of claim 16 wherein said another one of said operating systems is a non-real time operating system.

19. The system of claim 16 wherein said operating system monitoring said fault and said another one of said operating systems in one of said computers communicates separately with the same corresponding operating systems of another one of said computers.

20. The system of claim 16 wherein each said computer contains hardware shared by said operating systems.

21. The system of claim 16 wherein each of said plurality of operating systems monitors said fault.

16. A multi-computer fault detection system comprising:

a plurality of computers in communication with each other, said computers comprising;

a processor;

a plurality of operating systems executed by said processor; and

a main memory for storing a task executed on a host operating system for monitoring a fault on one or more virtual operating systems executed on said host operating system wherein at least one of said computers with said fault alerts another one of said computers.

22. A method for fault detection in a multi-computer system comprising the steps of:

providing a plurality of computers in communication with each other, said step of providing computers further comprising the steps of;

providing a processor;

providing a plurality of operating systems executed by said processor; and

providing a main memory for storing a task executed on one of said operating systems wherein said monitoring is whether a fault has occurred in another one of said operating systems wherein at least one of said computers with said fault alerts another one of said computers.

23. The method of claim 22 wherein said operating systems monitoring said fault is a real-time operating system.

24. The method of claim 22 wherein said another one of said operating systems is a non-real time operating system.

25. The method of claim 22 wherein said operating system monitoring said fault and said another one of said operating systems in one of said computers communicates separately with the same corresponding operating systems of another one of said computers.

26. The method of claim 22 wherein each said computer contains hardware shared by said operating systems.

27. The method of claim 22 wherein said main memory stores an operating system switchover program for switching between said plurality of operating systems when an interrupt signal is entered to said processor.

28. The method of claim 22 wherein each of said plurality of operating systems monitors said fault.

29. The method of claim 22 wherein said plurality of operating systems further includes a host operating system for monitoring fault on one or more virtual operating systems executed on said host operating system.

30. A method for fault detection in a multi-computer system comprising the steps of:

providing a plurality of computers in communication with each other, said step of providing computers further comprising the steps of;

providing a processor;

providing a plurality of operating systems executed by said processor; and

providing a main memory for storing a task executed on each of said operating systems wherein said monitoring is whether a fault has occurred in another one of said operating systems wherein at least one of said computers with said fault alerts another one of said computers.

31. The method of claim 30 wherein said operating systems monitoring said fault is a real-time operating system.

32. The method of claim 30 wherein said another one of said operating systems is a non-real time operating system.

33. The method of claim 30 wherein said operating system monitoring said fault and said another one of said operating systems in one of said computers communicates separately with the same corresponding operating systems of another one of said computers.

34. The method of claim 30 wherein each said computer contains hardware shared by said operating systems.

35. The method of claim 30 wherein said main memory stores an operating system switchover program for switching between said plurality of operating systems when an interrupt signal is entered to said processor.

36. The method of claim 30 wherein said plurality of operating systems further includes a host operating system for monitoring fault on one or more virtual operating systems executed on said host operating system.

38. The method of claim 37 wherein said operating systems monitoring said fault is a real-time operating system.

39. The method of claim 37 wherein said another one of said operating systems is a non-real time operating system.

40. The method of claim 37 wherein said operating system monitoring said fault and said another one of said operating systems in one of said computers communicates separately with the same corresponding operating systems of another one of said computers.

41. The method of claim 37 wherein each said computer contains hardware shared by said operating systems.

42. The method of claim 37 wherein each of said plurality of operating systems monitors said fault.

37. A method for fault detection in a multi-computer system comprising the steps of:

providing a plurality of computers in communication with each other, said step of providing computers further comprising the steps of;

providing a processor;

providing a plurality of operating systems executed by said processor; and

providing a main memory for storing a task executed on a host operating system for monitoring a fault on one or more virtual operating systems executed on said host operating system wherein at least one of said computers with said fault alerts another one of said computers.