Operating system migration with minimal storage area network reconfiguration

• US 8,924,499 B2
• Filed: 12/14/2004
• Issued: 12/30/2014
• Est. Priority Date: 12/14/2004
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Allen, James P., Eisenhauer, Daniel G., Frazier, Giles Roger, Kovacs, Robert George, Sharma, Satya Prakesh
• Primary Examiner(s): Donabed, Ninos
• Assistant Examiner(s): RICHARDSON, THOMAS W
• Application Number:
  US11/011,244
• Publication Number:
  US 20060130052A1
• Time in Patent Office: 3,668 Days
• Field of Search: 709/213, 709/221, 709/226, 717/172, 717/171, 717/173, 717/178
• US Class Current: 709/213
• CPC Class Codes: G06F 8/63 Image based installation; Cloning; Build to order
• CPC Class Codes: H04L 41/0846 based on copy from other elements
• CPC Class Codes: H04L 41/40 using virtualisation of network functions or resources, e.g. SDN or NFV entities

Abstract

Methods, systems, and computer program products are provided for migrating an operating system from a source computer to a destination computer. Some embodiments include identifying a destination adapter of the destination computer that is coupled for data communications to a SAN that is also coupled for data communications to a source adapter of the source computer, logging off a virtual port name of the source adapter from the login manager, deregistering the virtual port name from the source adapter, registering the virtual port name with the destination adapter, and logging on the destination adapter to the login manager with the virtual port name. Typical embodiments also include transferring the operating system from the source computer to the destination computer.

Claims

1. A method for migrating an operating system from a source computer to a destination computer, the method comprising:

identifying a destination adapter of the destination computer that is coupled for data communications to a storage area network that is also coupled for data communications to a source adapter of the source computer;

identifying a zone of the storage area network for the source adapter;

removing the source adapter from the zone;

adding the destination adapter to the zone;

after adding the destination adapter to the zone, logging off the source adapter from a login manager of the storage area network;

after logging off the source adapter from the login manager and after the operating system has been transferred from the source computer to the destination computer,

logging on the destination adapter to the login manager.

2. The method of claim 1 wherein said removing the source adapter from the zone comprises:

identifying storage devices of the zone associated with the source adapter;

disassociating the source adapter from the storage devices; and

deleting the source adapter from the zone.

3. The method of claim 1 wherein said adding the destination adapter to the zone comprises:

including the destination adapter in the zone;

identifying storage devices of the zone associated with the source adapter; and

associating the destination adapter with the storage devices.

4. The method of claim 1 wherein said identifying the destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to the source adapter of the source computer comprises querying a server within the storage area network and receiving a world-wide port name of the destination adapter and querying the server and receiving an identifier of the destination computer based on the world-wide port name.

5. The method of claim 2 wherein said identifying the zone of the storage area network for the zone comprises querying a zone manager for the zone and receiving from the zone manager a zone identifier and an identifier of the source adapter, wherein said identifying the storage devices of the zone comprises querying the zone manager and receiving identifiers of the storage devices.

6. A system for migrating an operating system from a source computer to a destination computer, the system comprising:

a processor;

a network interface; and

a migration module operable to,

identify a destination adapter of the destination computer that is coupled for data communications to a storage area network that is also coupled for data communications to a source adapter of the source computer,

identify a zone of the storage area network for the source adapter,

remove the source adapter from the zone;

add the destination adapter to the zone;

after adding the destination adapter to the zone, log off the source adapter from a login manager of the storage area network;

after logging off the source adapter from the login manager and after the operating system has been transferred from the source computer to the destination computer,

log on the destination adapter to the login manager.

7. The system of claim 6 wherein the migration module being operable to remove the source adapter from the zone comprises the migration module being operable to:

identify storage devices of the zone associated with the source adapter;

disassociate the source adapter from the storage devices; and

delete the source adapter from the zone.

8. The system of claim 6 wherein the migration module being operable to add the destination adapter to the zone comprises the migration module being operable to:

include the destination adapter in the zone;

identify storage devices of the zone associated with the source adapter; and

associate the destination adapter with the storage devices.

9. The system of claim 6 wherein the migration module being operable to identify the destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to the source adapter of the source computer comprises the migration module being operable to query a server within the storage area network for a world-wide port name of the destination adapter and receive the world-wide port name of the destination adapter and being operable to query the server for an identifier of the destination of the computer based on the world-wide port name and receive the identifier of the destination computer.

10. The system of claim 7 wherein the migration module being operable to identify the zone of the storage area network for the source adapter comprises the migration module being operable to query a zone manager and to receive, in response, from the zone manager a zone identifier and an identifier of the source adapter, wherein the migration module being operable to identify the storage devices of the zone comprises the migration module being operable to query the zone manager and to receive, in response, identifiers of the storage devices.

11. A computer program product for migrating an operating system from a source computer to a destination computer, the computer program product disposed on a non-transitory computer-readable recording medium, the computer program product comprising program code executable to cause a data processing system to:

identify a destination adapter of the destination computer that is coupled for data communications to a storage area network that is also coupled for data communications to a source adapter of the source computer;

identify a zone of the storage area network for the source adapter;

remove the source adapter from the add the destination adapter to the zone;

after adding the destination adapter to the zone, log off the source adapter from a login manager of the storage area network

after logging off the source adapter from the login manager and transferring the operation system from the source computer to the destination computer,

log on the destination adapter to the login manager.

12. The computer program product of claim 11 wherein the program code being executable to cause the data processing system to remove the source adapter from the zone comprises the program code being executable to cause the data processing system to:

identify storage devices associated with the source adapter;

disassociate the source adapter from the storage devices; and

delete the source adapter from the zone.

13. The computer program product of claim 11 wherein the computer program code being executable to cause the data processing system to add the destination adapter to the zone comprises the computer program code being executable to cause the data processing system to:

including the destination adapter in the zone;

identify storage devices associated with the source adapter; and

associate the destination adapter with the storage devices.

14. The computer program product of claim 11 wherein the computer program code being executable to cause the data processing system to identify the destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to the source adapter of the source computer comprises the computer program code being executable to cause the data processing system to query a server within the storage area network for a world-wide port name of the destination adapter and to receive the world-wide port name, and to query the server with the world-wide port name and to receive an identifier of the destination computer.

15. The computer program product of claim 12 wherein the computer program code being executable to cause the data processing system to identify the zone of the storage area network for the source adapter comprises the computer program code being executable to cause the data processing system to query a zone manager and to receive, in response, from the zone manager a zone identifier and an identifier of the source adapter, wherein the computer program code being executable to cause the data processing system to identify the storage devices of the zone comprises the computer program code being executable to cause the data processing system to query the zone manager and to receive, in response, identifiers of the storage devices.

16. A method for migrating an operating system from a source computer to a destination computer, the method comprising:

identifying a destination adapter of the destination computer that is coupled for data communications to a storage area network that is also coupled for data communications to a source adapter of the source computer;

logging off a virtual port name of the source adapter from a login manager of the storage area network;

deregistering the virtual port name from the source adapter;

after transferring the operating system from the source computer to the destination computer, registering the virtual port name with the destination adapter; and

logging on the destination adapter to the login manager with the virtual port name.

17. The method of claim 16 further comprising logging off input/output devices that provide access to storage devices of the storage area network after logging off the virtual port name of the source adapter from the login manager.

18. The method of claim 16 wherein said identifying the destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to the source adapter of the source computer comprises querying a server within the storage area network for an identifier of the destination adapter, and querying the server for an identifier of the destination computer with the identifier of the destination adapter.

19. The method of claim 16 wherein said logging off the virtual port name of the source adapter from the login manager comprises disassociating an N_Port ID from the virtual port name.

20. The method of claim 16 wherein said logging on the destination adapter to the login manager with the virtual port name comprises associating an N_Port ID with the virtual port name.

21. A system for migrating an operating system from a source computer to a destination computer, the system comprising:

a processor;

a network interface; and

a migration module operable to,

identify a destination adapter of the destination computer that is coupled for data communications to a storage area network that is also coupled for data communications to a source adapter of the source computer;

log off a virtual port name of the source adapter from a login manager of the storage area network;

deregister the virtual port name from the source adapter;

after the operating system has been transferred from the source computer to the destination computer, register the virtual port name with the destination adapter; and

log on the destination adapter to the login manager with the virtual port name.

22. The system of claim 21 wherein the migration module being further operable to log off input/output devices that provide access to storage devices of the storage area network after logging off the virtual port name of the source adapter from the login manager.

23. The system of claim 21 wherein the migration module being operable to identify the destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to the source adapter of the source computer comprises the migration module being operable to query a server within the storage area network for an identifier of the destination adapter, and to query the server for an identifier of the destination computer with the identifier of the destination adapter.

24. The system of claim 21 wherein said the migration module being operable to log off the virtual port name of the source adapter from the login manager comprises the migration module being operable to disassociate an N_Port ID from the virtual port name.

25. The system of claim 21 wherein the migration module being operable to log on the destination adapter to the login manager with the virtual port name comprises the migration module being operable to associate an N_Port ID with the virtual port name.

26. A computer program product for migrating an operating system from a source computer to a destination computer, the computer program product disposed on a non-transitory computer-readable recording medium, the computer program product, which when executed by a data processing system, causes the data processing system to perform operations that comprise:

identifying a destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to a source adapter of the source computer;

logging off a virtual port name of the source adapter from a login manager of the storage area network;

deregistering the virtual port name from the source adapter;

registering the virtual port name with the destination adapter; and

after the operating system has been transferred from the source computer to the destination computer, logging on the destination adapter to the login manager with the virtual port name.

27. The computer program product of claim 26 wherein the operations further comprise logging off input/output devices that provide access to storage devices of the storage area network after logging off the virtual port name of the source adapter from the login manager.

28. The computer program product of claim 26 wherein the operation of identifying the destination adapter of the destination computer that is coupled for data communications to the storage area network that is also coupled for data communications to the source adapter of the source computer comprises querying a server within the storage area network for an identifier of the destination adapter, and querying the server for an identifier of the destination computer with the identifier of the destination adapter.

29. The computer program product of claim 26 wherein the operation of logging off the virtual port name of the source adapter from the login manager comprises disassociating an N_Port ID from the virtual port name.

30. The computer program product of claim 26 wherein the operation of logging on the destination adapter to the login manager with the virtual port name comprises associating an N_Port ID with the virtual port name.