Method and system for assigning or creating a resource

• US 20050138174A1
• Filed: 12/17/2003
• Published: 06/23/2005
• Est. Priority Date: 12/17/2003
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Webster, Kevin J., Lamb, Michael L., Swank, Raymond M., Groves, David W.
• Granted Patent: US 7,500,000 B2
• Time in Patent Office: Days
• US Class Current: 709/226
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0617 in relation to availability
• CPC Class Codes: G06F 3/0631 by allocating resources to storage systems
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: Y10S 707/99938 Concurrency, e.g. lock management in shared database

Abstract

An example of a method for assigning a resource (for example, storage) includes receiving a request for a resource, wherein the request includes a list of paths. This example also includes retrieving a HardwareAccount, Controller, and an AccessAuthorization object for a first path in the list of paths. This example further includes making an attach device request to a CIMOM for a first available resource, using the Controller and the AccessAuthorization object. This example also includes determining if the first available resource was successfully attached, and if so, recording the assignment as successful, and if not, rolling back all assignments for the first available resource that were previously recorded as successful. Another aspect of the invention is a method for creating at least one LUN.

Claims

1. A signal bearing medium tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform a method for assigning a resource, the method comprising the following operations:

receiving a request for a resource, wherein the request includes a list of paths;

retrieving a HardwareAccount, Controller, and an AccessAuthorization object for a first path in the list of paths;

making an attach device request to a CIMOM for a first available resource, using the Controller and the AccessAuthorization object;

determining if the first available resource was successfully attached,

and if so, recording the assignment as successful;

and if not, rolling back all assignments for the first available resource that were previously recorded as successful.

2. The signal bearing medium of claim 1, wherein the resource is storage, and wherein the request further includes a requested amount of storage space, and wherein the first available resource is a first available LUN.

3. The signal bearing medium of claim 2, wherein if it is determined that the first available LUN was successfully attached on the first path, the operations further comprise repeating the retrieving, making, and determining operations for the first available LUN for a second path in the list of paths.

4. The signal bearing medium of claim 2, wherein the request further comprises a requested number of LUNs.

5. The signal bearing medium of claim 2, wherein if it is determined that the first available LUN was successfully attached using each path in the list of paths, then the operations further comprise sending assignment information to a requesting device.

6. The signal bearing medium of claim 2, wherein the making and determining operations are repeated for a second available LUN.

7. The signal bearing medium of claim 6, wherein if it is determined that the second available LUN was successfully attached on the first path, the operations further comprise repeating the retrieving, making, and determining operations for the second available LUN for a second path in the list of paths.

8. The signal bearing medium of claim 2, wherein the operations further comprise selecting the first available LUN from all LUNs in a SAN that are accessible by a requesting device.

9. The signal bearing medium of claim 8, wherein a best fit algorithm is used for selecting the first available LUN.

10. The signal bearing medium of claim 2, wherein the operations further comprise selecting the first available LUN from all LUNs in a storage pool that are accessible by a requesting device.

11. The signal bearing medium of claim 10, wherein a best fit algorithm is used for selecting the first available LUN.

12. The signal bearing medium of claim 2, wherein the method further comprises the operation of determining if connectivity information is good, and if it is determined that the connectivity information is not good, then the method further comprises the operation of failing the request.

13. A computing system, comprising:

a memory; and

a processing device coupled to the memory, wherein the processing device is programmed to perform operations for assigning storage, the operations comprising;

receiving a request for storage, wherein the request includes a requested amount of storage space and a list of paths;

retrieving a HardwareAccount, Controller, and an AccessAuthorization object for a first path in the list of paths;

making an attach device request to a CIMOM for a first available LUN, using the Controller and the AccessAuthorization object;

determining if the first available LUN was successfully attached,

and if so, recording the assignment as successful;

and if not, rolling back all assignments for the first available LUN that were previously recorded as successful.

14. A computing system, comprising:

means for receiving a request for a resource, wherein the request includes a list of paths;

means for retrieving a HardwareAccount, Controller, and an AccessAuthorization object for a first path in the list of paths;

means for making an attach device request to a CIMOM for a first available resource, using the Controller and the AccessAuthorization object;

means for determining if the first available resource was successfully attached;

means for recording the assignment as successful; and

means for rolling back all assignments for the first available resource that were previously recorded as successful, if the first available resource was not successfully attached.

15. A method for assigning storage, comprising the following operations:

receiving a request for storage, wherein the request includes a requested amount of storage space and a list of paths;

retrieving a HardwareAccount, Controller, and an AccessAuthorization object for a first path in the list of paths;

making an attach device request to a CIMOM for a first available LUN, using the Controller and the AccessAuthorization object;

determining if the first available LUN was successfully attached,

and if so, recording the assignment as successful;

and if not, rolling back all assignments for the first available LUN that were previously recorded as successful.

16. A signal bearing medium tangibly embodying a program of machine-readable instructions executable by a digital processing apparatus to perform a method for creating at least one LUN, the method comprising the following operations:

receiving a request to create storage, wherein the request specifies a LUN size and a requested number of LUNs;

selecting a StoragePool object with available space to create the requested number of LUNs;

retrieving a StorageConfigurationService of a disk storage system using the association of all ComputerSystem objects to the selected StoragePool object;

associating a ComputerSystem object representing the disk storage system with the StorageConfigurationService;

setting the LUN size equal to a calculated size;

setting the storage pool as the selected StoragePool object; and

invoking a CreateOrModifyElementFromStoragePool( ) method through the retrieved StorageConfigurationService for each LUN in the requested number of LUNs.

17. The signal bearing medium of claim 16, wherein the operations further comprise calculating the LUN size based on a constraint of a disk storage system.

18. The signal bearing medium of claim 16, wherein the operations further comprise returning a list of LUNs.

19. The signal bearing medium of claim 18, wherein the operations further comprise assigning the LUNs on the list of LUNs to a requesting host.

20. The signal bearing medium of claim 19, wherein the operations further comprise sending LUN assignment information to the requesting host.

21. The signal bearing medium of claim 16, wherein the receiving operation further comprises receiving a list of storage pools.

22. The signal bearing medium of claim 16, wherein a size constraint from a caller is used in the calculating operation.

23. The signal bearing medium of claim 16, wherein the operations further comprise converting the calculated size from megabytes to million bytes.

24. The signal bearing medium of claim 16, further comprising setting an ElementType to a value selected from the set consisting of Storage Volume and StorageExtent.

25. The signal bearing medium of claim 16, wherein the operations further comprise selecting a storage setting based on a desired redundancy.

26. The signal bearing medium of claim 16, wherein the operations further comprise determining if an error has occurred and if so, the operations further comprise recording the error, and if an additional StoragePool object with available space is available, the operations further comprise selecting an additional StoragePool object with available space to create the at least one LUNs, and repeating the retrieving, associating, setting the storage pool, and the invoking operations using the additional StoragePool object as the selected StoragePool object.

27. A computing system, comprising:

a memory; and

a processing device coupled to the memory, wherein the processing device is programmed to perform operations for creating at least one LUN, the operations comprising;

receiving a request to create storage, wherein the request specifies a LUN size and a requested number of LUNs;

calculating a size based on a constraint of a disk storage system;

selecting a StoragePool object with available space to create the requested number of LUNs;

retrieving a StorageConfigurationService of a disk storage system using the association of all ComputerSystem objects to the selected StoragePool object;

associating a ComputerSystem object representing the disk storage system with the StorageConfigurationService;

setting the size equal to the calculated size;

setting the storage pool as the selected StoragePool object;

invoking a CreateOrModifyElementFromStoragePool( ) method through the retrieved StorageConfigurationService for each LUN in the requested number of LUNs; and

returning a list of LUNs.

28. A computing system, comprising:

means for receiving a request to create storage, wherein the request specifies a LUN size and a requested number of LUNs;

means for selecting a StoragePool object with available space to create the requested number of LUNs;

means for retrieving a StorageConfigurationService of a disk storage system using the association of all ComputerSystem objects to the selected StoragePool object;

means for associating a ComputerSystem object representing the disk storage system with the StorageConfigurationService;

means for setting the size equal to a calculated size;

means for setting the storage pool as the selected StoragePool object; and

means for invoking a CreateOrModifyElementFromStoragePool( ) method through the retrieved StorageConfigurationService for each LUN in the requested number of LUNs.

29. A method for creating at least one LUN, comprising the following operations:

receiving a request to create storage, wherein the request specifies a LUN size and a requested number of LUNs;

selecting a StoragePool object with available space to create the requested number of LUNs;

retrieving a StorageConfigurationService of a disk storage system using the association of all ComputerSystem objects to the selected StoragePool object;

associating a ComputerSystem object representing the disk storage system with the StorageConfigurationService;

setting the size equal to a calculated size;

setting the storage pool as the selected StoragePool object;

invoking a CreateOrModifyElementFromStoragePool( ) method through the retrieved StorageConfigurationService for each LUN in the requested number of LUNs; and

returning a list of LUNs.