Intelligent data storage manager

• US 7,114,013 B2
• Filed: 09/28/2001
• Issued: 09/26/2006
• Est. Priority Date: 01/15/1999
• Status: Expired due to Term

• Current Assignee: Storage Technology Corp (Oracle Corporation)
• Original Assignee: Storage Technology Corp (Oracle Corporation)
• Inventors: Johnson, Steven A., West, Thomas David, Blendermann, Stephen Henry, Schafer, Charles Patrick, Laughlin, Jeffrey Steven, Bakke, Mark Alan, Halladay, Steven, Wojnar, Michael C., Rudeseal, George Arthur
• Primary Examiner(s): Perveen, Rehana
• Application Number:
  US09/966,263
• Publication Number:
  US 20020032816A1
• Time in Patent Office: 1,824 Days
• Field of Search: 710/5, 710/36, 710/200, 711/100, 711/114, 379/219
• US Class Current: 710/5
• CPC Class Codes: G06F 16/122 using management policies backup systems G06F11/1446; file migration policies for HSM systems G06F16/185
• 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 3/0685 Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays

Abstract

The intelligent data storage manager functions to combine the non-homogeneous physical devices contained in a data storage subsystem to create a logical device with new and unique quality of service characteristics that satisfy the criteria for the policies appropriate for the present data object. In particular, if there is presently no logical device that is appropriate for use in storing the present data object, the intelligent data storage manager defines a new logical device using existing physical and/or logical device definitions as component building blocks to provide the appropriate characteristics to satisfy the policy requirements. The intelligent data storage manager uses weighted values that are assigned to each of the presently defined logical devices to produce a best fit solution to the requested policies in an n-dimensional best fit matching algorithm. The resulting logical device definition is then implemented by dynamically interconnecting the logical devices that were used as the components of the newly defined logical device to store the data object.

Claims

1. A data storage manager operational in a data storage subsystem that uses a plurality of data storage elements to store data thereon for a plurality of host processors that are connected to said data storage subsystem, comprising:

means for storing a set of logical data storage device definitions that are created from said plurality of data storage elements;

means for identifying a set of data storage characteristics appropriate for a present data object;

means for comparing said identified set of data storage characteristics with said stored set of logical data storage device definitions;

means, responsive to a failure to match said identified set of data storage characteristics with a single one of said stored set of logical data storage device definitions, for creating a new logical device definition using a plurality of said stored set of logical data storage device definitions; and

means for storing said present data object on interconnected ones of said plurality of data storage elements that correspond to said new logical device definition.

2. The data storage manager of claim 1 wherein said means for storing comprises:

means for allocating space on an existing instance of said interconnected ones of said plurality of data storage elements that correspond to said new logical device definition.

3. The data storage manager of claim 1 wherein said means for storing comprises:

means for creating a new instance of said interconnected ones of said plurality of data storage elements that correspond to said new logical device definition.

4. The data storage manager of claim 1 wherein said means for storing comprises:

means for storing data indicative of a plurality of data storage attributes from the class of data storage attributes comprising;

speed of access to first byte, level of reliability, cost of storage, probability of recall, and expected data transfer rate.

15. The data storage manager of claim 1 wherein at least some of the plurality of data storage elements are non-homogeneous physical devices, and portions of a plurality of the non-homogeneous physical devices are logically associated in creating the new logical device definitions.

5. A method of operating a data storage manager operational in a data storage subsystem that uses a plurality of data storage elements to store data thereon for a plurality of host processors that are connected to said data storage subsystem, comprising the steps of:

storing a set of logical data storage device definitions that are created from said plurality of data storage elements;

identifying a set of data storage characteristics appropriate for a present data object;

comparing said identified set of data storage characteristics with said stored set of logical data storage device definitions;

creating, in response to a failure to match said identified set of data storage characteristics with a single one of said stored set of logical data storage device definitions, a new logical device definition using a plurality of said stored set of logical data storage device definitions; and

storing said present data object on interconnected ones of said plurality of data storage elements that correspond to said new logical device definition.

6. The method of operating a data storage manager of claim 5 wherein said step of storing comprises:

allocating space on an existing instance of said interconnected ones of said plurality of data storage elements that correspond to said new logical device definition.

7. The method of operating a data storage manager of claim 5 wherein said step of storing further comprises:

creating a new instance of said interconnected ones of said plurality of data storage elements that correspond to said new logical device definition.

8. The method of operating a data storage manager of claim 5 wherein said step of storing comprises:

storing data indicative of a plurality of data storage attributes from the class of data storage attributes comprising;

speed of access to first byte, level of reliability, cost of storage, probability of recall, and expected data transfer rate.

9. A data storage manager operational in a data storage subsystem that uses a plurality of data storage elements to store data thereon for a plurality of host processors that are coupled to said data storage subsystem, comprising:

means for maintaining at least one storage attribute associated with a logical data storage device, said logical data storage device comprising at least a portion of said plurality of data storage elements;

means for identifying at least one storage attribute appropriate for a present data object;

means for comparing said identified storage attribute with said maintained storage attribute;

means, responsive to a failure to match said identified storage attribute with said maintained storage attribute, for creating a new logical data storage device; and

means for storing said present data object on that portion of said plurality of data storage elements that correspond to said new logical data storage device.

10. The data storage manager of claim 9, wherein said new logical data storage device comprises both physical and logical data storage elements.

16. The data storage manager of claim 9 wherein at least some of the plurality of data storage elements are non-homogeneous physical devices, and the new logical data storage device is defined using portions of a plurality of the non-homogeneous physical devices.

11. A data storage manager operational in a data storage subsystem that uses a plurality of data storage elements to store data thereon for a plurality of host processors that are coupled to said data storage subsystem, comprising:

means for maintaining at least one storage attribute associated with a logical data storage device, said logical data storage device comprising at least a portion of said plurality of data storage elements;

means for identifying at least one storage attribute appropriate for a present data object;

means for comparing said identified storage attribute with said maintained storage attribute;

means, responsive to a match of said identified storage attribute with said maintained storage attribute, for creating a new instantiation of said logical data storage device; and

means for storing said present data object on that portion of said plurality of data storage elements that correspond to said new instantiation of said logical data storage device.

12. The data storage manager of claim 11, wherein said new instantiation of said logical data storage device comprises both physical and logical data storage elements.

17. The data storage manager of claim 11 wherein at least some of the plurality of data storage elements are non-homogeneous physical devices, and the new instantiation of the logical data storage device is defined using portions of a plurality of the non-homogeneous physical devices.

13. In a data storage manager operational in a data storage subsystem that uses a plurality of data storage elements to store data thereon for a plurality of host processors that are coupled to said data storage subsystem, a method comprising the steps of:

maintaining at least one storage attribute associated with a logical data storage device, said logical data storage device comprising at least a portion of said plurality of data storage elements;

identifying at least one storage attribute appropriate for a present data object;

comparing said identified storage attribute with said maintained storage attribute;

creating, responsive to a failure to match said identified storage attribute with said maintained storage attribute, a new logical data storage device; and

storing said present data object on that portion of said plurality of data storage elements that correspond to said new logical data storage device.

14. A data storage manager operational in a data storage subsystem that uses a plurality of data storage elements to store data thereon for a plurality of host processors that are coupled to said data storage subsystem, comprising:

maintaining at least one storage attribute associated with a logical data storage device, said logical storage device comprising at least a portion of said plurality of data storage elements;

identifying at least one storage attribute appropriate for a present data object;

comparing said identified storage attribute with said maintained storage attribute;

creating, responsive to a match of said identified storage attribute with said maintained storage attribute, a new instantiation of said logical data storage device; and

storing said present data object on that portion of said plurality of data storage elements that correspond to said new instantiation of said logical data storage device.