Slice server method and apparatus of dispersed digital storage vaults

• US 8,200,788 B2
• Filed: 06/16/2010
• Issued: 06/12/2012
• Est. Priority Date: 10/09/2007
• Status: Expired due to Fees

• Current Assignee: Pure Storage, Inc.
• Original Assignee: Cleversafe Incorporated (International Business Machines Corporation)
• Inventors: Leggette, Wesley, Mark, Zachary J., Quigley, John, Motwani, Manish, Palthepu, Srinivas
• Primary Examiner(s): DINH, KHANH Q
• Application Number:
  US12/817,140
• Publication Number:
  US 20100250751A1
• Time in Patent Office: 727 Days
• Field of Search: 709/219, 709/224, 709/229, 709/220, 709/227
• US Class Current: 709/219
• CPC Class Codes: G06F 16/182 Distributed file systems
• CPC Class Codes: G06F 16/188 Virtual file systems

Abstract

A slicer server includes a network port, memory, and a central processing module. The central processing unit functions to obtain, via the network port, an information record regarding a virtual dispersed data storage container. The central processing unit further functions to determine whether its list of virtual dispersed data storage containers includes the virtual dispersed data storage container. The central processing unit further functions to, when the list does not include the virtual dispersed data storage container, update the list to include the virtual dispersed data storage container and allocate a portion of the memory to the virtual dispersed data storage container.

Claims

1. A method for execution by a slice server, the method comprises:

obtaining an information record regarding a virtual dispersed data storage container, wherein a plurality of slice servers stores a plurality of data slices within the virtual dispersed data storage container and wherein a data segment is encoded using an information dispersal algorithm to produce the plurality of data slices;

determining whether a list of virtual dispersed data storage containers of the slice server includes the virtual dispersed data storage container;

when the list does not include the virtual dispersed data storage container;

updating the list to include the virtual dispersed data storage container; and

allocating memory in the plurality of slice servers to the virtual dispersed data storage container.

2. The method of claim 1, wherein the obtaining the information record comprises:

querying a registry for one or more information records that identify the slice server, when the one or more information records includes the information record.

3. The method of claim 2 further comprises:

interpreting the list;

when a second virtual dispersed data storage container is on the list and the slice server is not identified in the one or more information records, determining whether memory is allocated to the second virtual dispersed data storage container; and

when memory is allocated to the second virtual dispersed data storage container, unallocating the memory to the virtual dispersed data storage container.

4. The method of claim 1 further comprises:

obtaining a second information record regarding a second virtual dispersed data storage container;

determining whether the list of virtual dispersed data storage containers of the slice server includes the second virtual dispersed data storage container;

when the list does not include the second virtual dispersed data storage container;

updating the list to include the second virtual dispersed data storage container; and

allocating memory to the second virtual dispersed data storage container.

5. The method of claim 1 further comprises:

verifying that the slice server is associated with the virtual dispersed data storage container by determining that the slice server is identified in a vault object of the information record.

6. The method of claim 1 further comprises:

determining whether the virtual dispersed data storage container has been deleted based on the information record; and

when the virtual dispersed data storage container has been deleted, un-allocating memory to the virtual dispersed data storage container.

7. A slicer server comprises:

a network port for coupling to a network;

memory; and

a central processing unit operable to the memory, wherein the central processing unit functions to;

obtain, via the network port, an information record regarding a virtual dispersed data storage container, wherein a plurality of slice servers stores a plurality of data slices within the virtual dispersed data storage container and wherein a data segment is encoded using an information dispersal algorithm to produce the plurality of data slices;

determine whether a list of virtual dispersed data storage containers of the slice server includes the virtual dispersed data storage container;

when the list does not include the virtual dispersed data storage container;

update the list to include the virtual dispersed data storage container; and

allocate a portion of the memory to the virtual dispersed data storage container.

8. The slice server of claim 7, wherein the obtaining the information record comprises:

querying a registry for one or more information records that identify the slice server, when the one or more information records includes the information record.

9. The slice server of claim 7, wherein the central processing unit is further operable to:

interpret the list;

when a second virtual dispersed data storage container is on the list and the slice server is not identified in the one or more information records, determine whether memory is allocated to the second virtual dispersed data storage container; and

when memory is allocated to the second virtual dispersed data storage container, unallocate the memory to the virtual dispersed data storage container.

10. The slice server of claim 7, wherein the central processing unit is further operable to:

obtain, via the network port, a second information record regarding a second virtual dispersed data storage container;

determine whether the list of virtual dispersed data storage containers of the slice server includes the second virtual dispersed data storage container;

when the list does not include the second virtual dispersed data storage container;

update the list to include the second virtual dispersed data storage container; and

allocate a second portion of the memory to the second virtual dispersed data storage container.

11. The slice server of claim 7, wherein the central processing unit is further operable to:

verify that the slice server is associated with the virtual dispersed data storage container by determining that the slice server is identified in a vault object of the information record.

12. The slice server of claim 7, wherein the central processing unit is further operable to:

determine whether the virtual dispersed data storage container has been deleted based on the information record; and

when the virtual dispersed data storage container has been deleted, un-allocate memory to the virtual dispersed data storage container.