Dispersed storage processing unit and methods with operating system diversity for use in a dispersed storage system

• US 9,690,513 B2
• Filed: 03/30/2010
• Issued: 06/27/2017
• Est. Priority Date: 08/27/2009
• Status: Expired due to Fees

• Current Assignee: Pure Storage, Inc.
• Original Assignee: International Business Machines Corporation
• Inventors: Resch, Jason K.
• Primary Examiner(s): Mobin, Hasanul
• Application Number:
  US12/749,606
• Publication Number:
  US 20110055273A1
• Time in Patent Office: 2,646 Days
• Field of Search: None
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0622 in relation to access
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0643 Management of files
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

A plurality of data slices are generated from a block of data to be stored in the dispersed storage system. A plurality of dispersed storage units are determined for storing the plurality of data slices, based on an operating system associated with the plurality of dispersed storage units.

Claims

1. A method for use in a dispersed storage system, the method comprising:

dispersed storage error encoding a block of data to produce a plurality of encoded data slices, wherein the plurality of encoded data slices includes a total number of encoded data slices and wherein a decode threshold number of encoded data slices, less than the total number of encoded data slices of the plurality of encoded data slices, are needed to recover the block of data;

determining a desired level of security of the block of data to provide protection from potential security threats, the level of security increasing based on increasing operating system diversity over a plurality of dispersed storage units;

determining an indication of a security level associated with each of a first operating system and a second operating system used by respective storage units of the plurality of dispersed storage units, wherein the first operating system is different than the second operating system;

determining the plurality of dispersed storage units for storing the plurality of encoded data slices based on the desired level of security of the block of data, wherein a first subset of the plurality of dispersed storage units uses the first operating system and a second subset of the plurality of dispersed storage units uses the second operating system, wherein a number of dispersed storage units in each of the first and second subsets is less than the decode threshold number, and wherein the indication of a security level associated with each of the first operating system and the second operating system compare favorably with the desired level of security of the block of data; and

sending write requests to the plurality of dispersed storage units to store the plurality of encoded data slices, wherein each of the first and second subsets of the plurality of dispersed storage units stores less than the decode threshold number of encoded data slices.

2. The method of claim 1 further comprising:

storing an indication of the operating system employed by each of the plurality of dispersed storage units.

3. The method of claim 1 further comprises:

sending the write requests to the plurality of dispersed storage units such that each dispersed storage units stores one encoded data slice of the plurality of encoded data slices.

4. The method of claim 1, wherein the determining the plurality of dispersed storage units comprises:

identifying a third subset of the plurality of dispersed storage units that uses a third operating system.

5. The method of claim 1 further comprises:

generating the write requests such that each of the first and the second subsets of the plurality of dispersed storage units stores less than the decode threshold number of encoded data slices.

6. A dispersed storage processing unit for use in a dispersed storage system, the dispersed storage processing unit comprising:

a grid module for dispersed storage error encoding a block of data to produce a plurality of encoded data slices, wherein the plurality of encoded data slices includes a total number of encoded data slices and wherein a decode threshold number of encoded data slices, less than the total number of encoded data slices of the plurality of encoded data slices, are needed to recover the block of data;

a storage module, coupled to the grid module, for;

determining a desired level of security of the block of data to provide protection from potential security threats, the level of security increasing based on increasing operating system diversity over a plurality of dispersed storage units;

determining an indication of a security level associated with each of a first operating system and a second operating system used by respective storage units of the plurality of dispersed storage units, wherein the first operating system is different than the second operating system;

determining the plurality of dispersed storage units for storing the plurality of encoded data slices based on the desired level of security of the block of data, wherein a first subset of the plurality of dispersed storage units uses the first operating system and a second subset of the plurality of dispersed storage units uses the second operating system, wherein a number of dispersed storage units in each of the first and second subsets is less than the decode threshold number, and wherein the indication of a security level associated with each of the first operating system and the second operating system compare favorably with the desired level of security of the block of data; and

sending write requests to the plurality of dispersed storage units to store the plurality of encoded data slices, wherein each of the first and second subsets of the plurality of dispersed storage units stores less than the decode threshold number of encoded data slices.

7. The dispersed storage processing unit of claim 6 further comprising:

a memory, coupled to the storage module, configured to store an indication of the operating system employed by each of the plurality of dispersed storage units.

8. The dispersed storage processing unit of claim 6, wherein the storage module is further operable to:

send the write requests to the plurality of dispersed storage units such that each dispersed storage units stores one encoded data slice of the plurality of encoded data slices.

9. The dispersed storage processing unit of claim 6, wherein the storage module further determines the plurality of dispersed storage units by:

identifying a third subset of the plurality of dispersed storage units that uses a third operating system.

10. The dispersed storage processing unit of claim 6, wherein the storage module is further operable to:

generate the write requests such that each of the first and the second subsets of the plurality of dispersed storage units stores less than the decode threshold number of encoded data slices.