INTRA-RACK AND INTER-RACK ERASURE CODE DISTRIBUTION

• US 20170068475A1
• Filed: 11/17/2016
• Published: 03/09/2017
• Est. Priority Date: 12/24/2014
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Harnik, Danny, FACTOR, MICHAEL, SOTNIKOV, DMITRY, TA-SHMA, PAULA, Kull, Lukas, Morf, Thomas
• Application Number:
  US15/353,772
• Publication Number:
  US 20170068475A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1088 Reconstruction on already foreseen single or plurality of spare disks
• CPC Class Codes: G06F 11/1092 Rebuilding, e.g. when physically replacing a failing disk
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: H03M 13/154 Error and erasure correction, e.g. by using the error and erasure locator or Forney polynomial

Abstract

Methods, computing systems and computer program products implement embodiments of the present invention that include detecting multiple sets of storage objects stored in a data facility including multiple server racks, each of the server racks including a plurality of server computers, each of the storage objects in each set being stored in a separate one of the server racks and including one or more data objects and one or more protection objects. A specified number of the storage objects are identified in a given server rack, each of the identified storage objects being stored in a separate one of the server computers, and one or more server computers in the given server rack not storing any of the identified storage objects are identified. Finally, in the identified one or more server computers, an additional protection object is created and managed for the identified storage objects.

Claims

1. A method, comprising:

detecting, by a management processor, multiple sets of storage objects stored in a data facility comprising multiple server racks, each of the server racks comprising a plurality of server computers, each of the storage objects in each given set being stored in separate server racks and comprising one or more data objects and one or more protection objects for the given set;

identifying, by the management processor, in a given server rack, a specified number of the storage objects, each of the identified storage objects being stored in separate server computers;

identifying by the management processor, one or more server computers in the given server rack not storing any of the identified storage objects; and

creating and managing, by the management processor, in the identified one or more server computers, an additional protection object for the identified storage objects,

wherein the multiple server racks are coupled via one or more first network switches having one or more respective first bandwidths, and wherein each of the server computers in a given server rack are coupled via a second network switch having a second bandwidth, and wherein the second bandwidth is greater than each of the one or more first bandwidths, and wherein the second bandwidth is more plentiful than the first bandwidth.

2. The method according to claim 1, wherein the additional protection object comprises a replicated storage object.

4. The method according to claim 1, wherein the corresponding contents of a given identified data object comprises user data.

5. The method according to claim 1, wherein the erasure correction codes comprise first erasure correction codes, and wherein the corresponding contents of a given identified protection object comprises second erasure correction codes.

7. The method according to claim 1, wherein each of the one or more first communication switches are selected from a list consisting of a data center switch and an aggregation switch, and wherein the second communication switch comprises a top-of-rack switch.

3. (canceled)

6. (canceled)

8. A storage facility, comprising:

multiple server racks, each of the server racks comprising a plurality of server computers; and

a processor configured;

to detect multiple sets of storage objects, each of the storage objects in each given set being stored in separate server racks and comprising one or more data objects and one or more protection objects for the given set,

to identify, in a given server rack, a specified number of the storage objects, each of the identified storage objects being stored separate server computers,

to identify one or more server computers in the given server rack not storing any of the identified storage objects, and

to create and manage, in the identified one or more server computers, an additional protection object for the identified storage objects,

wherein the multiple server racks are coupled via one or more first network switches having one or more respective first bandwidths, and wherein each of the server computers in a given server rack are coupled via a second network switch having a second bandwidth, and wherein the second bandwidth is greater than each of the one or more first bandwidths, and wherein the second bandwidth is more plentiful than the first bandwidth.

9. The storage facility according to claim 8, wherein the additional protection object comprises a replicated storage object.

11. The storage facility according to claim 8, wherein the corresponding contents of a given identified data object comprises user data.

12. The storage facility according to claim 8, wherein the erasure correction codes comprise first erasure correction codes, and wherein the corresponding contents of a given identified protection object comprises second erasure correction codes.

14. The storage facility according to claim 8, wherein each of the one or more first communication switches are selected from a list consisting of a data center switch and an aggregation switch, and wherein the second communication switch comprises a top-of-rack switch.

10. (canceled)

13. (canceled)

15. A computer program product, the computer program product comprising:

a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising;

computer readable program code configured to detect multiple sets of storage objects stored in a data facility comprising multiple server racks, each of the server racks comprising a plurality of server computers, each of the storage objects in each given set being stored in separate server racks and comprising one or more data objects and one or more protection objects for the given set;

computer readable program code configured to identify, in a given server rack, a specified number of the storage objects, each of the identified storage objects being stored in separate server computers;

computer readable program code configured to identify one or more server computers in the given server rack not storing any of the identified storage objects; and

computer readable program code configured to create and manage, in the identified one or more server computers, an additional protection object for the identified storage objects,

wherein the multiple server racks are coupled via one or more first network switches having one or more respective first bandwidths, and wherein each of the server computers in a given server rack are coupled via a second network switch having a second bandwidth, and wherein the second bandwidth is greater than each of the one or more first bandwidths, and wherein the second bandwidth is more plentiful than the first bandwidth, and wherein each of the one or more first communication switches are selected from a list consisting of a data center switch and an aggregation switch, and wherein the second communication switch comprises a top-of-rack switch.

16. The computer program product according to claim 15, wherein the additional protection object comprises a replicated storage object.

18. The computer program product according to claim 15, wherein the corresponding contents of a given identified data object comprises user data.

19. The computer program product according to claim 15, wherein the erasure correction codes comprise first erasure correction codes, and wherein the corresponding contents of a given identified protection object comprises second erasure correction codes.

17. (canceled)

20. (canceled)