METHOD OF MANAGING THROUGHPUT OF REDUNDANT ARRAY OF INDEPENDENT DISKS (RAID) GROUPS IN A SOLID STATE DISK ARRAY

• US 20150212755A1
• Filed: 01/30/2014
• Published: 07/30/2015
• Est. Priority Date: 01/30/2014
• Status: Abandoned Application

• Current Assignee: Avalanche Technology Incorporated
• Original Assignee: Avalanche Technology Incorporated
• Inventors: Asnaashari, Mehdi
• Application Number:
  US14/168,642
• Publication Number:
  US 20150212755A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0629 Configuration or reconfiguration of storage systems
• CPC Class Codes: G06F 3/0688 Non-volatile semiconductor memory arrays

Abstract

A method of writing to one or more solid state disks (SSDs) employed by a storage processor includes receiving a command, creating sub-commands from the command based on a granularity, and assigning the sub-commands to the one or more SSDs and creating a NVMe command structure for each sub-command.

Claims

1. A method of managing throughput of redundant array of independent disk (RAID) groups in a storage system, the method comprising:

determining the number of RAID groups located within the storage system of one or more of the RAID groups, a RAID group comprising multiple disks that appear to be a single device to a user, each disk having associated therewith a configurable plurality of PCIe lanes;

calculating throughput requirements for each RAID group based on the determined number of RAID groups;

configuring each of the RAID groups to meet the calculated throughput requirements;

configuring the one or more RAID groups based on the determined number of one or more RAID groups;

adding one or more RAID groups to the storage system; and

upon adding one or more RAID groups, re-configuring the PCIe lanes of at least one of the disks of the currently-employed one or more RAID groups.

2. The method of managing throughput, as recited in claim 1, wherein the disks are SSDs and wherein the calculating step includes determining PCIe generation and number of PCIe lanes for each SSD.

3. The method of managing throughput, as recited in claim 1, wherein the disks are SSDs and wherein the configuring step is configuring the SSDs.

4. The method of managing throughput, as recited in claim 3, wherein the configuring step further includes initializing the SSDs.

5. The method of managing throughput, as recited in claim 4, wherein the initializing step further includes initiating a link training.

6. The method of managing throughput, as recited in claim 1, wherein the storage system further includes one or more switches and wherein the configuring step includes configuring the one or more switches.

7. The method of managing throughput, as recited in claim 6, wherein the disks are SSDs and wherein the configuring step further includes initializing the SSDs.

8. The method of managing throughput, as recited in claim 7, wherein the initializing step further includes initiating a link training.

9. The method of managing throughput, as recited in claim 1, wherein the determining the throughput step is based on throughput requirements of the storage system.

11. The method of managing throughput, as recited in claim 1, wherein the configuring step determines a number of PCIe lanes supported by the one or more RAID groups and based on the determining the number of PCIe lanes, changes the number of PCIe lanes of the disks of the one or more RAID groups.

12. The method of managing throughput, as recited in claim 11, wherein the configuring step further includes determining a PCIe generation of the disks of the one or more RAID groups and based upon the determining the PCIe generation, changing the PCIe generation of the one or more RAID groups.

13. The method of managing throughput, as recited in claim 1, wherein the disks are SSDs, and further wherein the configuring step includes determining a PCIe generation of the SSDs of the one or more RAID groups and based upon the determining the PCIe generation, changing the PCIe generation of the one or more RAID groups.

15. The method of managing throughput, as recited claim 1, wherein upon adding at least one other RAID group to the one or more RAID groups, re-determining the number of RAID groups in the storage system.

16. The method of managing throughput, as recited claim 15, further including re-calculating throughput requirements for each RAID group of the one or more RAID groups based on the re-determined number of RAID groups.

17. The method of managing throughput, as recited claim 16, further including re-configuring each of the RAID groups to meet the calculated throughput requirements.

18. The method of managing throughput, as recited in claim 1, wherein the calculating step further includes measuring the temperature of the one or more RAID groups.

19. The method of managing throughput, as recited in claim 18, wherein the storage system includes temperature sensors and the method of managing further includes periodically reading the temperature sensors by the storage processor.

20. The method of managing throughput, as recited in claim 18, wherein the storage processor re-configures the one or more RAID groups based on the measured temperature.

21. The method of managing throughput, as recited in claim 20, wherein the one or more RAID groups include SSDs and wherein the SSDs include temperature sensors and the method of managing throughput further includes periodically reading the temperature sensors by the storage processor.

22. The method of managing throughput, as recited in claim 21, further including the storage processor re-configuring the SSDs of the one or more RAID groups based on the read temperature.

23. The method of managing throughput, as recited in claim 22, wherein the one or more RAID groups operate at or below a threshold temperature, and the re-configuring further includes lowering the throughput of the one or more RAID groups operating at a temperature above their respective threshold temperature.

24. The method of managing throughput, as recited in claim 21, wherein the one or more RAID groups operate at or below a threshold temperature and further wherein the method of managing throughput further includes the utilizing the one or more RAID groups being operated at a temperature above their respective threshold less often in the future.

25. The method of managing throughput, as recited in claim 21, wherein the one or more RAID groups operate at or below a threshold temperature and further wherein the storage processor utilizes the one or more RAID groups operating at a temperature above their respective threshold temperature only for read operations.

31. The method of managing throughput, as recited in claim 1, further including maintaining configuration information of characteristics of the RAID groups in a memory.

32. The method of managing throughput, as recited in claim 31, wherein the configuration information includes a generation type of the RAID groups, a rate at which the RAID groups are capable of operating, or Peripheral Component Interconnect Express (PCIe) lanes each RAID group is capable of supporting, the rate at which each RAID group is currently operating, the current generation of each RAID group, or the PCIe lanes currently being used by each RAID group.

34. The method of managing throughput, as recited in claim 1, wherein the re-configuring the PCIe lanes includes reducing the number of PCIe lanes.

10. (canceled)

14. (canceled)

26. (canceled)

27. (canceled)

28. A method of configuring redundant array of independent disk (RAID) groups in a storage system, the method comprising:

determining the number of the one or more RAID groups located within a storage system and currently being employed by the storage system, each of the one or more RAID groups comprising multiple disks appearing to be a single device to a user, each disk having associated therewith a configurable plurality of PCIe lanes;

operating the one or more RAID groups based on the determined number of one or more RAID groups,

wherein the number of the one or more RAID groups being less than the number of RAID groups the storage system is capable of employing while maximizing throughput of the storage system;

configuring the one or more RAID groups based on the determined number of one or more RAID groups;

adding one or more RAID groups to the storage system; and

upon adding one or more RAID groups, re-configuring the PCIe lanes of at least one of the disks of the currently-employed one or more RAID groups.

29. The method of configuring, as recited in claim 28, further including configuring the one or more RAID groups based on the determined number of one or more RAID groups.

33. The method of configuring, as recited in claim 28, wherein the re-configuring the PCIe lanes includes reducing the number of PCIe lanes.

30. (canceled)