Stream identifier based storage system for managing an array of SSDs

• US 10,459,661 B2
• Filed: 08/25/2017
• Issued: 10/29/2019
• Est. Priority Date: 08/29/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Shivanand, Srikanth Tumkur, Kodase, Sharath Kumar, Verma, Rajeev
• Primary Examiner(s): Tsui, Daniel D
• Assistant Examiner(s): Goldschmidt, Craig S
• Application Number:
  US15/687,167
• Publication Number:
  US 20180059988A1
• Time in Patent Office: 795 Days
• Field of Search: None
• CPC Class Codes: G06F 3/0604 Improving or facilitating administration, e.g. storage management
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0688 Non-volatile semiconductor memory arrays

Abstract

A storage system for managing an array of SSDs includes the array of SSDs and a host controller. Each of the SSDs is operable to store data. The host controller is configured to manage the array of SSDs as multiple logical volumes. Each of the logical volumes is associated with at least one stream ID. At least one of the SSDs and the host controller stores a system code configured to execute stream ID commands to access each of the logical volumes. Each of the logical volumes is dedicated to a memory region of each of the SSDs. Each of the logical volumes corresponding to the memory region of each of the SSDs are combined to form a logical volume group using the at least one stream ID. The host controller uses the stream ID commands to communicate with logical volumes of the logical volume group.

Claims

1. A storage system, comprising:

an array of solid-state drives (SSDs) that are each operable to store data; and

a host controller configured to manage the array of SSDs as a plurality of logical volumes, wherein each of the logical volumes is associated with at least one stream identifier (ID) and corresponds to dedicated portions of each of a plurality of the SSDs, and wherein at least one of the array of SSDs and the host controller stores a system code configured to execute stream ID commands to access each of the logical volumes.

2. The storage system of claim 1, wherein a different memory region of each of the SSDs is dedicated to each logical volume, wherein each logical volume does not overlap with another logical volume, and wherein all of the logical volumes are combined to form a logical volume group using the at least one stream ID.

3. The storage system of claim 2, wherein the host controller uses the stream ID commands to communicate with a logical volume of the logical volume group which is uniquely identified using the at least one stream ID.

4. The storage system of claim 1, wherein the stream ID command is one of a stream ID active command, a stream ID idle command, and a get stream ID status command.

5. The storage system of claim 4, wherein the stream ID idle command is associated with an operation type defining at least one of a power mode operation, a garbage collector operation, a data computation operation, and a custom operation.

6. The storage system of claim 1, wherein at least one of the SSDs and the host controller implements the system code and is configured to coexist with redundant array of independent disk (RAID) drivers loaded by an operating system.

7. The storage system of claim 1, wherein the host controller is further configured to:

receive a request to access a logical block addressing (LBA) of a logical volume from the plurality of logical volumes;

determine a stream ID corresponding to the logical volume;

detect a status of the stream ID corresponding to the logical volume from a non-volatile random-access memory (NVRAM), wherein the status is one of active and passive; and

cause to one of allow access to the LBA of at least one SSD from the plurality of SSDs corresponding to the stream ID of the logical volume when the status of the stream ID is detected as active, and perform a garbage collection function on at least one SSD from the plurality of SSDs corresponding to the stream ID of the logical volume when the status of the stream ID is detected as passive.

8. The storage system of claim 7, wherein the at least one SSD for the LBA is selected from a parity group based on an orchestration logic, wherein the parity group is determined based on the LBA.

9. The storage system of claim 7, wherein the garbage collection function on the at least one SSD from the plurality of SSDs is performed based on an orchestration sequence.

10. The storage system of claim 7, wherein the request is one of a read request, a write request, and a LBA compute request.

11. The storage system of claim 7, wherein the NVRAM is configured to buffer the request to access the LBA before sending the request to the logical volume corresponding to the stream ID.

12. The storage system of claim 11, wherein the host controller is configured to set the status of each of the stream IDs in the NVRAM based on the stream ID commands.

13. A host device, comprising:

a processor; and

a host controller, connected to the processor and an array of solid-state drives (SSDs), wherein the host controller is configured to;

manage the array of SSDs as a plurality of logical volumes, wherein each of the logical volumes is associated with at least one stream identifier (ID) and corresponds to dedicated portions of each of a plurality of the SSDs, and wherein the host controller stores a system code configured to execute stream ID commands to access each of the logical volumes.

14. The host device of 13, wherein the host controller is configured to:

receive a request to access a logical block addressing (LBA) of a logical volume from the plurality of logical volumes;

determine a stream ID corresponding to the logical volume;

detect a status of the stream ID corresponding to the logical volume from a non-volatile random-access memory (NVRAM), wherein the status is one of active and passive; and

cause to one of allow access to the LBA of at least one SSD from the plurality of SSDs corresponding to the stream ID of the logical volume when the status of the stream ID is detected as active, and perform a garbage collection function on at least one SSD from the plurality of SSDs corresponding to the stream ID of the logical volume when the status of the stream ID is detected as passive.

15. The host device of claim 14, wherein the at least one SSD for the LBA is selected from a parity group based on an orchestration logic, wherein the parity group is determined based on the LBA.

16. The host device of claim 14, wherein the garbage collection function on the at least one SSD from the plurality of SSDs is performed based on an orchestration sequence.

17. The host device of claim 14, wherein the request is one of a read request, a write request, and a LBA compute request.

18. The host device of claim 14, wherein the NVRAM is configured to buffer the request to access the LBA before sending to the logical volume corresponding to the stream ID.

19. A method for managing an array of SSDs, comprising:

receiving, by a host controller, a request to access a logical block addressing (LBA) of a logical volume from the array of SSDs, wherein the SSDs are dedicated to a plurality of logical volumes that each correspond to dedicated portions of each of a plurality of the SSDs;

determining by the host controller, a stream ID corresponding to the logical volume;

detecting by the host controller, a status of the stream ID corresponding to the logical volume, wherein the status is one of active and passive; and

causing, by the host controller, to one of allow access to the LBA of at least one SSD from a plurality of SSDs corresponding to the stream ID of the logical volume when the status of the stream ID is detected as active, and perform a garbage collection function on at least one SSD from the plurality of SSDs corresponding to the stream ID of the logical volume when the status of the stream ID is detected as passive.

20. The method of claim 19, wherein the host controller detects the status of the stream ID corresponding to the logical volume from a non-volatile random-access memory (NVRAM), wherein the NVRAM is configured to buffer the request to access the LBA before sending to the logical volume corresponding to the stream ID.