Coordinated persistent memory data mirroring

Patent metadata

Field	Value
Publication number	US-12112054-B2
Application number	US-202217985364-A
Country	US
Kind code	B2
Filing date	Nov 11, 2022
Priority date	Nov 11, 2022
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

Disclosed is a method for preforming the data mirror comprising: receiving from an application executing on a computing device a request to write data to a first local persistence memory of the computing device; issuing an async write operation to mirror the write request to write a same data to a second local persistence memory of the computing device by using a supplemental device; performing a write operation to write the data to the first local persistence memory by using a central processing unit (CPU) from the processing resource of the computing device; in response to determining that the write operation is completed and the async write operation is completed, determining a status check result indicating if the async write operation is successful; and sending the status check result to the application.

First claim

What is claimed is:

1. A computer-implemented method, comprising:
receiving, by at least one processor of a processing resource, from an application executing on a computing device a request to write data to a first local persistence memory of the computing device;
issuing, by the at least one processor, an async write operation to mirror the write request to write a same data to a second local persistence memory of the computing device by using a supplemental device;
performing, by the at least one processor, a write operation to write the data to the first local persistence memory by using a central processing unit (CPU) from the processing resource of the computing device;
in response to determining that the write operation is completed and the async write operation is completed, determining, by the at least one processor, a status check result indicating if the async write operation is successful; and
sending, by the at least one processor, the status check result to the application.

2. The method of claim 1 , wherein the supplemental device is different from the CPU to reduce a workload from the CPU.

3. The method of claim 1 , wherein the supplemental device is a remote direct memory access (RDMA) network interface card.

4. The method of claim 1 , wherein the supplemental device is a Data Streaming Accelerator (DSA) engine inside a processor.

5. The method of claim 1 , wherein the supplemental device includes a virtual device of a runtime library.

6. The method of claim 1 , wherein the determining the status check result further comprises:
determining whether the copied data through the async write operation is successful, wherein when the copied data through the async operation meets an error threshold, the copied data through the async write operation is successful; and
in response to determining the copied data through the async write operation is not successful, sending the error status check result to the application; and
issuing a second async write operation to mirror the write request to write the same data to the second local persistence memory of the computing device by using the supplemental device.

7. The method of claim 1 , wherein the write operation and the async write operation started substantially at the same time.

8. The method of claim 1 , wherein the async write operation takes longer than the write operation.

9. A non-transitory machine-readable medium having instructions stored therein, which when executed by a processor, cause the processor to perform:
receiving from an application executing on a computing device a request to write data to a first local persistence memory of the computing device;
issuing an async write operation to mirror the write request to write a same data to a second local persistence memory of the computing device by using a supplemental device;
performing a write operation to write the data to the first local persistence memory by using a central processing unit (CPU) from the processing resource of the computing device;
in response to determining that the write operation is completed and the async write operation is completed, determining a status check result indicating if the async write operation is successful; and
sending the status check result to the application.

10. The non-transitory machine-readable medium of claim 9 , wherein the supplemental device is different from the CPU to reduce a workload from the CPU.

11. The non-transitory machine-readable medium of claim 9 , wherein the supplemental device is a remote direct memory access (RDMA) network interface card.

12. The non-transitory machine-readable medium of claim 9 , wherein the supplemental device is a Data Streaming Accelerator (DSA) engine inside a processor.

13. The non-transitory machine-readable medium of claim 9 , wherein the supplemental device includes a virtual device of a runtime library.

14. The non-transitory machine-readable medium of claim 9 , wherein the determining the status check result further comprises:
determining whether the copied data through the async write operation is successful, wherein when the copied data through the async operation meets an error threshold, the copied data through the async write operation is successful; and
in response to determining the copied data through the async write operation is not successful, sending the error status check result to the application; and
issuing a second async write operation to mirror the write request to write the same data to the second local persistence memory of the computing device by using the supplemental device.

15. The non-transitory machine-readable medium of claim 9 , wherein the write operation and the async write operation started substantially at the same time.

16. The non-transitory machine-readable medium of claim 9 , wherein the async write operation takes longer than the write operation.

17. A system, comprising:
a processor; and
a memory coupled to the processor to store instructions, which when executed by the processor, cause the processor to perform:
receiving from an application executing on a computing device a request to write data to a first local persistence memory of the computing device;
issuing an async write operation to mirror the write request to write a same data to a second local persistence memory of the computing device by using a supplemental device;
performing a write operation to write the data to the first local persistence memory by using a central processing unit (CPU) from the processing resource of the computing device;
in response to determining that the write operation is completed and the async write operation is completed, determining a status check result indicating if the async write operation is successful; and
sending the status check result to the application.

18. The system of claim 17 , wherein the supplemental device is different from the CPU to reduce a workload from the CPU.

19. The system of claim 17 , wherein the supplemental device is a remote direct memory access (RDMA) network interface card.

20. The system of claim 17 , wherein the supplemental device is a Data Streaming Accelerator (DSA) engine inside a processor.

Assignees

• Dell Products Lp

Inventors

• Chen Tao
• Gong Shuguang
• Zou Yong

Classifications

• G06F3/0653

  Monitoring storage devices or systems · CPC title

• G06F3/0619

  in relation to data integrity, e.g. data losses, bit errors · CPC title

• G06F3/067

  Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS] · CPC title

• G06F3/065 Primary

  Replication mechanisms · CPC title

• G06F3/061 Primary

  Improving I/O performance · CPC title