Storage device with mandatory atomic-only access

Patent metadata

Field	Value
Publication number	US-10817221-B2
Application number	US-201916274101-A
Country	US
Kind code	B2
Filing date	Feb 12, 2019
Priority date	Feb 12, 2019
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

For preventing implementation errors due to misconfigured host applications, a storage controller provisions a storage destination with a capability identifier configured to indicate that the storage destination mandates atomic write operations. The storage controller also receives a write request for the storage destination from host application, and rejects, in response to the received request including a non-atomic write operation, the non-atomic write request.

First claim

What is claimed is:

1. An apparatus comprising:
one or more processors;
one or more non-transitory computer-readable storage media, the one or more non-transitory computer readable storage media comprising executable code, that when executed by the one or more processors, causes the one or more processors to:
provision a storage destination with a capability identifier configured to indicate that the storage destination mandates atomic write operations;
receive a write request for the storage destination from host application; and
reject, in response to the received request including a non-atomic write operation, the non-atomic write request without executing the received request.

2. The apparatus of claim 1 , where the executable code further causes the one or more processors to, in response to the received request including a non-atomic write operation, issue a write-failure message to the host application.

3. The apparatus of claim 1 , where the capability identifier is further configured to indicate that the storage destination does not mandate atomic write operations.

4. The apparatus of claim 1 , where the capability identifier is further configured to indicate that only a portion of the storage destination mandates atomic-only write operations.

5. The apparatus of claim 1 , where the executable code further causes the one or more processors to determine if the received write request includes an atomic write operation.

6. The apparatus of claim 1 , where the executable code further causes the one or more processors to determine if the received write request includes a partial atomic write operation.

7. The apparatus of claim 1 , where the capability identifier comprises a value stored in a configuration area of the storage destination.

8. The apparatus of claim 1 , where the storage destination comprises a storage device.

9. The apparatus of claim 1 , where the storage destination comprises a storage volume.

10. A method comprising:
provisioning a storage destination with a capability identifier configured to indicate that the storage destination mandates atomic write operations;
receiving a write request for the storage destination from host application; and
rejecting, in response to the received request including a non-atomic write operation, the non-atomic write request without executing the received request.

11. The method of claim 10 , where the method further comprises issuing, in response to the received write request including a non-atomic write operation, a write-failure message to the host application.

12. The method of claim 10 , where the capability identifier is further configured to indicate that the storage destination does not mandate atomic write operations.

13. The method of claim 10 , where the capability identifier is further configured to indicate that only a portion of the storage destination mandates atomic-only write operations.

14. The method of claim 10 , where the method further comprises determining if the received write request includes a partial atomic write operation.

15. The method of claim 10 , where the capability identifier comprises a value stored in a configuration area of the storage destination.

16. The method of claim 10 , where the storage destination comprises a storage device.

17. The method of claim 10 , where the storage destination comprises a storage volume.

18. A computer program product, the computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions readable/executable by a processor to cause the processor to:
provision a storage destination with a capability identifier configured to indicate that the storage destination mandates atomic write operations;
receive a write request for the storage destination from host application; and
reject, in response to the received request including a non-atomic write operation, the non-atomic write request without executing the received request.

19. The computer program product of claim 18 , where the program instructions cause the processor to, in response to the received request including a non-atomic write operation, issue a write-failure message to the host application.

20. The computer program product of claim 18 , where the capability identifier is further configured to indicate that the storage destination does not mandate atomic write operations.

Assignees

• IBM

Inventors

• Elharrar Yair
• Messing Deborah A
• Mayraz Matosevich Rivka

Classifications

• G06F3/0659 Primary

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0673

  Single storage device · CPC title

• G06F3/0631

  by allocating resources to storage systems · CPC title

• G06F3/0619

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

• G06F3/067 Primary

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