[PaulHoule]

See https://www.snia.org/educational-library/key-value-standardi... for some description of the special command set to get an nvme drive to natively work as a key-value store.

Also https://www.snia.org/sites/default/files/ESF/Key-Value-Stora...

[laurencerowe]

How do you tell which NVMe drive models support the KV API? Is this something that you can experiment with on a consumer drive or do you need specific enterprise ssd models?

Samsung's uNVMe evaluation guide (from 2019) device support section just states:

    Guide Version: uNVMe2.0 SDK Evaluation Guide ver 1.2
    Supported Product(s): NVMe SSD (Block/KV)
    Interface(s): NVMe 1.2

https://github.com/OpenMPDK/uNVMe/blob/master/doc/uNVMe2.0_S...

I can't find detailed spec sheets detailing which NVMe command sets are supported even for their enterprise drives.

[laurencerowe]

I reached out to Samsung support to ask. After being sent from one department to another and receiving some very clearly incorrect advice from their sales support they eventually sent me to an online form for the memory department. Am still waiting for a response a week later.

[aftbit]

Interesting, never heard of this before! Do you have any other resources to share? How can I play with this today?

[mycall]

How is that implemented? Btree, hashtable?

[anticensor]

Implementation-defined. The API resembles a map access, though.