[delfinom]

https://github.com/OpenMPDK/KVRocks

Given however, that most of the world has shifted to VMs, I don't think KV storage is accessible for that reason alone because the disks are often split out to multiple users. So the overall demand for this would be low.

[londons_explore]

NVME's allow namespaces to be made - effectively letting multiple users all share an NVME device without interfering with each other.

[moondev]

A note for those unaware, consumer grade NVME devices (basically all m.2 formfactor drives from my experience) only support a single namespace. If you want to explore creating multiple namespaces you will need an enterprise grade u.2 drive.

Some u.2 drives even support thin provisioning, like how a hypervisor treats a sparse disk file but for physical hardware.