[mgerdts]

In addition to my other comments about parallel IO and unbuffered IO, be aware that WS2022 has (had?) a rather slow NVMe driver. It has been improved in WS2025.

[jiggawatts]

I just benchmarked this to death using a 24-core VM with two different kinds of NVMe storage.

Windows Server 2025 is somewhat better on reads but only at low parallelism.

There’s no difference on writes.

[mgerdts]

I just stumbled across this:

> Native NVMe is now generally available (GA) with an opt-in model (disabled by default as of October’s latest cumulative update for WS2025).

https://www.elevenforum.com/t/announcing-native-nvme-in-wind...