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- Yes, support for Hyper-V CSVs is being planned for the NVMe/TCP initiator. We will share more details on supported functionality as they're available. I'd like to learn more about your specific use case, I'll reach out to you directly. Thanks!
as I understood Dan, this is planned with the NVME over Fabric https://youtu.be/e8E-_lk_y84?t=366
this is only necessary for (shared) SAN, Storage Spaces (local storage) / Storage Spaces Direct (local shared storage HCI) support NVMe already with extreme performance, even improving with Windows Server 2025 new NVMe drivers and further optimizations as displayed the linked snipped.- Within the session, it mentions NVMe over Fabrics (NVMe-oF), which I believe typically refers to RDMA (TCP/ROCE vs UDP/iWARP). However, NVMe over TCP is relatively new, and I've heard that some other platforms also support it. It would be great if you could elaborate on this.
Hear you Cem. But RDMA is something planned for Microsoft NVMe over Fabric, as stated in the video snipped linked above. NVMe-OF with or without RDMA (cherry on top when ready) it will leverage TCP. Whether it will use UDP (IWARP) at all wasn't said. I personally doubt it due to the constraints of NIC hardware still supporting iWARP today. Mind UDP is not generally faster than TCP. Speaking about S2D Microsoft currently favours RoCEv2 with Mellanox Cx5/Cx6 being one of the best NICs available (from my experience).
