Event details

Explore storage features in Windows Server 2025. We'll showcase exciting new capabilities in the ReFS file system, software-defined storage with Storage Spaces, innovation in Storage-spaces Direct (S...
Char_Cheesman
Updated Dec 27, 2024
Karl-WE's avatar
Karl-WE
MVP
Mar 26, 2024

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.

ciscen's avatar
ciscen
Copper Contributor
Mar 26, 2024
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.
  • Karl-WE's avatar
    Karl-WE
    MVP
    Mar 26, 2024

    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).