RDMA · Remote Direct Memory Access
Network transfers that move data directly between machines' memory, bypassing the CPU for low latency.
Current numbers
>5xCXL KV-pool speedup vs SSD-based caching; ~3.8x vs 200G RDMA; up to 87% less GPU memory used
June 2025Ultra Ethernet Consortium UEC Specification 1.0 released (UET transport, packet spray, UCCM, packet trimming, native RDMA)
Jun 11 2025UEC 1.0 published — packet spray at switch, reorder at NIC, UET transport, packet trimming, native RDMA (560+ pp spec)