This article explains the fundamentals of Remote Direct Memory Access (RDMA), its low‑latency, zero‑copy architecture, core principles, programming interfaces, and how it transforms data‑center networking, high‑performance computing, and distributed storage by bypassing the CPU and kernel.
The talk examines the challenges of using standard Linux TCP for high‑performance data‑center workloads, explores how RDMA can provide zero‑copy and asynchronous kernel bypass, and presents experimental results from an FPGA‑based prototype that approaches 800 Gbps packet rates while highlighting congestion‑control and CPU‑utilization trade‑offs.
This article explains how high‑frequency trading firms achieve ultra‑low network latency by combining proximity deployment, dedicated links, microwave transmission, InfiniBand, low‑latency switches, kernel bypass, RDMA, TCP offload engines and FPGA acceleration, and summarizes the impact of each technique on overall request latency.
This article explains the concepts of Direct Memory Access (DMA) and Remote Direct Memory Access (RDMA), compares traditional data transfer with DMA-enabled paths, outlines RDMA's advantages such as zero-copy and kernel bypass, and reviews the main RDMA protocols, standards bodies, and hardware ecosystem.
The article describes the motivation, architecture, FullNat forwarding process, high‑availability mechanisms, and performance‑optimizing techniques of TVS, a custom four‑layer load‑balancing platform built to overcome LVS limitations and meet the company’s demanding traffic and reliability requirements.
