RDMA over Commodity Ethernet at Scale

  title={RDMA over Commodity Ethernet at Scale},
  author={Chuanxiong Guo and Haitao Wu and Zhong Deng and Gaurav Soni and Jianxi Ye and Jitendra Padhye and Marina Lipshteyn},
Over the past one and half years, we have been using RDMA over commodity Ethernet (RoCEv2) to support some of Microsoft's highly-reliable, latency-sensitive services. This paper describes the challenges we encountered during the process and the solutions we devised to address them. In order to scale RoCEv2 beyond VLAN, we have designed a DSCP-based priority flow-control (PFC) mechanism to ensure large-scale deployment. We have addressed the safety challenges brought by PFC-induced deadlock (yes… CONTINUE READING
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