Why it matters

RoCE competes with InfiniBand. AWS EFA + hyperscaler adoption growing.

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The architecture

RDMA over Ethernet.

Congestion control (DCQCN).

Approaching IB perf.

RoCE deep diveRDMAover EthernetCongestion controlDCQCN, ECNAWS EFAsimilar approachRoCE v2 + DCQCN + priority flow control; approaches InfiniBand at scale
RoCE deep dive.
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How it works end to end

RoCE v2.

DCQCN congestion.

AWS EFA.