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Datacenter Ethernet and RDMA: Issues at Hyperscale

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arxiv 2302.03337 v2 pith:ZIVN4GYP submitted 2023-02-07 cs.NI cs.ARcs.DC

Torsten Hoefler , Duncan Roweth , Keith Underwood , Bob Alverson , Mark Griswold , Vahid Tabatabaee , Mohan Kalkunte , Surendra Anubolu
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Siyuan Shen Abdul Kabbani Moray McLaren Steve Scott
This is my paper · ORCID
classification cs.NIcs.ARcs.DC
keywords datacenterethernethigh-performancerdmaroceadoptcomputingdecade
verification ladder T0 review T1 audit T2 compute T3 formal
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We observe that emerging artificial intelligence, high-performance computing, and storage workloads pose new challenges for large-scale datacenter networking. RDMA over Converged Ethernet (RoCE) was an attempt to adopt modern Remote Direct Memory Access (RDMA) features into existing Ethernet installations. Now, a decade later, we revisit RoCE's design points and conclude that several of its shortcomings must be addressed to fulfill the demands of hyperscale datacenters. We predict that both the datacenter and high-performance computing markets will converge and adopt modernized Ethernet-based high-performance networking solutions that will replace TCP and RoCE within a decade.

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