  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.
