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高性能算力中心 — RoCE — Overview
2022-06-26 03:33:00 【范桂飓】
目录
RoCE
RDMA 最早在 Infiniband 传输网络上实现,技术先进,但是价格高昂,后来业界厂家把 RDMA 移植到 Ethernet 上,降低了 RDMA 的使用成本,推动了 RDMA 技术普及。在 Ethernet 上,根据协议栈融合度的差异,分为 iWARP 和 RoCE 两种技术。

在 2010 年发布的 RoCE(Remote Direct Memory Access over Converged Ethernet,RDMA over Converged Ethernet,基于融合以太的远程内存直接访问协议)是一个通过以太网进行 RDMA 传输的网络协议,使得可以在标准以太网基础架构(交换机)上使用 RDMA。
RoCE 协议具有 RoCEv1 和 RoCEv2 两个版本,这取决于所使用的网络适配器/网卡类型。
RoCEv1:是基于以太网链路层实现的 RDMA 协议,在以太层的 typeID 是 0x8915。RoCEv1 网络中的交换机需要支持 PFC/DCB 等流控技术,要求网卡支持 RoCEv1 协议,以此在物理层保证
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