起源，intel网卡中的SFP+是啥？
SFP+是光纤模块，是一种可热插拔的，独立于通信协议的光学收发器。SFP+光纤模块是SFP的升级。SFP+光纤模块在以太网和1G、2G、4G光纤通道上SFP已经得到了广泛应用。SFP+为了适应更高的数据速率，设计了比SFP增强的电磁屏蔽与信号保护特性。
intel 800系列开始支持RoCE协议。通过lspci | grep Eth查看网卡型号。所以一般使用RDMA的都选择迈络思IB网卡，示例也都以迈络思和soft-rdma（和soft raid或lvm类似）为例。iWARP (Internet Wide-area RDMA Protocol) is a network protocol that implements Remote Direct Memory Access (RDMA) over IP networks.
RoCE v2 (RDMA over Converged Ethernet version 2) is a network protocol that implements Remote Direct Memory Access (RDMA) over an Ethernet network.
RDMA is a host-offload, host-bypass technology that enables a low-latency, high-throughput direct memory-to-memory data communication between applications over a network.
These Intel® Ethernet Adapters support iWARP:
- Intel® Ethernet Network Adapter X722-DA2
- Intel® Ethernet Network Adapter X722-DA4
These Intel® Ethernet Adapters support both iWARP and RoCE v2:
- Intel® Ethernet Network Adapter E810-CQDA1 for OCP 3.0
- Intel® Ethernet Network Adapter E810-CQDA2 for OCP 3.0
- Intel® Ethernet Network Adapter E810-CQDA2
- Intel® Ethernet Network Adapter E810-CQDA1
- Intel® Ethernet Network Adapter E810-CQDA1 for OCP
- Intel® Ethernet Network Adapter E810-2CQDA2
- Intel® Ethernet Network Adapter E810-XXVDA2 for OCP 3.0
- Intel® Ethernet Network Adapter E810-XXVDA4 for OCP 3.0
- Intel® Ethernet Network Adapter E810-XXVDA2
- Intel® Ethernet Network Adapter E810-XXVDA4
网卡也有很多优化的地方，可以参见https://developer.aliyun.com/article/1120756。
因特尔网卡指南：https://downloadmirror.intel.com/785819/Adapter_User_Guide_28.2.pdf
标签：intel,E810,Adapter,网卡,RDMA,Network,Ethernet,Intel From： https://www.cnblogs.com/lightdb/p/17842090.html