Driving factors for low-latency Ethernet
Ethernet is the de facto standard for data center server and storage connectivity and is by far the most agile and general-purpose network.
There are more workloads, like storage, that used to run over dedicated fabric that are now moving to Ethernet. These workloads require high data throughput and a low-latency network. The advent of NVMe* a...nd NVMe over Fabrics* further drives the demand for higher-speed Ethernet.
Higher-speed Ethernet, 25/40/50/100GbE, significantly increases the network overhead, mainly the TCP/IP stack process, memory copies, and application context switching.
Remote direct memory access (RDMA) is one of the technologies that relieves Ethernet overhead for high-speed applications.