Experiences Evaluating DC-TCP

YouTube·Linux Plumbers Conference

Explore experiences evaluating DC-TCP in this Linux Plumbers Conference talk. Discover how preliminary testing with Netesto revealed NIC issues affecting flow fairness and Linux DC-TCP code bugs causing RPC tail latencies up to 200ms. Learn about the subsequent testing in a 6-rack mini cluster running production applications, which demonstrated significant decreases in packet discards at the cost of increased CPU utilization. Gain insights into the issues encountered, fixes implemented, and detailed experimental results. Examine the causes of larger CPU utilization and discuss potential partial solutions to this challenge.