Abstract
Aiming at minimizing average flow completion time of short flows and reducing flow deadline missed numbers for Online Data-Intensive (OLDI) applications in data center, this paper proposes LSTCP, a dynamic priority-based slack-aware transport control protocol for data center network that adopts the Least Slack First (LSF) scheduling strategy to prioritize flows. LSTCP implements the priority scheduling for emergency flows in the deadline constraint by dynamically adjusting congestion window according to the precedence of the flow and network congestion levels via Explicit Congestion Notification marking. Compared with the traditional deadline-aware TCP, LSTCP reduces the short flow’ AFCT and guarantee the throughput characteristics of long flows. Experiment results show that compared with L2DCT, LSTCP reduces the percentage of the flow missed deadline of 15%, and the AFCT for flows by 25%.
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