@inproceedings{hu2020aeolus,
author = {Hu, Shuihai and Bai, Wei and Zeng, Gaoxiong and Wang, Zilong and Qiao, Baochen and Chen, Kai and Tan, Kun and Wang, Yi},
title = {Aeolus: A Building Block for Proactive Transport in Datacenters},
booktitle = {2020 ACM Special Interest Group on Data Communication},
year = {2020},
month = {July},
abstract = {As datacenter network bandwidth keeps growing, proactive transport becomes attractive, where bandwidth is proactively allocated as "credits" to senders who then can send "scheduled packets" at a right rate to ensure high link utilization, low latency, and zero packet loss. While promising, a fundamental challenge is that proactive transport requires at least one-RTT for credits to be computed and delivered. In this paper, we show such one-RTT "pre-credit" phase could carry a substantial amount of flows at high link-speeds, but none of existing proactive solutions treats it appropriately. We present Aeolus, a solution focusing on "pre-credit" packet transmission as a building block for proactive transports. Aeolus contains unconventional design principles such as scheduled-packet-first (SPF) that de-prioritizes the first-RTT packets, instead of prioritizing them as prior work. It further exploits the preserved, deterministic nature of proactive transport as a means to recover lost first-RTT packets efficiently. We have integrated Aeolus into ExpressPass[14], NDP[18] and Homa[29], and shown, through both implementation and simulations, that the Aeolus-enhanced solutions deliver signiicant performance or deployability advantages. For example, it improves the average FCT of ExpressPass by 56%, cuts the tail FCT of Homa by 20x, while achieving similar performance as NDP without switch modifications.},
publisher = {ACM},
url = {http://approjects.co.za/?big=en-us/research/publication/aeolus-a-building-block-for-proactive-transport-in-datacenters/},
pages = {422-434},
}