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ECN Works Better for Selective Dropping in High Bandwidth-Delay Product Connections

Authors:
Mahmoud Bahnasy
Ali Munir
Junjie Niu
Zhibo Yan
Peng Dong
Yashar Ganjali

Keywords: Inter-Data Centers Communication; Cross Data Centers Communications; Transport Protocol; Congestion Control.

Abstract:
Modern Internet services and applications distribute data and compute on different geographically distributed data centers to improve performance and reliability. For example, content providers distribute their data centers among different regional areas and periodically replicate the content between data centers. Moreover, Geo-Distributed Machine Learning (Geo-DML) is emerged to satisfy the need to train large sophisticated models. Such a new model of training requires a very robust and reliable inter-data center transport layer. Such a design raises the need for high-speed reliable inter-data center transport. The conservative reaction of the Transport Control Protocol (TCP) in such long Round-Trip Time (RTT) connections cause huge degradation in the throughput. For example, TCP is able to utilize only 40% of a 10-Gbps link between two data centers with RTT = 10ms and it gets even worse when packet loss occurs. We present Data Center Interconnect-Bridging (DCIB) as a method for recovering lost packets in such a scenario by allowing the router to drop pre-selected packets that can easily recovered by the edge routers without triggering TCP’s reaction at the host. Several simulation experiments show that DCIB can increase link utilization by a factor of 6x in highly congested connections, and reduce flow completion time by up to 85%.

Pages: 1 to 6

Copyright: Copyright (c) IARIA, 2025

Publication date: May 18, 2025

Published in: conference

ISSN: 2308-4413

ISBN: 978-1-68558-277-7

Location: Nice, France

Dates: from May 18, 2025 to May 22, 2025