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On How to Provision Quality of Service (QoS) for Large Dataset Transfers

Authors:
Zhenzhen Yan
Malathi Veeraraghavan
Chris Tracy
Chin Guok

Keywords: policing; scheduling; high-speed networks; traffic-engineering; virtual-circuit networks

Abstract:
There is recent interest in using traffic-engineered, QoS-controlled paths for large-sized, high-rate dataset transfers in the scientific community. We refer to TCP flows created by such transfers as alpha flows. Research-and-education network providers are interested in intra-domain traffic engineering systems for identifying alpha flows at ingress routers within their networks, and redirecting them to traffic-engineered paths. This is primarily because of the adverse effects these alpha flows have on delay-sensitive multimedia flows. The focus of this work is to determine what QoS mechanisms are suitable to achieve the dual goals of preventing alpha flows from adversely affecting delay-sensitive flows, while simultaneously allowing them to enjoy high throughput. The interaction between policing schemes on the ingress interfaces and scheduling schemes on the egress interfaces was studied through a set of experiments on a high-speed router testbed. Our conclusions are that a scheduling-only mechanism, with no policing, is well suited to achieve these dual goals if the level of fairness offered by today's IP-routed service is sufficient for simultaneous alpha flows.

Pages: 13 to 21

Copyright: Copyright (c) IARIA, 2013

Publication date: April 21, 2013

Published in: conference

ISSN: 2308-4022

ISBN: 978-1-61208-263-9

Location: Venice, Italy

Dates: from April 21, 2013 to April 26, 2013