NDLI: Uplink allocation beyond choke/unchoke: or how to divide and conquer best

Content Provider	ACM Digital Library
Author	Laoutaris, Nikolaos Michiardi, Pietro Carra, Damiano
Abstract	Motivated by emerging cooperative P2P applications we study new uplink allocation algorithms for substituting the rate-based choke/unchoke algorithm of BitTorrent which was developed for non-cooperative environments. Our goal is to shorten the download times by improving the uplink utilization of nodes. We develop a new family of uplink allocation algorithms which we call BitMax, to stress the fact that they allocate to each unchoked node the maximum rate it can sustain, instead of an 1/(k + 1) equal share as done in the existing BitTorrent. BitMax computes in each interval the number of nodes to be unchoked, and the corresponding allocations, and thus does not require any empirically preset parameters like k. We demonstrate experimentally that Bit-Max can reduce significantly the download times in a typical reference scenario involving mostly ADSL nodes. We also consider scenarios involving network bottlenecks caused by filtering of P2P traffic at ISP peering points and show that BitMax retains its gains also in these cases.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISBN	9781605582108
DOI	10.1145/1544012.1544030
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-12-09
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Bittorrent Peer-to-peer Uplink bandwidth allocation
Content Type	Text
Resource Type	Article

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Uplink allocation beyond choke/unchoke: or how to divide and conquer best