Improving Peer Selection in Peer-to-peer Applications: Myths vs. Reality
RFC 6821
Internet Research Task Force (IRTF) E. Marocco
Request for Comments: 6821 A. Fusco
Category: Informational Telecom Italia
ISSN: 2070-1721 I. Rimac
V. Gurbani
Bell Labs, Alcatel-Lucent
December 2012
Improving Peer Selection in Peer-to-Peer Applications:
Myths vs. Reality
Abstract
Peer-to-peer (P2P) traffic optimization techniques that aim at
improving locality in the peer selection process have attracted great
interest in the research community and have been the subject of much
discussion. Some of this discussion has produced controversial
myths, some rooted in reality while others remain unfounded. This
document evaluates the most prominent myths attributed to P2P
optimization techniques by referencing the most relevant study or
studies that have addressed facts pertaining to the myth. Using
these studies, the authors hope to either confirm or refute each
specific myth.
This document is a product of the IRTF P2PRG (Peer-to-Peer Research
Group).
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Research Task Force
(IRTF). The IRTF publishes the results of Internet-related research
and development activities. These results might not be suitable for
deployment. This RFC represents the consensus of the Peer-to-peer
Research Group Research Group of the Internet Research Task Force
(IRTF). Documents approved for publication by the IRSG are not a
candidate for any level of Internet Standard; see Section 2 of RFC
5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6821.
Marocco, et al. Informational [Page 1]
RFC 6821 Peer Selection in P2P Applications December 2012
Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
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Marocco, et al. Informational [Page 2]
RFC 6821 Peer Selection in P2P Applications December 2012
Table of Contents
1. Introduction ....................................................4
2. Definitions .....................................................5
3. Myths, Facts, and Discussion ....................................6
3.1. Reduced Cross-Domain Traffic ...............................6
3.1.1. Facts ...............................................6
3.1.2. Discussion ..........................................7
3.1.3. Conclusions .........................................7
3.2. Increased Application Performance ..........................7
3.2.1. Facts ...............................................7
3.2.2. Discussion ..........................................8
3.2.3. Conclusions .........................................9
3.3. Increased Uplink Bandwidth Usage ...........................9
3.3.1. Facts ...............................................9
3.3.2. Discussion ..........................................9
3.3.3. Conclusions .........................................9
3.4. Impacts on Peering Agreements ..............................9
3.4.1. Facts ..............................................10
3.4.2. Discussion .........................................10
3.4.3. Conclusions ........................................11
3.5. Impacts on Transit ........................................11
3.5.1. Facts ..............................................11
3.5.2. Discussion .........................................11
3.5.3. Conclusions ........................................11
3.6. Swarm Weakening ...........................................12
3.6.1. Facts ..............................................12
3.6.2. Discussion .........................................12
3.6.3. Conclusions ........................................12
3.7. Improved P2P Caching ......................................12
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