NDLI: Stability of a peer-to-peer communication system

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The impact of memory models on software reliability in multiprocessors

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Time bounds for shared objects in partially synchronous systems

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Easy impossibility proofs for k-set agreement in message passing systems

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Partial reversal acyclicity

Stability of a peer-to-peer communication system

Content Provider	ACM Digital Library
Author	Zhu, Ji Hajek, Bruce
Abstract	Peer-to-peer (P2P) communication in networks for file distribution and other applications is a powerful multiplier of network utility, due to its ability to exploit parallelism in a distributed way. As new variations are engineered, to provide less impact on service providers and to provide better quality of service, it is important to have a theoretical underpinning, to weigh the effectiveness of various methods for enhancing the service. This paper focuses on the stationary portion of file download in an unstructured P2P network, which typically follows for many hours after a flash crowd initiation. The contribution of the paper is to identify how much help is needed from the seeds, either fixed seeds or peers dwelling in the system after obtaining the complete file, to stabilize the system. It is shown that dominant cause for instability is the missing piece syndrome, whereby one piece becomes very rare in the network. It is shown that very little dwell time is necessary--even if there is very little help from a fixed seed, peers need to dwell on average no longer than it takes to upload one additional piece, after they have obtained a complete collection.
Starting Page	321
Ending Page	330
Page Count	10
File Format	PDF
ISBN	9781450307192
DOI	10.1145/1993806.1993867
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-06-06
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Markov process Missing piece syndrome Branching process Foster-lyapunov stability Peer to peer Random peer contact Random useful piece upload
Content Type	Text
Resource Type	Article

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