Designing an effective P2P system for a VoD system to exploit the multicast communication
Issue date
2010Suggested citation
Yang, X. Y.;
Cores Prado, Fernando;
Hernández Budé, Porfidio;
Ripoll, A.;
Luque, Emilio;
.
(2010)
.
Designing an effective P2P system for a VoD system to exploit the multicast communication.
Journal of Parallel and Distributed Computing, 2010, vol. 70, núm. 12, p. 1175-1192.
https://doi.org/10.1016/j.jpdc.2010.07.007.
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Show full item recordAbstract
A distributed video-on-demand system (DVoD) with multiple server-nodes is a cost-effective and faulttolerant
solution for a high scalable enterprise video-on-demand (VoD) system. However, such a serveroriented
design is highly vulnerable to workload variations given that the service capacity is limited.
Peer-to-Peer (P2P) has been introduced as an architectural solution with self-growing capacity. However,
the characteristics of a pure P2P system such as the peer transient nature and high network overhead
make this kind of architecture unsuitable for a fully interactive VoD system. In this paper, we propose
a new efficient integrated VoD architecture, called DPn2P
m, that combines DVoD with a P2P system and
multicast communications. The DVoD’s server-nodes provide a minimum required quality of service (QoS)
and the P2P system is able to offer the mechanism to increase the system service capacity according to
client demands. Multicast communication, wherever it is possible, is effectively exploited by our P2P
system. In our design, each client is able to send video information to a set of m clients using only one
multicast channel. Furthermore, the collaboration mechanism is able to coordinate a set of clients to create
one collaboration group to replace the server, providing an extensive, efficient and low network-overhead
collaboration mechanism from n-peers to m-peers. Regardless of the video the client is watching, our
P2P scheme allows every active client to collaborate with the server. The P2P scheme is complemented
with recovery mechanisms that are able to replace the failed client before affecting the QoS, offering
continuous playback. The proposed approach has been broadly evaluated, firstly using a mathematical
model to derive the theoretical performance and secondly using a simulation environment to analyze
the system’s dynamic behavior, the VCR interaction impact and the client failures. Comparing DPn2P
m
with other DVoD architectures and the most relevant P2P delivery policies, we show that our design is an
improvement on previous solutions, providing a higher scalability.