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In peer-to-peer file sharing systems, file replication technology is widely used to reduce hot spots and improve file query efficiency. Most current file replication methods replicate files in all nodes or two end points on a client-server query path. However, these methods either have low effectiveness or come at a cost of high overhead. File replication in server side enhances replica hit rate,...
The BitTorrent protocol is by far the most popular protocol for offline peer-to-peer video distribution on the Internet. BitTorrent has previously been extended to support the streaming of recorded video, that is, Video-on-Demand (VoD). In this paper, we take this support for video streaming a step further by presenting extensions to BitTorrent for supporting live video streaming, which we have implemented...
A grid system connects a huge number of computers in the Internet. It integrates the distributed computational resources and data resources. A complex grid system needs to have a characteristic of self-managing. Autonomic computing aims to overcome the rapidly growing complexity of computing system management. It can be implemented to manage complex computing resources in grid systems. We present...
BitTorrent has emerged as an effective peer-to-peer application for digital content distribution in the Internet. However, selecting peers in BitTorrent for efficient content distribution still poses a number of challenges due to high heterogeneities of peers with varied rates of uploading bandwidth and dynamic content. This paper presents GA-BT, a genetic algorithm based peer selection optimization...
The popularity of video websites shows an enormous need for video sharing from individuals. We believe that P2P dissemination services, which leverage users' upload bandwidths, will become pervasive to enable high-quality video multicasting. Though several P2P systems were proposed, we argue that a next-generation one should minimize its peer lag so that concurrent subscribers can enjoy the same home-run...
In this paper we study a reliable downloading algorithm for BitTorrent-like systems, and attest it in mathematics. BitTorrent-like systems have become immensely popular peer-to-peer file distribution tools in the Internet in recent years. We analyze them in theory and point out some of their limitations especially in reliability, and propose an algorithm to resolve these problems by using the redundant...
To improve the performance of similarity search and information retrieval is an important research issue in peer-to-peer environment. In this paper, we propose a distributed architecture for enhancing the performance of similarity search in unstructured P2P networks. The key component of the proposed architecture is a distributed, content-based, heuristic feedback mechanism, which allows peers to...
Quickly acquiring the data required from network node environments to share files in the vast P2P network environment is a challenging job. Many researches have proposed data sharing mechanisms and scheduling methods in P2P environments, however, most focused on the efficient utilization of network bandwidth, using greedy methods to deliver the data to the client end as early as possible. However,...
BitTorrent is an extensively adopted p2p Content Distribution System on the Internet. In spite of its pro-incentive approach and ease of implementation, recent research has empirically shown BitTorrent to be vulnerable to strategic manipulation by its constituent peers in a swarm. Moreover, Honest Piece Revelation and Free-Riding is becoming an increasing concern. Our findings indicate that till date,...
Locality promotion in P2P content distribution networks is currently a major research topic. One of the goals of all discussed approaches is to reduce the interdomain traffic that causes high costs for ISPs. However, the focus of the work in this field is generally on the type of locality information that is provided to the overlay and on the entities that exchange this information. An aspect that...
It is crucial for P2P applications to control their traffics for saving the Internet bandwidth. During the P2P communication, if peers tend to share the data with near peers, the Internet traffic can be reduced. Thus the topology of the P2P networks will be clustering. In this article, we study downloading strategies for the living P2P applications with clustering topology. First, we combine two popular...
BitTorrent, one of the most popular content distribution protocols nowadays, has an identification generation scheme that is completely autonomous. Furthermore, BitTorrent uses a random mechanism to discover new peers. This leaves the system vulnerable to a sybil attack, by which an entity associates multiple identifications to itself in an attempt to fool the other peers that execute the agreed protocol...
P2P software bring convenient and pleasure to P2P users, but become a problem of ISP, because they produce huge traffic on network, especially on cross-network links, which increases financial burden on ISP. The reason partially comes from the fact that when P2P software build their overlay network, they ignore the underlying network topology, and select neighbors randomly, so most of the traffic...
P2P and SIP have its own advantages in media session establishment and transmission. A P2P-SIP based hierarchical architecture for real time stream media communication has been designed in this paper. In the hierarchical architecture, SIP is used to establish the media session, and P2P is adopted to maintain the overlay network architecture and transmit the stream media file. Because of the difference...
In recent years application-level networking (e.g. overlay networks, P2P networks) has become key enabling architecture for supporting distributed services on the Internet. We consider overlays to have delay and cost requirements and thus there exists an optimal distribution of the overlay traffic (the service engineering problem) across multi-domain underlay networks such that these requirements...
The emergence of peer-to-peer (P2P) applications has posed a threat to the operating cost of Internet Service Providers (ISPs) due to the large amount of inter-ISP traffic generated. The problem stems from the mismatch between the P2P overlay network formed randomly and the underlying physical network. Recently, BitTorrent has attracted enormous users by its convenience of large-scale content distribution...
With the explosive growth of data-concentrated applications over Internet, the distribution of huge data in large scales with guarantee of quality of service (QoS), remains an elusive goal in both current and future Internet. The potential integration of peer-to-peer (P2P) paradigm into the Internet content distribution infrastructure provides a disruptive market opportunity to scale the Internet...
Novel network architectures with distributed service components on both routers and end-systems have been proposed to provide the necessary flexibility in the next-generation Internet. Such architectures allow services to be composed along the data path to satisfy different communication requirements. A major operational challenge in such systems is to determine where to perform the required services...
Online storage systems that provide versatile and convenient platforms for content distribution have attracted significant attention over the Internet. To guarantee adequate levels of service quality and to minimize server cost, such systems typically deploy dedicated servers while effectively utilizing peer bandwidth in a complementary fashion. It is essential to understand the role of servers and...
BitTorrent, one of the most popular peer-to-peer file sharing applications, accounts for a large proportion of the total Internet traffic. While its appearance benefits the content distributors and users, the traffic injected into the network backbone has become a great challenge for the ISPs. In this paper, we study traffic shaping in BitTorrent-like applications to improve traffic locality and enable...
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