![]() ![]() With the aid of a simulation tool, using parameters taken from real-world traces, we show that core traffic can be greatly reduced with respect to traditional centralized, Content Distribution Network (CDN) or locality-aware asymmetric schemes. In this work we evaluate the impact of next-generation optical access networks - and specifically their symmetric bandwidth and customer aggregation features - on the feasibility of locality-aware peer-to-peer content distribution schemes. Locality-aware policies have been proposed to tackle these issues, but their effectiveness is limited by the low probability of finding enough peers with the required content. Peer-to-Peer represents a scalable and inexpensive strategy to deliver content to end-customers unfortunately, it poses a sever strain on the network core and generates high costs for service providers. ![]() This is summarized in Fig.Ĭontent Distribution currently accounts for the vast majority of Internet traffic. In this section we describe the main players of this ecosystem as well as its functionality. to refer to this complex system as the BitTorrent Ecosystem. In this paper we adopt the terminology used by Zhang et al. Due to the great success of this protocol a complex system was created around it. B IT T ORRENT E COSYSTEM BitTorrent is the name used by Brian Cohen to define the peer-to-peer file-sharing protocol that he designed one decade ago. Finally, we describe the main challenges that these techniques face and the possible solution to them in Section IV before concluding the paper in Section V. Afterwards, Section III presents a survey of the existing BitTorrent measurement techniques. In this paper we firstly describe the main aspects and functionality of the complete BitTorrent Ecosystem in Section II. Several techniques have been used in order to measure different aspects of BitTorrent so far, however to the best of the authors knowledge there is no document that compiles, describes and classifies these techniques. Due to the complexity of the system, the most relevant studies have tried to understand different aspects by performing real measurements of BitTorrent swarms in the wild, this is inferring information from real swarms in real time. This has attracted the interest of the research community that has thoroughly evaluated the performance and the demographic aspects of BitTorrent. Indeed, it is responsible for a major portion of the Internet traffic share and is daily used by dozens of millions of users. I NTRODUCTION BitTorrent is the most successful peer-to-peer file- sharing application.
0 Comments
Leave a Reply. |