Osprey: peer-to-peer enabled content distribution

ABSTRACT

As the size of data and files increases, digital repositories face a growing problem in content distribution. High quality multimedia and research data sets can range from 100's of megabytes to over a terabyte. Web-based digital repositories may exper ience a substantial increase in operating and bandwidth costs when providing materials to the public. Peer-to-peer networks are sometimes suggested as an alternative to traditional centralized repositories [2]. However, critical issues such as data inte grity, access control, and content availability exist when using peer-to-peer technologies [1].Osprey (http://osprey.ibiblio.org) addresses these problems by combining a flexible metadata management system with the BitTorrent peer-to-peer protocol. A Web database application provides searching and browsing of collection objects, and the peer-to-peer component lowers the bandwidth costs by employing distributed downloading. The Permaseed application supplies reliable, persistent peer-to-peer access to files in the digital repository.

REFERENCES

• 1: Stephanos Androutsellis-Theotokis , Diomidis Spinellis, A survey of peer-to-peer content distribution technologies, ACM Computing Surveys (CSUR), v.36 n.4, p.335-371, December 2004 [doi>10.1145/1041680.1041681]
• 2: Mayank Bawa , Brian F. Cooper , Arturo Crespo , Neil Daswani , Prasanna Ganesan , Hector Garcia-Molina , Sepandar Kamvar , Sergio Marti , Mario Schlosser , Qi Sun , Patrick Vinograd , Beverly Yang, Peer-to-peer research at Stanford, ACM SIGMOD Record, v.32 n.3, September 2003 [doi>10.1145/945721.945728]
• 3: B. Cohen. Incentives build robustness in bittorrent. In Proceedings of the 1st Workshop on Economics of Peer-to-Peer systems, June 2003.

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design
          Subjects: Distributed networks

Additional Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.1 Network Architecture and Design
          Subjects: Network topology

  H. Information Systems
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.7 Digital Libraries
          Subjects: Dissemination; Systems issues

General Terms:
Performance, Reliability

Keywords:
content distribution, digital libraries, peer-to-peer