CFR: A Peer-to-Peer Collaborative File Repository System

Abstract

Abstract. Due to the high availability of the Internet, many large crossorganization collaboration projects, such as SourceForge, grid systems etc., have emerged. One of the fundamental requirements of these collaboration efforts is a storage system to store and exchange data. This storage system must be highly scalable and can efficiently aggregate the storage resources contributed by the participating organizations to deliver good performance for users. In this paper, we propose a storage system, Collaborative File Repository (CFR), for large scale collaboration projects. CFR uses peer-to-peer techniques to achieve scalability, efficiency, and ease of management. In CFR, storage nodes contributed by the participating organizations are partitioned according to geographical regions. Files stored in CFR are automatically replicated to all regions. Furthermore, popular files are duplicated to other storage nodes of the same region. By doing so, data transfers between users and storage nodes are confined within their regions and transfer efficiency is enhanced. Experiments show that our replication can achieve high efficiency with a small number of duplicates.

Malugo: A peer-to-peer storage system

“…The HIERAS system proposed a multiple-layered ring to reflect the network locality, but this system needs to maintain complex finger tables between layers. Lin et al (2007) have presented a CFR system, which is one of the peer-to-peer storage systems, which also bases on the Chord framework. Peers are all in the same ring topology in the CFR system, but they have different region ID numbers.…”

“…Since the advantages of scalability and robustness of peer-to-peer system, a lot of peer-to-peer storage systems have been proposed such as Freenet (Clarke et al, 2000), OceanStore (Kubiatowicz et al, 2000), PAST , CFS (Dabek et al, 2001) and CFR (Lin et al, 2007). To keep a number of replicas all over the system, some of these systems implement their replication mechanisms with the need of global information.…”