“ A P 2 P Storage System Based on Erasure Codes
Peer-to-Peer systems, almost unheard of a few years ago, are now becoming one of the most popular Internet applications. The most important use of P2P systems is to store and share files. In a P2P network, nodes may join and leave the system at any time. As a result of the intermittent availability of the nodes, ensuring high availability of the stored data is an interesting and challenging problem. In particular, the tradeoffs between the availability of the files and the redundancy involved in storing the data is not yet well-understood.