Evaluation of intra-group optimistic data replication in P2P groupware systems

摘要

Peer-to-peer (P2P) computing systems have become very popular during the last years because of their abilityrnto scale to a large number of users and efficient communication among peers. They can support complexrncomputational processes, beyond simple file sharing, while offering advantages of decentralized distributedrnsystems. However, such systems may suffer from availability and reliability. To increase availability and reliability,rnand therefore, improve the perception of peers, yielding to fast response times and rich experience,rndata replication techniques are the foremost means in such systems. Indeed, in many P2P applications, forrnexample, in a groupware, documents generated along application life cycle can change over time. The needrnis then to efficiently replicate dynamic documents and data to support group processes and collaboration.rnIn this paper, we propose a replication system for documents structured as XML files and evaluate it underrndifferent scenarios. The proposed system has a super-peer architecture that provides fast consistency for laternjoining peers. It uses optimistic replication techniques with propagating update operations from source torndestination node in push mode. The system is suitable for asynchronous collaboration in online collaborativernteams accomplishing a common project in a P2P environment.