Massive Multiplayer Online Games with their virtual gaming worlds grow in user numbers as well as in the size of the virtual worlds. With this growth comes a significant increase of the requirements for server hardware. Today an MMOG provider usually faces the problem of serving thousands of users with entire server clusters. Peer-to-Peer networks with their high scalability and flexibility meet the requirements of connecting hundreds of thousands of people all over the world without a central server. In doing so the network bandwidth requirements remain at a reasonable level.In this work we propose to combine MMOGs with a Peerto-Peer network. We introduce a game architecture capable of exploiting the flexibility and scalability of P2P networks. A P2P architecture based on an overlay network using distributed hash tables with support for persistent object storage and event distribution has been developed to meet MMOG requirements.
Abstract. Classical knowledge production is an author-centered process. The emergence of cooperative internet technologies such as wikis or blogs shows a shift towards stronger cooperative production and communication of knowledge, closing the gap between readers and authors. The incorporation of such participatory mechanisms into CSCL/CSCW systems raises several new requirements. We present an open service infrastructure that provides an architecture meeting these demands, while integrating itself into a network of already-established services.
The recent developments in the scope of Web 2.0 highlight the benefits of exchanging users' experiences and turn the focus onto collaborative working. E-Learning ecosystems and CSCW systems should aim to provide as many functionalities as needed from users in order to act as a centralized interface for their collaborative learning and daily work. Since more and more functionalities are made available as webservices, these can be adapted into a collaborative system. In contemporary collaborative systems, however, such an adaption is often a challenge.Service oriented architectures (SOAs) facilitate the adaption and linking of webservices and build an ideal platform for new e-Learning ecosystems and CSCW systems. This paper presents the key aspects of turning the established CSCW system open-sTeam into a service oriented architecture (SOA). Our new flexible Wasabi framework, based on EJB 3 and JBoss, results in the next level of e-Learning ecosystems and CSCW enterprise architectures which is highly adaptable due to the support of webservices.
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