Virtual Communities and Community Coordinator.
ABSTRACT The organization of resources/peers in communities is suggested to be an efficient way for resource discovery, but effectiveness of proposed communities depends on the active role and responsibility of a "community coordinator". Communities are pools of diverse peers/services sharing and controlling resources and which have "agreed" to co-operate to enhance their usability; such co-operation needs coordination mechanism, negotiated policies, monitoring and leadership to re-solve disputes. In this paper we will outline the role of a community coordinator to sustain the effective working of the community and to provide the general framework for community formation. This work is related to our previous and on going work on "community formation "  and . Main focus of this paper is to address expectations from the coordinator along with its responsibilities and capabilities.
[Show abstract] [Hide abstract]
ABSTRACT: Due to limited resources, organizations are constantly facing challenges. To take advantage of new opportunities and mitigate possible risks they look for new ways to collaborate with each other, sharing knowledge and competencies. Hence, coordination among partners is critical to achieve success. The segmented South African public sector is no different. Driven by the desire to ensure proper service delivery in the sector, various government bodies and service providers play different roles towards common goals. As such, continuous coordination is required between the role players. This paper investigates Virtual Communities as a possible coordination artifact for supporting sustainable coordination within the South African public sector. The paper commences with a brief introduction. Thereafter, the paper carefully defines the notion of sustainable coordination. It continues then to show that Virtual Communities indeed support the requirements for sustainable coordination. Having argued this at a theoretical level, the paper moves to show how this may be applicable to the South African situation. The paper concludes by emphasizing on the value of virtual communities as separate entities to attain sustainable coordination service provision in the South African public sector. KeywordsSustainable coordination-Coordination mechanisms-Virtual Communities-South African public sector06/2010: pages 62-75;
[Show abstract] [Hide abstract]
ABSTRACT: A fundamental problem in large scale Grids is the need for efficient and scalable techniques for resource discovery and scheduling. In traditional resource scheduling systems a single scheduler handles information about all computing resources and schedules jobs. This centralized approach has a serious scalability problem, since it introduces a bottleneck, as well as a single point of failure. Some decentralized scheduling systems have been proposed to improve scalability. However, the main contributions in this area are generally carried out under the assumption of several coordinated schedulers. Nevertheless this approach leads to high communication costs. Such costs are mainly caused by the strong dependency on negotiation among scheduler-to-scheduler and scheduler-to-resource communication. Current approaches to decentralized resource management - in particularly approaches based on Random Early Detection (RED) - are non-coordinated since these schedulers make scheduling related decisions in an independent way. This paper introduces a collaborative model of decentralized scheduling that improves resource scheduling based on RED strategies via gossiping. With this approach, schedulers can receive information from other schedulers without creating a high communication overhead and continue scheduling jobs in an independent way. The simulation results shows that our proposal is scalable and it handles large resources efficiently on large scale Grids.Proceedings of the 18th Euromicro Conference on Parallel, Distributed and Network-based Processing, PDP 2010, Pisa, Italy, February 17-19, 2010; 01/2010
Conference Paper: Comparison of JXTA and WSRF[Show abstract] [Hide abstract]
ABSTRACT: Virtual collaboration among geographically dispersed resources, groups or organizational units requires support from their environment. The establishment, management and exploitation of dynamic, cross-organizational sharing relationship require new technology, which is independent of any proprietary technology and have backing of mainstream development and research institutes. This paper critically compares two peer-to-peer (P2P) protocols i.e. JXTA and Web services resource framework (WSRF) with respect to their effectiveness for virtual collaboration. The comparison is based on our experiences of developing a prototype for virtual organization. This paper is result of out going research to build community for efficient resource discovery.Cluster Computing and the Grid, 2007. CCGRID 2007. Seventh IEEE International Symposium on; 06/2007