An Optimized Computational Model for Multi-Community-Cloud Social Collaboration

An Optimized Computational Model for Multi-Community-Cloud Social Collaboration
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多社区云社交协作的优化计算模型

DOI:
10.1109/tsc.2014.2304728
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发表时间:
2014-02
影响因子:
8.1
通讯作者:
杨天若
杨天若
中科院分区:
计算机科学2区
文献类型:
--
作者:
王飞;林曼;罗常青;杨天若

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社区云计算是一种新兴且有前途的计算模型,针对具有共同关注点(例如安全性、合规性和管辖权)的特定社区。它利用联网计算机的闲置资源来提供设施,使社区从云中获得服务。社区云之间的有效协作为包含需要数据交换的子任务的复杂任务提供了强大的计算能力。选择最经济高效、通信效率最高、安全且值得信赖的最佳社区云组来完成复杂的任务非常具有挑战性。为了解决这个问题,我们首先制定了多社区云协作的计算模型,即MG3。然后从四个方面对所提出的模型进行优化:最小化访问成本和货币成本之和,最大化社区云之间的安全级别协议和信任。此外,设计了一种高效、全面的选择算法来提取 MG3 中最好的社区云组。最后,对所提出的算法进行了广泛的仿真实验和性能分析。结果表明,所提出的算法优于基于最小集覆盖的算法和随机算法。此外,所提出的综合社区云选择算法可以在访问成本、货币成本、安全级别以及用户与社区云之间的信任方面保证良好的全局性能。
Community Cloud Computing is an emerging and promising computing model for a specific community with common concerns, such as security, compliance and jurisdiction. It utilizes the spare resources of networked computers to provide the facilities so that the community gains services from the cloud. The effective collaboration among the community clouds offers a powerful computing capacity for complex tasks containing the subtasks that need data exchange. Selecting the best group of community clouds that are the most economy-efficient, communication-efficient, secured, and trusted to accomplish a complex task is very challenging. To address this problem, we first formulate a computational model for multi-community-cloud collaboration, namely MG3. The proposed model is then optimized from four aspects: minimizing the sum of access cost and monetary cost, maximizing the security-level agreement and trust among the community clouds. Furthermore, an efficient and comprehensive selection algorithm is devised to extract the best group of community clouds in MG3. Finally, the extensive simulation experiments and performance analysis of the proposed algorithm are conducted. The results demonstrate that the proposed algorithm outperforms the minimal set coverings based algorithm and the random algorithm. Moreover, the proposed comprehensive community clouds selection algorithm can guarantee good global performance in terms of access cost, monetary cost, security level and trust between user and community clouds.
DOI: --
发表时间: 2014
期刊: --
影响因子: --
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