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A Group-Based Replica Consistency Schema for Cloud Storage

机译：云存储的基于组的副本一致性架构

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Replica is the most meaning of data availability, scalability and reliability in the cloud storage. There are rooms for reducing the cost of consistency by designing an effective replica management schema. To address the conflict between potential inconsistency and efficiency problem, a new group based replica consistency schema, namely GBRC, was proposed in this paper. The schema will divide replicas located on different network topology into independent replica groups and provide two kinds of consistency management mechanism for replica group and replica members of group. In the GBRC, replica group is an autonomous unit on group management level. It is an effective way to organize adjacent replica node into the same group to reduce cost of communication and complex of management. In this paper, a novel replica group construction process adapted to select adjacent nodes which meet user storage requirement to be self-consistent group. Then, all groups of the same replica consist of entire replica management system on the top level, which is effective way simplify replicas organization, management and consistency. Experiments show that replica group autonomy consistency respectively can improve consistency speed and simplify metadata management especially when replicas are geographic distributed. In addition, design a new dynamic replica consistency strategy based multi replicas consistency quality of service. The strategy dynamically adapts replica consistency number at runtime to achieve a dynamic service balance between consistency and quality of service. Evaluation results show that consistency strategy improves cloud storage responding speed while guaranteeing the user data storage's consistency requirement.
机译：副本是云存储中数据可用性，可伸缩性和可靠性的最重要含义。通过设计有效的副本管理方案，存在减少一致性成本的余地。为了解决潜在的不一致和效率问题之间的冲突，本文提出了一种新的基于组的副本一致性方案GBRC。该模式会将位于不同网络拓扑上的副本分为独立的副本组，并为副本组和组中的副本成员提供两种一致性管理机制。在GBRC中，副本组是组管理级别上的自治单元。这是将相邻副本节点组织到同一组中以降低通信成本和管理复杂性的有效方法。本文提出了一种新颖的副本组构建过程，该过程适于选择满足用户存储需求的相邻节点作为自洽组。然后，同一副本的所有组都由顶层的整个副本管理系统组成，这是简化副本组织，管理和一致性的有效方法。实验表明，副本组自治一致性分别可以提高一致性速度并简化元数据管理，尤其是在副本是地理分布的情况下。此外，设计一种基于多副本一致性服务质量的新动态副本一致性策略。该策略在运行时动态调整副本一致性编号，以实现一致性和服务质量之间的动态服务平衡。评估结果表明，一致性策略在保证用户数据存储一致性要求的同时，提高了云存储响应速度。

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