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Globally consistent event ordering in one-directional distributed environments

机译:单向分布式环境中的全局一致事件排序

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摘要

We consider communication structures for event ordering algorithms in distributed environments where information flows only in one direction. Example applications are multilevel security and hierarchically decomposed databases. Although the most general one directional communication structure is a partial order, partial orders do not enjoy the property of being consistently ordered, a formalization of the notion that local ordering decisions are ensured to be globally consistent. Our main result is that the crown free property is necessary and sufficient for a communication structure to be consistently ordered. We discuss the computational complexity of detecting crowns and sketch typical applications.
机译:我们考虑信息仅沿一个方向流动的分布式环境中事件排序算法的通信结构。示例应用程序是多层安全性和分层分解的数据库。尽管最通用的一种定向通信结构是部分订单,但是部分订单不具有一致订购的特性,这是确保本地订购决策在全球范围内一致的概念的形式化。我们的主要结果是,无冠冕性质对于使通信结构始终保持一致是必要和充分的。我们讨论了检测牙冠的计算复杂性,并概述了典型应用。

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