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arXiv 1401.4972cs.DC
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紧凑确定性自稳定领导者选举:健谈的指数优势

Compact Deterministic Self-Stabilizing Leader Election: The Exponential Advantage of Being Talkative

Lélia Blin, Sébastien Tixeuil

摘要:

本文主要研究领导选举问题的紧致确定性自稳定解。当要求协议是\emph{silent}时(即,当通信内容在任何执行期间从某个时间点起保持固定时),对于参与领导者选举的每个节点,存在存储器的Ω(\log n)位的下限(其中n表示系统中的节点数)。这个下界甚至在环中也成立。我们提出了一个新的确定性(非沉默)自稳定协议的n节点环,只使用O(\log \log n)每个节点的内存位,并稳定在O(n \log^2 n)轮。我们的协议有几个有吸引力的功能,使其适合于实际用途。首先,通信模型与现有编译器用于真实网络的模型相吻合。第二,环的大小(或该大小的任何上限)不需要被任何节点知道。第三,节点标识符可以具有各种大小。最后,除了弱公平调度器之外,没有同步假设。因此,我们的研究结果表明,也许令人惊讶的是,交易沉默指数改善的记忆空间并没有在稳定时间或最小假设的高成本。

英文摘要:

This paper focuses on compact deterministic self-stabilizing solutions for the leader election problem. When the protocol is required to be \emph{silent} (i.e., when communication content remains fixed from some point in time during any execution), there exists a lower bound of Omega(\log n) bits of memory per node participating to the leader election (where n denotes the number of nodes in the system). This lower bound holds even in rings. We present a new deterministic (non-silent) self-stabilizing protocol for n-node rings that uses only O(\log\log n) memory bits per node, and stabilizes in O(n\log^2 n) rounds. Our protocol has several attractive features that make it suitable for practical purposes. First, the communication model fits with the model used by existing compilers for real networks. Second, the size of the ring (or any upper bound on this size) needs not to be known by any node. Third, the node identifiers can be of various sizes. Finally, no synchrony assumption, besides a weakly fair scheduler, is assumed. Therefore, our result shows that, perhaps surprisingly, trading silence for exponential improvement in term of memory space does not come at a high cost regarding stabilization time or minimal assumptions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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