Automated operator placement in distributed Data Stream Management Systems subject to user constraints

C. Thoma, Alexandros Labrinidis, Adam J. Lee
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引用次数: 12

Abstract

Traditional distributed Data Stream Management Systems assign query operators to sites by optimizing for some criterion such as query throughput, or network delay. The work presented in this paper begins to augment this traditional operator placement technique by allowing the user issuing a continuous query to specify a variety of constraints - including collocation, upstream/downstream, and tag- or attribute-based constraints - controlling operator placement within the query network. Given a set of constraints, operators, and sites; four strategies are presented for optimizing the operator placement. An optimal brute force algorithm is presented first for smaller cases, followed by linear programming, constraint satisfaction, and local search strategies. The four methods are compared for speed, accuracy, and efficiency, with constraint satisfaction performing the best, and allowing assignments to be adapted on the fly by the DDSMS.
受用户约束的分布式数据流管理系统中的自动操作员位置
传统的分布式数据流管理系统通过优化查询吞吐量或网络延迟等标准来为站点分配查询操作符。本文提出的工作是通过允许用户发出连续查询来指定各种约束(包括搭配、上游/下游和基于标签或属性的约束)来扩展这种传统的操作符放置技术,这些约束控制着查询网络中的操作符放置。给定一组约束、操作符和站点;提出了优化操作人员布局的四种策略。首先针对较小的情况提出了最优蛮力算法,然后是线性规划、约束满足和局部搜索策略。比较了四种方法的速度、精度和效率,其中约束满足表现最好,并且允许DDSMS动态地调整分配。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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