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CooMR: Cross-task coordination for efficient data management in MapReduce programs

机译:COMR:MapReduce程序中有效数据管理的交叉任务协调

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Hadoop is a widely adopted open source implementation of MapReduce programming model for big data processing. It represents system resources as available map and reduce slots and assigns them to various tasks. This execution model gives little regard to the need of cross-task coordination on the use of shared system resources on a compute node, which results in task interference. In addition, the existing Hadoop merge algorithm can cause excessive I/O. In this study, we undertake an effort to address both issues. Accordingly, we have designed a cross-task coordination framework called CooMR for efficient data management in MapReduce programs. CooMR consists of three component schemes including cross-task opportunistic memory sharing and log-structured I/O consolidation, which are designed to facilitate task coordination, and the key-based in-situ merge (KISM) algorithm which is designed to enable the sorting/merging of Hadoop intermediate data without actually moving the key, value> pairs. Our evaluation demonstrates that CooMR is able to increase task coordination, improve system resource utilization, and significantly speed up the execution time of MapReduce programs.
机译:Hadoop是MapReduce编程模型的广泛采用的开源实现,用于大数据处理。它将系统资源代表为可用地图并减少插槽并将其分配给各种任务。此执行模型几乎没有关于在计算节点上使用共享系统资源的跨任务协调的需要,这导致任务干扰。此外,现有的Hadoop合并算法可能导致I / O过量。在这项研究中,我们努力解决这两个问题。因此,我们设计了一个名为CoMR的跨任务协调框架,用于MapReduce程序中的有效数据管理。 COMR由三个组件方案组成,包括跨任务机会内存共享和日志结构的I / O整合,这些方案旨在促进任务协调,以及旨在启用排序的基于密钥的原位合并(KISM)算法/合并Hadoop中间数据而不实际移动对。我们的评估表明,COMR能够提高任务协调,提高系统资源利用率,并显着加快MapReduce程序的执行时间。

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