收稿日期: 2016-06-27
网络出版日期: 2016-11-29
基金资助
国家 973 计划项目(2012CB316203); 国家 863 计划项目(2015AA015307); 国家自然科学基金(61332006, 61472321, 61502390)
GraphHP: A hybrid platform for iterative graph processing
Received date: 2016-06-27
Online published: 2016-11-29
BSP(Bulk Synchronous Parallel, BSP)计算模型是建立大规模迭代式图处理分布式系统的重要基础. 现有平台(如 Pregel、Giraph、Hama)虽然已经实现了较高的可扩展性, 但主机之间高频同步和通信负荷严重影响了并行计算的效率. 为了解决这个关键性问题, 本文提出了一种基于混合式模型的执行平台 GraphHP(Graph Hybrid Processing). 它不仅继承了以顶点为中心的 BSP 编程接口, 而且能够显著减少同步和通信负荷. 通过在图分区内部和分区之间建立混合执行模型, GraphHP 实现了伪超步迭代计算, 把分区内部计算从分布式同步和通信中分离出来. 这种混合执行模型不需要繁重的调度算法或者以图为中心的串行算法, 就能有效减少同步和通信负荷. 最后, 本文评估了经典的 BSP 应用在 GraphHP 平台的实现方式. 实验表明它比现有的 BSP 实现平台效率更高. 本文提出的 GraphHP 平台虽然是基于Hama 实现的, 但它很容易迁移到其他的 BSP 平台.
苏 静 , 索 博 , 陈 群 , 潘 魏 , 李战怀 . GraphHP:一个图迭代处理的混合平台[J]. 华东师范大学学报（自然科学版）, 2016 , 2016(5) : 112 -120 . DOI: 10.3969/j.issn.1000-5641.2016.05.013
BSP (Bulk Synchronous Parallel) computing model is an important foundation for the establishment of a large-scale iterative graph processing distributed system. Existing platforms (e.g., Pregel, Giraph, and Hama) have achieved a high scalability, but the high frequency synchronization and communication load between the hosts have seriously affected the efficiency of parallel computing. In order to solve this key problem, this paper proposes a hybrid model based on GraphHP (Graph Hybrid Processing). It not only inherits the BSP programming interface with the vertex as the center, but also can significantly reduce the synchronization and communication load. By establishing the hybrid execution model between the interior and the interval partition of the graph, the GraphHP realizes the pseudo super step iteration calculation, and separates the internal computation from the distributed synchronization and communication. This hybrid execution model does not need heavy scheduling algorithm or the serial algorithm can effectively reduce the synchronization and communication load. Finally, this paper evaluates the implementation of the classic BSP application in the GraphHP platform, and the experiment shows that it is more efficient than the existing BSP platform. Although the GraphHP platform proposed in this paper is based on Hama, it is easy to migrate to other BSP platforms.
Key words： graph iterative; distributed computation; BSP; GraphHP
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