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A replication strategy for a distributed high-speed caching system based on spatiotemporal access patterns of geospatial data

机译:基于地理空间数据时空访问模式的分布式高速缓存系统复制策略

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摘要

Distributed high-speed caching uses replication strategies to improve the parallel service efficiency in data-intensive services in cloud-based environments. This paper proposes a replication strategy based on the access pattern of tile in order to optimize load balancing for large-scale user access in cloud-based WebGISs. First, this strategy considers the access bias and repeatability involved in tile access, to cache tiles with higher popularities, and obtains a higher cache hit rate under limited distributed caches. Second, on the basis of the uneven distribution and temporal local changes of tile access, it generates hot tile replicas with a seat allocation scheme to efficiently allocate the distributed cache. Finally, it balances the load for tile access requests based on the spatial correlation and spatial locality in tile access patterns to achieve fast data extraction. Experimental results indicate that the proposed strategy can be adopted to handle numerous WebGISs tile requests in a cloud-based environment. (C) 2014 Elsevier Ltd. All rights reserved.
机译:分布式高速缓存使用复制策略来提高基于云的环境中数据密集型服务的并行服务效率。为了优化基于云的WebGIS中大规模用户访问的负载平衡,本文提出了一种基于图块访问模式的复制策略。首先,此策略考虑了图块访问中涉及的访问偏差和可重复性,以缓存具有较高流行度的图块,并在有限的分布式缓存下获得较高的缓存命中率。其次,基于图块访问的不均匀分布和时间局部变化,它使用座位分配方案生成热图块副本,以有效地分配分布式缓存。最后,它基于图块访问模式中的空间相关性和空间局部性来平衡图块访问请求的负载,以实现快速数据提取。实验结果表明,所提出的策略可用于在基于云的环境中处理大量WebGIS磁贴请求。 (C)2014 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Computers,environment and urban systems》 |2017年第ptab期|163-171|共9页
  • 作者单位

    Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Hubei, Peoples R China;

    Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Hubei, Peoples R China;

    Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Hubei, Peoples R China;

    Univ Wisconsin, Dept Geog, Madison, WI 53706 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Replication; Cache; Access pattern; Load balancing; Big data;

    机译:复制;缓存;访问模式;负载均衡;大数据;

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