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CORRELATION AND PARALLELISM AWARE MATERIALIZED VIEW RECOMMENDATION FOR HETEROGENEOUS, DISTRIBUTED DATABASE SYSTEMS

机译:异构,分布式数据库系统的相关性和并行化预警材料推荐视图

摘要

A method is provided for generating a materialized view recommendation for at least one back-end server that is connected to a front-end server in a heterogeneous, distributed database system that comprises parsing a workload of federated queries to generate a plurality of query fragments; invoking a materialized view advisor on each back-end server with the plurality of query fragments to generate a set of candidate materialized views for each of the plurality of query fragments; identifying a first set of subsets corresponding to all nonempty subsets of the set of candidate materialized views for each of the plurality of query fragments; identifying a second set of subsets corresponding to all subsets of the first set of subsets that are sorted according to a dominance relationship based upon a resource time for the at least one back-end server to provide results to the front-end server for each of the first set of subsets; and performing a cost-benefit analysis of each of the second set of subsets to determine a recommended subset of materialized views that minimizes a total resource time for running the workload against the at least one back-end server.
机译:提供了一种用于为异构分布式数据库系统中的连接到前端服务器的至少一个后端服务器生成物化视图推荐的方法,该方法包括解析联合查询的工作负载以生成多个查询片段;用多个查询片段在每个后端服务器上调用实例化视图顾问,以为多个查询片段中的每个查询片段生成一组候选实例化视图;为多个查询片段中的每一个识别与候选实现视图集合的所有非空子集相对应的第一子集集合;标识与第一子集的所有子集相对应的第二子集,第二子集的第一子集的所有子集均基于优势关系进行排序,基于资源关系时间,至少一个后端服务器为每个子集提供结果给前端服务器第一组子集;对第二组子集的每个子集进行成本效益分析,以确定推荐的实体化视图子集,该子集可以最大程度地减少针对至少一个后端服务器运行工作负载的总资源时间。

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