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The Michigan benchmark: towards XML query performance diagnostics

机译:密歇根基准测试:面向XML查询性能诊断

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摘要

We propose a micro-benchmark for XML data management to aid engineers in designing improved XML processing engines. This benchmark is inherently different from application-level benchmarks, which are designed to help users choose between alternative products. We primarily attempt to capture the rich variety of data structures and distributions possible in XML, and to isolate their effects, without imitating any particular application. The benchmark specifies a single data set against which carefully specified queries can be used to evaluate system performance for XML data with various characteristics. We have used the benchmark to analyze the performance of three database systems: two native XML DBMSs, and a commercial ORDBMS. The benchmark reveals key strengths and weaknesses of these systems. We find that commercial relational techniques are effective for XML query processing in many cases, but are sensitive to query rewriting, and require better support for efficiently determining indirect structural containment. In addition, the benchmark also played an important role in helping the development team of Timber (our native XML DBMS) devise a more effective access method, and fine tune the implementation of the structural join algorithms.
机译:我们提出了XML数据管理的微型基准,以帮助工程师设计改进的XML处理引擎。该基准与应用程序级基准有本质上的区别,后者旨在帮助用户在替代产品之间进行选择。我们主要尝试在不模仿任何特定应用程序的情况下,捕获XML中可能存在的多种数据结构和分布,并隔离其影响。基准测试指定一个数据集,可以使用针对该数据集的精心指定的查询来评估具有各种特征的XML数据的系统性能。我们已经使用基准测试来分析三个数据库系统的性能:两个本地XML DBMS和一个商业ORDBMS。基准测试揭示了这些系统的主要优点和缺点。我们发现,商业关系技术在许多情况下对于XML查询处理都是有效的,但是对查询重写敏感,并且需要更好的支持来有效地确定间接结构约束。此外,该基准测试在帮助Timber(我们的本机XML DBMS)开发团队设计更有效的访问方法以及微调结构连接算法的实现方面也发挥了重要作用。

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