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arXiv 2008.06640cs.DBcs.LG
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混合存储器存储结构的自动选择

Automatic Storage Structure Selection for hybrid Workload

Harbin Institute of Technology(哈尔滨工业大学)

Hongzhi Wang, Yan Wei, Hao Yan

摘要:

在数据库系统的使用中,存储引擎和数据模型的设计直接影响数据库执行查询时的性能。因此,数据库的使用者需要根据遇到的工作量来选择存储引擎和设计数据模型。然而,在混合工作负载中,数据库的查询集是动态变化的,其最优存储结构的设计也在变化。基于此,提出了一种基于学习代价的存储结构自动选择系统,用于在混合负载下动态选择数据库的最优存储结构。在该系统中,我们引入了一种机器学习方法来建立存储引擎的成本模型,以及一种面向列的数据布局生成算法。实验结果表明,该系统能够根据当前的工作负载选择存储引擎和数据模型的最优组合,大大提高了默认存储结构的性能。系统设计为兼容不同的存储引擎,便于实际应用。

英文摘要:

In the use of database systems, the design of the storage engine and data model directly affects the performance of the database when performing queries. Therefore, the users of the database need to select the storage engine and design data model according to the workload encountered. However, in a hybrid workload, the query set of the database is dynamically changing, and the design of its optimal storage structure is also changing. Motivated by this, we propose an automatic storage structure selection system based on learning cost, which is used to dynamically select the optimal storage structure of the database under hybrid workloads. In the system, we introduce a machine learning method to build a cost model for the storage engine, and a column-oriented data layout generation algorithm. Experimental results show that the proposed system can choose the optimal combination of storage engine and data model according to the current workload, which greatly improves the performance of the default storage structure. And the system is designed to be compatible with different storage engines for easy use in practical applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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