Multidimensional clustering tables - IBM
网页Multidimensional clustering (MDC) provides an elegant method for clustering data in tables along multiple dimensions in a flexible, continuous, and automatic way. MDC can significantly improve query performance.
网页Multidimensional Clustering Tables (MDCs) MDCs are a unique object in DB2 LUW that provide many advantages over other indexes. Particularly regular clustered indexes. Provide continuous, flexible and automatic clustering of data …
Optimization strategies for MDC tables - IBM
网页If you create multidimensional clustering (MDC) tables, the performance of many queries might improve, because the optimizer can apply additional optimization strategies. These strategies are primarily based on the improved efficiency of block indexes, but the advantage of clustering on more than one dimension also permits faster data retrieval.
网页The automated MDC design model is based on what-if query cost modeling, data sampling, and a search algorithm for evaluating a large constellation of possible combinations. The model is effective at trading the benefits of potential combinations of clustering keys against data sparsity and performance.
Section 7.10. Multidimensional Clustering Tables and Block …
网页Multidimensional clustering (MDC), as its name implies, allows for clustering of the physical data pages in multiple dimensions. For example, using the sales table illustrated previously in Figure 7.15, you can cluster the data based on two dimensions: sales_person and year columns.
Chapter 8: Multidimensional Clustering | GlobalSpec
网页MDC enables a database system to cluster data along multiple dimensions at the same time. So, for example, data can be kept clustered by region of sale and by date of sale simultaneously. The essence of MDC is fundamentally to do the impossible: the clustering of data in different ways simultaneously without duplicating the data.
Automated Design of Multidimensional Clustering Tables for Relational ...
网页2004年10月8日 · An industrial implementation of this technique for the DB2® Universal DatabaseTM (DB2 UDB) product, called multidimensional clustering (MDC), which co-exists with other classical forms of data...
Considerations when creating MDC tables - IBM
网页To improve query performance and reduce the overhead of data maintenance operations in a data warehouse or large database environment, you can move data from regular tables into multidimensional clustering (MDC) tables.
Multidimensional clustering | Request PDF - ResearchGate
网页2007年12月31日 · Multidimensional clustering (MDC) has emerged as a powerful new physical database design technique. It has emerged onto the industrial scene with a full implementation in DB2. It offers...
Understanding DB2®: Learning Visually with Examples
网页Multidimensional clustering (MDC), as its name implies, allows for clustering of the physical data pages in multiple dimensions. For example, using the sales table illustrated previously in Figure 7.15, you can cluster the data based on two dimensions: sales_person and year columns. This method of clustering has several benefits over clustering ...
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