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In this article, we present the design and implementation of SISYPHUS, a storage manager for data cubes that provides an efficient physical base for performing OLAP operations. On-Line Analytical Processing (OLAP) poses new requirements to the physical storage layer of a database management system. Special characteristics of OLAP cubes such as multidimensionality, hierarchical structure of dimensions, data sparseness, etc., are difficult to handle with ordinary record-oriented storage managers.doi:10.1016/s0169-023x(02)00178-7 fatcat:ap4s3dwuprgedc5ph4nzgqvlvu