Based on the discussion of ODS (Operational Data Store), enterprise data environment features and data integration requirement, three granularity level data models of Web logs in e-commerce are analyzed. Further, data updating and collecting train of thought has been expressed which is realized by granularity manager. Finally, a model is put up, which integrates e-commerce data and other enterp...

With the prevalence of smartphones, app markets such as Apple App Store and Google Play has become the center stage in the mobile app ecosystem, with millions of apps developed by tens of thousands of app developers in each major market. This paper presents a study of the mobile app ecosystem from the perspective of app developers. Based on over one million Android apps and 320,000 developers f...

This paper presents research-in-progress. An extensive customer-centric data warehouse architecture should enable both complex analytical queries as well as standard reporting queries on customer data without performance restrictions for both requirements. This paper introduces a dichotomic approach, which brings together these contradicting tasks of a data warehouse. On the one hand, it elabor...

In recent years, column stores (or C-stores for short) have emerged as a novel approach to deal with read-mostly data warehousing applications. Experimental evidence suggests that, for certain types of queries, the new features of C-stores result in orders of magnitude improvement over traditional relational engines. At the same time, some C-store proponents argue that C-stores are fundamentall...