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Modélisation NoSQL des entrepôts de données multidimensionnelles massives

Abstract : Decision support systems occupy a large space in companies and large organizations in order to enable analyzes dedicated to decision making. With the advent of big data, the volume of analyzed data reaches critical sizes, challenging conventional approaches to data warehousing, for which current solutions are mainly based on R-OLAP databases. With the emergence of major Web platforms such as Google, Facebook, Twitter, Amazon...etc, many solutions to process big data are developed and called "Not Only SQL". These new approaches are an interesting attempt to build multidimensional data warehouse capable of handling large volumes of data. The questioning of the R-OLAP approach requires revisiting the principles of modeling multidimensional data warehouses.In this manuscript, we proposed implementation processes of multidimensional data warehouses with NoSQL models. We defined four processes for each model; an oriented NoSQL column model and an oriented documents model. Each of these processes fosters a specific treatment. Moreover, the NoSQL context adds complexity to the computation of effective pre-aggregates that are typically set up within the ROLAP context (lattice). We have enlarged our implementations processes to take into account the construction of the lattice in both detained models.As it is difficult to choose a single NoSQL implementation that supports effectively all the applicable treatments, we proposed two translation processes. While the first one concerns intra-models processes, i.e., pass rules from an implementation to another of the same NoSQL logic model, the second process defines the transformation rules of a logic model implementation to another implementation on another logic model.
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https://tel.archives-ouvertes.fr/tel-02057102
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Submitted on : Tuesday, March 5, 2019 - 10:06:06 AM
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  • HAL Id : tel-02057102, version 1

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Mohammed El Malki. Modélisation NoSQL des entrepôts de données multidimensionnelles massives. Modélisation et simulation. Université Toulouse le Mirail - Toulouse II, 2016. Français. ⟨NNT : 2016TOU20139⟩. ⟨tel-02057102⟩

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