| Grant number: | 18/22277-8 |
| Support Opportunities: | Regular Research Grants |
| Start date: | February 01, 2019 |
| End date: | April 30, 2021 |
| Field of knowledge: | Physical Sciences and Mathematics - Computer Science - Computing Methodologies and Techniques |
| Principal Investigator: | Cristina Dutra de Aguiar |
| Grantee: | Cristina Dutra de Aguiar |
| Host Institution: | Instituto de Ciências Matemáticas e de Computação (ICMC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| City of the host institution: | São Carlos |
Abstract
Processing OLAP (on-line analytical processing) queries is very expensive because of the huge volume of data stored in the data warehouse and the fact that they perform star-join. Processing SOLAP queries is even more expensive, since spatial data warehouses are more voluminous and perform the star-join extended with costly topological predicates. The processing of OLAP and SOLAP queries can be benefited by the use of computational environments with large storage and processing capacities. In these environments, it is common the use of parallel and distributed programming paradigms, such as the Apache Hadoop MapReduce and the Apache Spark frameworks. Recently, these frameworks have been extended by DSDMSs (distributed spatial data management systems), which aim to store, index, and process huge volumes of spatial data (e.g.: SpatialHadoop e SpatialSpark). This research project is aimed to propose solutions for the efficient processing of OLAP and SOLAP queries on parallel and distributed environments. Its specific objectives are: (i) the star-join processing considering slice and dice queries with low selectivity; (ii) the star-join processing considering drill-down, roll-up, and drill-across queries with high and low selectivity; (iii) a comparative analyses of DSDMSs available in the literature; and (iv) the star-join processing extended with topological predicates, using as a basis functionalities provided by DSDMSs. (AU)
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