Processing large volumes of RDF data requires sophisticated tools. In recent years, much effort was spent on optimizing native RDF stores and on repurposing relational query engines for large-scale RDF processing. Concurrently, a number of new data management systems— regrouped under the NoSQL (for “not only SQL”) umbrella—rapidly rose to prominence and represent today a popular alternative to ...

NoSQL applications often use denormalized databases in order to meet performance goals, but this introduces complications. In particular, application evolution may demand changes in the underlying database, which may in turn require further application revisions. The NoSQL DBMS itself can do little to aid in this process, as it has no understanding of application-level denormalization. In this ...

The aim of this work is to understand more closely where the border lies between relational and Not Only Structured Query Language (NoSQL) platform as concerns Enterprise Content Management (ECM) area. Another objective (closely related to the first one) is to specify the conceptual architecture of the distributed ECM system. The authors specify the model of the prototype ECM system and compare...

Nowadays, NoSQL databases [1-3] are being used in several emerging application fields (including social network management, e-health and e-government systems, big-science projects) to store data with unconventional types, and specifically big data [4-6]. Furthermore, those are live application domains where the evolution of the stored NoSQL data and of their structure has to keep the pace of th...

To the best of our knowledge, there is no generic mapping from conceptual schemas to NoSQL physical schemas. This paper tackles such problem in the context of geographic databases. We discuss the solution of mapping conceptual schemas to hybrid relational/NoSQL physical schemas. Resumo. Até onde pudemos determinar, não existem ainda propostas genéricas para produzir esquemas fı́sicos para estrut...

Over the years, NoSQL Database Management Systems (DBMS) have been adopted as an alternative to the constraints of relational/SQL DBMSs. In order to demonstrate their feasibility, works have evaluated NoSQL DBMSs regarding some performance metrics, but energy consumption has not been assessed. Indeed, energy consumption is an issue that should not be neglected due to the rise of energy costs an...

New requirements are arising in environments where we have higher volumes of data with high operation rates, agile development and cloud computing. In recent years, a growing number of companies have adopted various types of nonrelational database, commonly referred to as NoSQL database. This reflects the growing interactivity of applications which are becoming more networked and social, drivin...