Before joining Orchestra Networks, I was a postdoctoral researcher at INRIA Saclay, in France, working on scalable algorithms for Cloud-based Semantic Web data management. I obtained my doctorate degree from INRIA Saclay, and Université Paris-Sud, again working on the broad domain of data management, focusing on query optimization of massively parallel frameworks. Prior to that, I was a member of Information Systems Laboratory of FORTH-ICS, in Greece, where I emphasized on graph exploration and visualization algorithms.
As a member of the core engine team of the R&D department of Orchestra Networks, I am working on the efficient management of versioned data. The core of our product, EBX, consists in a semantic datastore with many features such as:
- a rich data model allowing to express complex constraints, relationships, and permission rules;
- advanced data versioning and inheritance capabilities;
- ACID transactions;
tabular & hierarchical (OLAP style) views;
- synchronous & asynchronous data validation.
In order to provide all these features without deteriorating the performance of the system or impacting the infrastructure requirements, our team needs to constantly study the state-of-the-art research and develop innovative solutions on many domains of data management; in particular those related with temporal access methods, join ordering, view-based rewriting, efficient query evaluation and storage.
My current interests involve temporal access methods and query optimization under constraints.