Poster – Paper 489
In the last years, scalable RDF stores in the cloud have been developed increasing the complexity of RDF stores running on a single computer. In order to gain a deeper understanding how, e.g., the data placement or the distributed query execution strategies affect the performance, we have developed the modular glass box profiling system Koral. With its help, its possible to test the behaviour of already existing or newly created strategies tackling the challenges caused by the distribution in a realistic distributed RDF store. Thereby, the design goal of Koral is that only the evaluated component needs to be exchanged and the adaptation of other components is aimed to be minimal. The wide variety of measurements allow for an in-depth investigation of the performance.