An Object Oriented approach to the Data Management for the Argo-YBJ experiment

The Argo-YBJ detector will be able to continuously monitor the sky with a low threshold, an high duty cycle and a large solid angle. The experimental and Monte Carlo data flow will be some orders of magnitude larger than the data flow of the past experiments and it requires a strong computational effort to face out the management, the reconstruction and the distribution of the data for the end user analysis. In the paper an Object Oriented framework for the data management based on Object Oriented Database (Objectivity) and on the ROOT package will be presented. Hundreds thousands events were stored in order to test the performance and the flexibility of the model.