CMS Computing Operations at INFN-CNAF with Castor and StoRM Storage Systems

INFN-CNAF is one of 7 national level Tier–1 centers playing a key role in the management and distribution of the CMS experiment data. During the last years, leveraging on the feedback of various challenges, a great effort was spent in defining and commissioning INFN-CNAF services and operations in order to best support CMS activities. In particular, an hybrid system based on Castor and StoRM/GPFS storage technologies was deployed and widely tested. This note describes the setup of these services and the results of the most recent tests.