Abstract
In 2012, 14 Italian Institutions participating LHC Experiments (10 in CMS) have won a grant from the Italian Ministry of Research (MIUR), to optimize Analysis activities and in general the Tier2/Tier3 infrastructure. A large range of activities is actively carried on: they cover data distribution over WAN, dynamic provisioning for both scheduled and interactive processing, design and development of tools for distributed data analysis, and tests on the porting of CMS software stack to new highly performing / low power architectures.
Highlights
The Italian Institute for Nuclear Physics (INFN) finances the participation of Italian institutions to the four LHC experiments, from research & development to maintenance
We describe in this paper the development lines that are actively pursued, with the expected results
Our Tier1, CNAF, is active part of the federation, and its storage is served via a special Xrootd configuration: in order not to expose its tape backend to Xrootd, a specific plugin was prepared, tested and put into production to allow masking of GPFS[4] files only residing on the tape backend
Summary
2. Towards an Italian Xrootd Federation The Computing infrastructure CMS has in Italy is based on a large multi-experiment Tier1 (at CNAF, Bologna), 4 large Tier2s (Bari, Legnaro, Pisa, Roma Sapienza) and a number of small Tier3s, mostly financed outside INFN budget (Trieste, Torino, Bologna, Perugia, Catania, Napoli). CMS has decided to use Xrootd[3] as the protocol for geographical data access. Our Tier1, CNAF, is active part of the federation, and its storage is served via a special Xrootd configuration: in order not to expose its tape backend to Xrootd, a specific plugin was prepared, tested and put into production to allow masking of GPFS[4] files only residing on the tape backend.
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