The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes, run by an international collaboration of institutes from 9 different countries, is a two 17-meter Cherenkov telescope system located on La Palma (Canary Islands) dedicated to the study of the universe in very high energy gamma-rays. The addition of the second telescope caused the data output of the system to rise up to 300 TB per year of data. The MAGIC data center hosted by the Port d'Informaci— Cient’fica (PIC) in Barcelona is migrating its services to Grid as part of an upgrade needed to deal with the increased data volume. After migrating the data to a Grid filesystem, we have ported the data transfer service. In the last months we have set up an SRM endpoint in the observation site and ported all the data transfer tools to use Grid file transfers.
The computing system in the MAGIC observation site was not initially designed to interact with Grid, and data transfer and publishing to Grid were made through ssh connections and an intermediate system in the data center. In the last months we have installed a new server to publish the data in the observation site through a SRM endpoint, and also ported all our data transfer tools to use this infrastructure. This allowed us to save resources and reduce the complexity of the system. Our initial tests with the new infrastructure also point to a better use of the available bandwidth, which can lead to deprecating the tape-based transfer of raw data.
Conclusions and Future Work
The MAGIC data transfer from the observatory to the data center has been migrated to Grid. This is a further step of the data center into Grid after the migration of the storage, computing and data access services. The next step in this process will be to develop high level analysis tools for users to better use the datacenter services.
|Keywords||MAGIC, Gamma-Ray Astronomy, Cherenkov Telescope, data center, data transfer|
|URL for further information||http://magic.pic.es|