Distributed Storage for Communities
Two data management systems to store distributed data -- dCache and iRODS -- are available.
dCache is a disk pool management system with a SRM interface, jointly developed by DESY and Fermilab. It provides access to data by an uniform filesystem that can be distributed over serveral servers. One of the advantages of using dCache to manage storage resources is that it can act as a front end disk cache behind which sits some hierarchical storage system, such as a tape robot.
iRODS (Integrated Rule-Oriented Data System), is a data grid software system developed by the Data Intensive Cyber Environments research group and collaborators. The iRODS system is based on expertise gained through a decade of applying the SRB technology in support of Data Grids, Digital Libraries, Persistent Archives, and Real-time Data Systems.
These systems are used by three user communities
The first dCache-System at the Forschungszentrum Jülich GmbH is used by the ILDG (International Lattice Data-Grid) group for storing and analysis of QCD simulation data.
The second dCache-System is part of the LOFAR Long term Archive System. LOFAR is a real-time multiple sensor array which aims to force a breakthrough in sensitivity for astronomical observations at radio-frequencies below 250 MHz. It is being developed by a consortium of institutes, universities and industrial parties, led by ASTRON. The participating German institutes are organized in the GLOW Consortium.
The EUDAT vision is to support a Collaborative Data Infrastructure which will allow researchers to share data within and between communities and enable them to carry out their research effectively. EUDAT aims to provide a solution that will be affordable, trustworthy, robust, persistent and easy to use. JSC is one of the EUDAT data centres and will offer a commutity store realized by iRODS. For more information see the research project EUDAT.