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AstroGrid-D DataManagement (ADM)

The AstroGrid-D Data Management (ADM) provides a virtual filesystem and simultaneously cares for the placement of the corresponding physical files on one or more storage facilities.

ADM uses a relational database, namely PostgreSQL, to store a unique descriptor, i. e. a Logical File Identifier (LFID) for each file, as well as meaningful or typical meta data for each file or directory, e. g. the owner and a timestamp to log when the entry has been registered with the filesystem. Whereas file ownership and creation timestamp are mandatory meta data and ADM transparently cares for their maintenance, individual files can be endowed with user-defined properties. ADM provides the command line client adm, including a C-library, which offers an easy-to-use access to the stored files. Furthermore, ADM ships with a web interface which permits to browse the virtual filesystem graphically.

The following pages are dedicated to guide AstroGrid-D users through the usage of the command line interface to the AstroGrid-D Data Management.

AstroGrid-D Data Management Tutorial (PDF)