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)