22–26 Sept 2008
Harbiye Askeri Museum
Europe/Zurich timezone

The AMGA Metadata Catalogue: New developments

23 Sept 2008, 16:46
Harbiye Askeri Museum

Harbiye Askeri Museum

Istanbul
Poster Poster Demos and Posters

Describe the activity, tool or service using or enhancing the EGEE infrastructure or results. A high-level description is needed here (Neither a detailed specialist report nor a list of references is required).

AMGA is the gLite Metadata catalogue. We present the latest
developments, which have been done following the requests of the EGEE
user community. The first is the addition of a WS-DAIR compatible
interface, which allows a seamless integration of AMGA into the DAIS
framework of OGF standardized Grid Data Access Services. The second
major development is the addition of support for native SQL queries.

Describe the added value of the grid for your activity, or the value your tool or service adds for other grid users. This should include the scale of the activity and of the potential user community, and the relevance for other scientific or business applications.

AMGA has been essential to porting applications to the Grid, which
need metadata or relational DB access. The native SQL support
greatly eases the work needed to port existing SQL-based database
applications to the Grid using AMGA because no need to reformulate
the queries in AMGA's metadata query language are necessary. Of
course this metadata query language is also still provided by AMGA.
Both new developments make full
use of the advanced security features of AMGA, namely schema ACLs and
access through GSI. In particular biomedical applications with
often complex relational database use will profit from this
combination of SQL and strict ACL based security, which is unique
to Grid-enabled database access.

Report on the impact of the activity, tool or service. This should include a description of how grid technology enabled or enhanced the result, or how you have enabled or enhanced the infrastructure for other users.

The native SQL support has been much requested by the EGEE user
community in order to ease the effort to port existing applications
to the Grid, because the need to learn the Grid metadata query
language of AMGA ceases to exist. With the removal of this
obstacle, we expect to significantly lower the threshold for new
applications to be adapted to the Grid. The addition of a WS-DAIR
compatible interface will however greatly improve interoperability
to other Grid applications and services. The adoption of this
standard also allows the EGEE community to provide feedback on the
standard and make suggestions for its evolution. We will present
our experiences on implementing WS-DAIR and some performance
measurements.

Primary authors

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