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Work packages

AstroGrid-D (German Astronomy Community Grid, GACG) is composed of multiple hardware and software components (see Figure 1 - Architecture).

The research and development process for AstroGrid-D is split into eight work packages (WP).

Design of the German Astronomy Community Grid
WP-0 Project management
WP-0 coordinates the project work and progress, organizes workshops and synchronizes the architecture with respect to the other community projects and to the D-GRID integration project.

WP-I Integration of compute and data resources into GACG
This workpackage is dedicated to the integration of resources into the GACG infrastructure. Hardware resources like e.g. PC clusters or robotic telescopes and soft(ware) resources like e.g. data and services will be assimilated. A support team will be formed to assist system administrators.

WP-II Provision and management of metadata
Metadata describe static as well as dynamic properties of the managed resources. Metadata are required e.g. for job allocation or efficient data transfer.

WP-III Distributed data management
Analysis applications use data stored in files or in databases (cf. WP-IV). Workpackage III will provide an efficient and distributed management of these data.

WP-IV Distributed database access and data stream management
Besides being stored in files, data can also reside in databases or come from sensors and other instruments as continuous streams. The efficient, distributed processing of such kind of data in the grid is the task of this work package.

WP-V Job-oriented grid resource management
A grid job might be a simple process in an analysis chain, a distributed simulation or an astronomical observation using a robotic telescope. Work package V develops services to cover these case scenarios. For example, distributed simulations shall be efficiently performed by reservation of grid resources.

This workpackage provides mechanisms to monitor and to interactively steer grid jobs. For comparison, parameters of certain locally running applications can be changed during runtime. Proper interfaces will be developed to provide similar steering capabilities for grid jobs.
Building on GridSphere, a user-friendly graphical interface will be developed within this work package. The accessibility of community-specific services of other D-GRID projects and the integration of their resources (by abstraction of resource managing services) will be simplified by using the Grid Application Toolkit (GAT) as an integration layer (cf. Fig. 1).