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The interactivity of
applications poses specific
requirements with
respect
to the Grid infrastructure. These
requirements are addressed by Grid
services developed in CrossGrid.
The Migrating Desktop
and Portal allow users to
have access to
CrossGrid services through the
Roaming Access Server.
Scheduling and submission of user
jobs to Grid resources is performed
by Scheduling Agents. User
interaction is provided by
Interaction Services. The Grid
visualisation Kernel is used to
present previous simulation results.
Grid monitoring services provide
information on both infrastructure
and application execution. Data
access services are used to optimize
the transfer of large data files
from tertiary storage to computing
nodes. The bottom layer is the
fabric, which consists of operating
systems, queuing systems, cluster
management systems and others. This
layer is encapsulated by software
developed within Globus and DataGrid.
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The project is
developing an
international
testbed, that will be able to
support the development of
necessary middleware
and run distributed interactive
applications. Central services
are installed at the Laboratory
of Instrumentation and
Experimental Particle Physics in
Lisbon,
the Help Desk
at IFIC, Valencia
and the central
CVS repository
is
at the Research Centre
at Karlsruhe. The basic software
follows the development carried
out within the DataGrid project.
Sixteen CrossGrid testbed sites,
in Austria,
Cyprus, Greece, Germany,
Ireland,
Poland, Portugal,
the Netherlands, Slovakia and
Spain,
are
already up and running, thus
substantially extending the
European Grid.
For more information about CG
testbed
click here
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International Testbed Organization |
The international testbed is a key component
of the CrossGrid Project, as it will provide the framework to run the
applications in a realistic GRID environment. In particular, organisational
issues and performance and security aspects, including amongst others the
network support, may only be evaluated with the help of a testbed relying on
a high-performance network (which will be provided as the result of the
Gιant project), thereby assuring the participation of an adequate number of
computing and data resources distributed across Europe.
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