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Free keywords:
Grid-Computing; e-Science
Abstract:
In energy meteorology research, scientists from several domains such as
physics, meteorology and electrical engineering work together to obtain
information needed to characterize energy production from regenerative
energy sources such as wind and solar power. For this purpose,
several scientific applications were developed to process large data sets
from heterogenous data sources in complex and sometimes long-running
process chains. In our project WISENT a Grid infrastructure is created
to speed up execution of these applications and to ease access to
computational and data resources. To achieve this goal, Grid software
such as Globus Toolkit and Condor is employed to connect the existing
resources of each project partner. But this ongoing process is hindered
by blocking firewalls due to strong security policies and by the use of
network address translation (NAT). In this paper we describe the current
Grid architecture and focus on problems that occurred due to the
use of firewalls and NAT. We contribute our present solutions and also
discuss alternative solution ideas. One solution using the so-called “hole
punching” technology is described in more detail.
