VERCE Newsletter 3

Spring 2014
Issue 3
Introduction to the Forward Modelling Demo
Lion Krischer & Heiner Igel
Department of Earth and Environmental Sciences, Geophysics, Munich University
• VERCE deliverables
are available at:
http://www.verce.eu/Repository/Deliverables.php
• EPOS latest Newsletter is available at:
http://www.epos-eu.org/
newsletter/
• The next VERCE
Training will take place
16th to 18th June 2014 in
Liverpool.
- Introduction to theVERCE
infrastructure;
- General overview of the
platform;
- Using theVERCE platform;
- Practical session & use case
with the L’Aquilla aftershocks
sequence;
- Innovating with theVERCE
platform using DisPy.
• The 15th European
Conference on Earthquake Engineering
(EAEE) and the 34th
General Assembly of
the European Seismological Commission
(ESC) will be organized
in Istanbul during 24-29
August 2014. http://
www.2eceesistanbul.org/
• EGU 2014 - ESSI
2.8 - Earth science
on Cloud, HPC and
Grid: The VERCE Science
Gateway: enabling user
friendly seismic waves
simulations across European HPC infrastructures
(Thu, 01 May, 11:30 11:45 - Room G1)
VERCE Poster:
Attendance Wed, 30 April,
17:30-19:00 / Red
Posters
Numerical modelling of seismic waves in realistic three-dimensional media has become an
indispensable tool for modern seismology at all
scales. The co-evolving advances in wave propagation theory and
computational power in
the last decades enable
simulations across the
observable frequency
band. Applications are
numerous and range
from synthetic experiments exploring vast
parameter spaces to
large scale inverse problems for structure and
source leading to improved quantitative seismic
hazard estimations.
Nowadays advanced programs to simulate seismic waveforms are available but practical issues
still exist. Amongst these are the installation and
execution of the codes on high performance
computers, which differs for each machine, mesh
and velocity model generation in a suitable format, and the creation of the input files to steer
the different solvers. All
of these are problems
that a scientist should
not be concerned with
and they oftentimes
create a considerable
barrier for entrance
and reduce the time of
actual research.
The forward modelling
demo shows an example of the VERCE scientific gateway to perform forward wave simulations
with SPECFEM. Seismologists can use it to create
earthquake scenarios with an intuitive interface
and simulate them by simply pressing a button.
The Infrastructure Provider’s Perspective
Cerlane Leong & Anton Frank
Leibniz Supercomputing Centre
Seismological use cases like the one presented
above demand huge computing power and
hence the involvement of top level supercomputers. In VERCE, the Leibniz Supercomputing
Centre (LRZ) in Munich will make available such
resources to the seismologists via the VERCE
Science Gateway. This gateway hides IT issues,
like hardware architecture, schedulers or compilers, so that the scientists can fully concentrate
on their research questions. The software portfolio provided through the Science Gateway includes highly optimized versions of seismic wave
propagation codes like SPECFEM3D and SeisSol,
which has just recently been used to achieve a
new computational record1.
LRZ’s supercomputing resources integrated in
the VERCE infrastructure are the 9400-core Linux cluster and SuperMUC, one of the fastest
supercomputers in Europe. To keep up with the
ever increasing computational demands, SuperMUC is frequently extended by the latest hardware. SuperMIC, a new cluster of Intel Xeon Phi
Coprocessors is currently added and expected
to start user-operation in mid-2014. In the near
future, researchers will be able to rely on even
more HPC resources: Both, the PLX and the
Fermi supercomputers at Italy’s national supercomputing centre CINECA will be integrated in
the infrastructure as well.
1.-http://www.tum.de/en/about-tum/news/press-releases/short/
article/31478/
Project coordinator: J. -P.Vilotte (IPGP-CNRS)
Contact: [email protected]ce.eu
http://www.verce.eu
Spring 2014
Issue 3
The VERCE Science Gateway: User Friendly Forward
Modeling across European HPC infrastructures.
Alessandro Spinuso & Jonas Matser
R&D department, KNMI
The VERCE Science Gateway has reached its beta
release (http://portal.verce.eu) offering to the community a tool for Seismic Forward Modeling. The integration of the computational and data-management com-
ponents of the VERCE platform required a very specific
and dedicated effort. We can group the functionalities
of the Forward Modeling application into five main
sections.
Simulation solver selection and configuration:
Allows the configuration of the solver input parameters.
Meshes and velocity models can be also submitted for
their use via the portal.
Earthquakes and stations selection: Earthquakes
and stations can be selected in two different modes,
via file upload or by querying the FDSN webservices
directly.
Workflow submission and control: Users can give
their runs names and descriptions and monitor their
execution.
Provenance and results visualisation: Users can
examine and validate their simulations by exploring the
information related to the processes and the data products involved in the computation.
Access to data management resources: The gateway offers interactive access to the users’ data products stored into the VERCE iRODS federation.
The details of the infrastructure and the security policies challenged the development team in achieving the
interactive and user friendly exploitation of the EGI
and PRACE resources. This was fostered by the established partnership with the SCI-BUS project*, which
allowed us to delegate a number of tasks concerning
workflow, jobs and security management, to the gUSE/
WS-PGRADE framework.
* http://www.sci-bus.eu
Project coordinator: J. -P.Vilotte (IPGP-CNRS)
Contact: [email protected]
http://www.verce.eu