1 / 12

Michael Grønager, PhD UNI-C / Virtual Reality Center Present: Niels Bohr Institute

Computational Steering on the GRID Using a 3D model to Interact with a Large Scale Distributed Simulation in Real-Time. Michael Grønager, PhD UNI-C / Virtual Reality Center Present: Niels Bohr Institute. Overview. The GRID in 7 minutes… Computational Steering Examples:

jayden
Download Presentation

Michael Grønager, PhD UNI-C / Virtual Reality Center Present: Niels Bohr Institute

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Computational Steering on the GRIDUsing a 3D model to Interact with a Large Scale DistributedSimulation in Real-Time Michael Grønager, PhD UNI-C / Virtual Reality Center Present: Niels Bohr Institute

  2. Overview • The GRID in 7 minutes… • Computational Steering • Examples: • Interactive Molecular Dynamics • Interactive Fluid Dynamics • OpenLB – an open source Lattice-Boltzmann solver

  3. A quick example • Use Private Certificate to generate a time limited “Proxy” • Log in to the Grid • Define a job: • /bin/echo “Hallo Grid” • (demo) • Wait for completion…

  4. The GRID • What is: “The Grid”?- except for a Buzz word… • Analogy: “The Electrical Power Grid” • The Globus Toolkit

  5. Quoted from globus.org The Grid refers to an infrastructure that enables the integrated, collaborative use of high-end computers, networks, databases, and scientific instruments owned and managed by multiple organizations. Grid applications often involve large amounts of data and/or computing and often require secure resource sharing across organizational boundaries, and are thus not easily handled by today’s Internet and Web infrastructures.

  6. CERN

  7. Storage – Raw recording rate 0.1 – 1 GBytes/sec Accumulating at 5-8 PetaBytes/year 10 PetaBytes of disk Processing – 200,000 of today’s fastest PCs

  8. NorduGrid • A Scandinavianproduction Grid • More than 2200CPUs • More than 30 sites • (Grid monitor demo)

  9. Computational Steering • The ability to interact with a simulated physical model by changing border conditions, parameters or state. • This means: • Fast interaction times < 10s • Intuitive user interface • Physical representation of the data • And to get this we need: • Interactive parallel algorithms • Lots of computers with fast network • A lot of money or… • …resource sharing • The perfect candidate for the GRID!

  10. Example: Interactive Molecular Dynamics • VMD / NAMD 1 ported to GRID environments • … Lets start the job … • Setup: • Client contacts Resource Broker • A worker node (or cluster) is selected to match requirements • Job is submitted • Opens a SSH tunnel back to Client (this Laptop) using Private/Public keys • Starts NAMD • Client starts VMD • Connects to tunneled port • Steering established • 1. See: University of Illinois at Urbana-Champaign: http://www.ks.uiuc.edu

  11. Interactive Fluid Dynamics • Traditional Navier-Stokes solvers not meant for interaction: • Important (manual) preprocessing step building an optimal mesh. • Hard to parallelize • No Open Source code available • The alternative: Lattice-Boltzmann Method • Easy to change border conditions on the fly • Easy to parallelize • No Open Source code available – yet … • … easy to implement • OpenLB • True 3D Lattice Boltzmann solver • Uses ParaView for interaction and data visualization • Uses OpenSceneGraph for Virtual Reality interface • Aim is to run OpenLB interactively on the GRID on more than 1000CPUs

  12. Questions? • Sign up for a hands on Grid tutorial Tuesday the 8th of June 15.30-18.00 at the Niels Bohr Institute.Mail to: mpg@uni-c.dk / waananen@nbi.dk

More Related