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Active developmentActive development
Topics: Remote Visualization Remote Steering Remote Offline Visualization Simulation Portal Collaboratory Tools
Groups: German DFN-Verein Gigabit project for exploiting high speed
networks (TIKSL) USA NSF KDI project to develop collaboratory tools for astrophysics
around Cactus (ASC) And others ...
Remote VisualizationRemote Visualization
IsoSurfaces and Geodesics
Contour plots(download)
Grid FunctionsStreaming
HDF5
Amira
Amira
LCA Vision
OpenDX
Remote VisualizationRemote Visualization
Streaming data from Cactus simulation to viz client Clients: OpenDX, Amira, LCA Vision
Protocols Proprietary:
– Isosurfaces, geodesics HTTP:
– Parameters, xgraph data, JPegs Streaming HDF5:
– HDF5 provides downsampling and hyperslabbing
– all above data, and all possible HDF5 data (e.g. 2D/3D)
– two different technologies• Streaming Virtual File Driver (I/O rerouted over network stream)• XML-wrapper (HDF5 calls wrapped and translated into XML)
Remote Visualization (2)Remote Visualization (2)
Clients Proprietary:
– Amira HTTP:
– Any browser (+ xgraph helper application) HDF5:
– Any HDF5 aware application • h5dump• Amira• OpenDX• LCA Vision (soon)
XML:– Any XML aware application
• Perl/Tk GUI• Future browsers (need XSL-Stylesheets)
Remote Visualizion - IssuesRemote Visualizion - Issues
Parallel streaming Cactus can do this, but readers not yet available on the client side
Handling of port numbers clients currently have no method for finding the port number that
Cactus is using for streaming development of external meta-data server needed (ASC/TIKSL)
Generic protocols Data server
Cactus should pass data to a separate server that will handle multiple clients without interfering with simulation
TIKSL provides middleware (streaming HDF5) to implement this
Output parameters for each client
Remote SteeringRemote Steering
Remote Viz data
Remote Viz data
XML HTTP
HDF5
Amira
Any Viz Client
Remote SteeringRemote Steering
Stream parameters from Cactus simulation to remote client, which changes parameters (GUI, command line, viz tool), and streams them back to Cactus where they change the state of the simulation.
Cactus has a special STEERABLE tag for parameters, indicating it makes sense to change them during a simulation, and there is support for them to be changed.
Example: IO parameters, frequency, fields Current protocols:
XML (HDF5) to standalone GUI HDF5 to viz tools (Amira) HTTP to Web browser (HTML forms)
Remote Steering - IssuesRemote Steering - Issues
Same kinds of problems as remote visualization generic protocols handling of port numbers broadcasting of active Cactus simulations
Security Logins Who can change parameters?
Lots of issues still to resolve ...
Remote Offline VisualizationRemote Offline VisualizationViz Client (Amira)
HDF5 VFD
DataGrid (Globus)
DPSS FTP HTTP
VisualizationClient
DPSS Server
FTP Server
Web Server Remote
Data Server
Downsampling, hyperslabs
Viz in Berlin
4TB at NCSA
Only what is needed
Remote Offline VisualizationRemote Offline Visualization
Accessing remote data for local visualization
Should allow downsampling, hyperslabbing, etc. Access via DPSS is working (TIKSL) Waiting for DataGrid support for HTTP and FTP to remove
dependency on the DPSS file systems.
Grand PictureGrand PictureRemote steering and monitoring
from airport
Origin: NCSA
Remote Viz in St Louis
T3E: Garching
Simulations launched from Cactus PortalGrid enabled
Cactus runs on distributed machines
Remote Viz and steering from Berlin
Viz of data from previous simulations in
SF café
DataGrid/DPSSDownsampling
Globus
http
HDF5
IsoSurfaces
More InformationMore Information
Web pages: Cactus:
– http://www.CactusCode.org DFN:
– http://www.zib.de/Visual/projects/TIKSL ASC:
– http://wugrav.wustl.edu/ASC/mainframe.html
Contact: [email protected]
