infso-ri-508833 enabling grids for e-science running ecce on egee clusters olav vahtras kth
TRANSCRIPT
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INFSO-RI-508833
Enabling Grids for E-sciencE
www.eu-egee.org
Running ECCE on EGEE clusters
Olav Vahtras
KTH
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ECCE
• Extensible Computational Chemistry Environment– A complete environment for
defining, submitting, storing and analyzyng computational chemistry calculations GUI Compute servers Data servers
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About ECCE
• Developed by PNNL• Supported on Linux, SGI, Sun• Free of use for academic users• Support for NWChem, Gaussian• Written in C++• X Windows Motif toolkit• OPENGL graphics
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Main panel
• Organizer• Builder• Viewer• Machine browser• Periodic table
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Organizer
• Organizer summarizes projects and calculations in a “file manager” view
• Information is stored on a data server (apache server with a Web-DAV) interface
• Color-coded status of calculations (ready, running, finished, error)
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Builder
• Builder: compose molecular system from atoms or molecular building blocks from the Structure library
• Initial structure from simple molecular mechanics or user input
• Gaussian and NWChem calculations can be imported
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Editor
• Define charge, multiplicity basis set
• Choose basis set from a basis set library
• Define method (HF, DFT)• View generated input file• Launch calculation
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Basis set library
• Choose basis set for all atoms or different basis set for different atom types
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Launcher
• Select machine where the calculation is to run
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Viewer
• Graphical presentation of final result
• Geometry• Forces• Electron density• Orbitals• Convergence graph
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Example
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New project
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Water
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New calculation
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Geometry optimization
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Editor
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Builder
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Oxygen
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Add hydrogens
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Editor
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Basis set library
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View input file
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Launch
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Running job
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Finished job
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View density
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View HOMO
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ECCE on grids
• Tasks– Make ECCE talk to g-lite
Submitting Monitoring
• Job status
• Job progress Retrieving
– Options Text configuration files Perl communication scripts
• All work in progress
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• Summary– A chemists “project management” software– ECCE GUI hides details from the user– Collects results from a variety of computational resources in a
single database– ECCE has a high pedagogical value for students of chemistry– Lower threshold for computational chemists to turn to grid
resources
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Acknowledgment
• Acknowledgement– Gary Black, PNNL