Dakota, developed at Sandia National Laboratories, is a software toolkit that provides an interface between computational models and a library of iterative systems analysis methods. Dakota helps answer questions such as:
- What are the most influential parameters in my model? → sensitivity analysis
- How robust and reliable is my model? → uncertainty quantification
- What is the best performing design? → optimization
- What model parameter values best match experimental data? → calibration
Dakota has an extensive library of analysis techniques, including:
- parameter studies
- design of experiments
- design of computer experiments (DACE)
- sampling (MC or LHS)
- local and global reliability
- adaptive sampling
- stochastic expansion
- epistemic methods
- gradient-based local and global optimization
- derivative-free local and global optimization
- nonlinear least squares
- surrogate models
Setting up Dakota on beach
Dakota 6.1 is installed on the CSDMS HPCC, beach.colorado.edu. To use Dakota on beach, you'll need to modify your user environment. (This only needs to be done once.)
In your favorite text editor,
(located in your home directory)
and add the following lines to the bottom of the file:
PATH=$PATH:/usr/local/dakota/bin:/usr/local/dakota/test export LD_LIBRARY_PATH=/usr/local/dakota/bin:/usr/local/dakota/lib
Save the file, logoff from beach, then login again. Dakota will now be available for use. Check with:
$ dakota --version Dakota version 6.1 released Nov 15 2014. Subversion revision 2951 built Nov 7 2014 09:52:09.
If you encounter any problems in setting up Dakota on beach, please email the CSDMS software engineers at CSDMSsupport@colorado.edu.
Using Dakota on beach
Topics to address:
- Link to HPCC rules
- At minimum, use
qsub -Ifor a single-processor job
- A simple example -- use Greg's, with the
- Best practice: copy inputs to compute node (using /state/partition1), perform Dakota experiment, delete inputs, move results back to home directory, or to /scratch if space is an issue.
- Running Dakota in parallel with MPI
If you encounter any problems in using Dakota on beach, please email the CSDMS software engineers at CSDMSsupport@colorado.edu.
- The Dakota home page is https://dakota.sandia.gov
- The Dakota 6.5 (released November 2016) documentation is available at https://dakota.sandia.gov//sites/default/files/docs/6.5/html-ref/index.html
- Adam Stephens and Laura Swiler, members of the Dakota development team at Sandia, gave a clinic at the 2014 CSDMS Annual Meeting which included a detailed discussion of sensitivity analysis, uncertainty quantification, and calibration in Dakota. Their presentation (PDF) is here.
- Building Dakota on Ubuntu 12.04 LTS
- The CSDMS Dakota Interface, Dakotathon
A list of topics that should be addressed in this page. Or linked to.
- Why Dakota? Talk about about the need for UQ in modeling, and how Dakota provides a framework to help.
- An overview of how Dakota works. Write this up in a more digestible manner than the way it's presented in the Dakota documentation.
- A simple example of using Dakota; e.g., Greg's. (Make this another transcluded page.)
- Installing and running Dakota on a personal computer
Setting up Dakota on beach Using Dakota on beach