1 / 16

CASA Progress and Status

CASA Progress and Status. ANASAC Face-to-Face Sept 16-17, 2013. Jeff Kern. CASA Team Lead. CASA Status. CASA is in routine use at ALMA and the VLA for daily operations. Many other observatories are also using CASA 25% of NRAO CASA Helpdesk tickets are for non-NRAO telescopes

jadzia
Télécharger la présentation

CASA Progress and Status

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. CASA Progress and Status ANASAC Face-to-Face Sept 16-17, 2013 • Jeff Kern • CASA Team Lead

  2. CASA Status CASA is in routine use at ALMA and the VLA for daily operations. Many other observatories are also using CASA 25% of NRAO CASA Helpdesk tickets are for non-NRAO telescopes Improvement in performance, ease of use, and robustness are being addressed as well as the development of additional features. Reviewed in March: Report and response available: https://safe.nrao.edu/wiki/bin/view/Software/CASA/WebHome Summary: Remain focused on VLA and ALMA needs Improve fundamentals of software engineering process ANASAC Face-to-Face: Sept. 16,17 2013

  3. Organization Changes • In the process of organizing a new CASA Users Committee to solicit input from a wider segment of the CASA users community. • Details still in progress • Designed to complement the CASA Science Steering Committee (CSSC) not replace. • We are working closely with Science User Support (SUS) to do scientific validation of new CASA features prior to release. • Bi-weekly meeting to review test targets, status and assignments • DMSG has added a software testing group focused on ALMA testing, including CASA: • Focused on improving automated software testing, not validation.

  4. CASA Usage • CASA Releases are downloaded around 2000 times per release • Widely distributed download sites • Weak preference for ALMA partners

  5. Performance • CASA performance for most tasks is comparable with other packages. • Historical reputation for performance issues still linger. • Are some known poorly performing capabilities (plotting) • Parallel CASA has been demonstrated to significantly improve performance. • User interface issues / learning curve have prevented wide acceptance • Moving from home grown cluster management to MPI • Working with Scientific Computing Infrastructure group to benchmark pipelines and identify performance bottlenecks. • MSTransform task introduced: • Allows multiple actions on data with a single read from disk. • Consolidates duplicate code to single maintainable framework.

  6. Performance: Data Access (Disk I/O) • Unlike many other aspects of the processing equation, time alone will not solve the data access problem.

  7. Performance Comparison • Very simple imaging to try to minimize package variations • All tests run on Socorro cluster node against Lustre • 4000 X 4000 pixels • 3000 Components • No Boxing • 0.5 arcsec • Number of Terms = 1 • Single pointing • No Widefield • No A-Term • Briggs weighting 0 • Time to Image ~200 GB data set: CASA Review March 5-6. 2013

  8. Performance Comparison All times in Minutes CASA Review March 5-6. 2013

  9. Infrastructure Initiatives • Continued effort on Parallelization, focused on delivery of capabilities to end users/ • MSTransform to standardize I/O and decrease overall I/O volume • Imager Update • Major re-architecting to improve interface, normalize options, support for new algorithms, regularization. • Region Format: Unification and improvement across the package. • Tool Documentation: Image tool is current focus, starting to work our way through the package. • Imregrid: Major rework for more intuitive operation. • SetJy: Reorganized for more clarity in options, scriptability (pipeline), and improved capabilities.

  10. Recent Developments • Support for Linear Polarized Feeds (Required for ALMA Cycle-2) • Support for rapidly moving objects (Ephemeris Objects) throughout package • Simulation update in support of Cycle-2 CFP • Improved primary beam handling • Summer student Kara Kundert has extended her project to understand the effects of heterogeneous primary beams on image dynamic range. • Single Dish: • Introduction of CalTable like interface (Pipeline Support) • Performance Improvements • Feathering: Capability is undergoing continued enhancements

  11. CASA Viewer • Many improvements in the CASA viewer • Histogram generation and fitting • Spectral line display and fitting • Position-Velocity Curves • Interface improvements

  12. CASA ViewerPrimary View

  13. CASA Viewer:Spectral Line Fitting

  14. CASA ViewerHistogram fitting

  15. ALMA Development Program • CASA was very active in the ALMA Development program • Studies: • NRAO PI: Interoperability of AstroPy and CASA • Projects: • NRAO PI: [Sub-]Millimeter VLBI support in CASA • NRAO PI: Extended On Demand Computing • CASA Execution in external environments XSEDE • NRAO CO-I: Post imaging Analytics • Development of “value added” products for the pipeline • NRAO CO-I: Next Generation Viewer • Collaborating on a Tera-Pixel viewer

  16. The National Radio Astronomy Observatory is a facility of the National Science Foundationoperated under cooperative agreement by Associated Universities, Inc. www.nrao.edu • science.nrao.edu

More Related