Thursday Morning Meeting 02 November 2017

  • IP:
  • Phone: (434) 817-6524


  • Socorro:
  • CV:
  • Garching:
  • SCO:

News / Meetings / Visitors


  • Successful VLA Data Reduction Workshop (E. Momjian & Socorro colleagues)
  • Feedback user-group on installing CASA from source-code
  • CUC - draft presentation user-liaison attached below

Build, Release

  • First smoke tests on 10.13 Mac. Working on Bamboo integration for a build and test machine.
  • PR Build seems to be doing what it is supposed to. Will run more tests for a week or two before turning off TS3 PR tests.

Verification Testing

  • Received and set up a new Mac Mini
    • Has OSX 10.13 on it (so we have 2 10.13 machines)
    • CASA has been built on 10.13, but is not being routinely built, yet
  • New Mac Pro
    • Order request has been put in to the system, presumably to be approved by Morgan soon
    • Helpdesk has put together a Pegasus 12TB (usable) RAID6 array, with Thunderbolt 2 connection, should be ready for attachment when the Mac Pro arrives (includes about 4 spare hard drives)
  • Pipeline HPC vs serial testing
    • CAS-10857
    • There is a slight difference in spectral channels being selected by either parallel or serial
    • This is significantly changing not just the spectra, but also the cleaning results in the imaging (while results are identical at step 20, they start diverging after that as late as step 26)
    • There are very slight differences in Reference Position in the images (and looks suspiciously like a difference in truncation of reals - take a look at the ticket for details)
    • Remy's take (on the JIRA ticket): "The duplication of processing in the parallel run suggests that you have a threading or flow problem, and end up with two processes doing the same thing and probably colliding, resulting in the very alarming final reported tiny medians and MADS. If true that's a pretty serious bug that you need to understand."
    • Dev Question : According to Andy, at step 20 (hif_makeimages) results are identical, but starting at step 26 (hif_findcont) things look significantly different. Andy - does this mean that the input to hif_findcont is identical in serial/parallel ? If it's happening in findCont, we could ask Todd to take a look too to speed up the debugging (as he's the developer for this code). Also, has anyone looked at what tools Todd's findCont is using, in case there are any differences between operating on a regular image vs a refconcat image ?

Validation Testing

  • Current validation tally
    • 122 Under Validation, 81 Ready to Validate.
    • 5 tickets went RtV this week so far. 4 tickets went through Validation to Resolved this week so far.
    • Oct 20 - 27: 8 tickets assigned for validation. 7 tickets resolved.
  • Current Testing Efforts for 5.2 deliverables
  • Current Testing Efforts for 5.3 deliverables
    • imaging issues/autoboxing refinements
    • statwt2 (CAS-10530)
    • systematic tests of mstransform
    • plone/CASAdocs
    • further parallelization testing (non-ALMA pipeline specific)
    • polarization calibration
    • testing snapshot -- please see for the up-to-date list of tickets and testing status
      • testing ongoing:
        • plotants tickets (Pam, few more)
        • plotms/plotbandpass capability (Pam, CAS-9053)
        • statwt2 (Dave, CAS-10530 and others)
        • imhistory tickets (Dave, several)
        • phase center shift in plotms (CAS-8431)
        • averaging in flagdata (CAS-6215)
        • frequency interpolation of 'linearflag' for BP tables with good solutions (George, CAS-10772)
        • ms tool selectinit (Pam, Sandra, CAS-10818)
        • simulations (Remy, several)
        • ImageCollapser::collapse() should by optimized for degenerate axes (Dave, CAS-9005)
        • Implement ACCOR equivalent (George, Walter, CAS-10366)
        • immath 'poli' and 'pola' implementation (Dave, CAS-9123, CAS-9124)
        • plotcal functionality in plotms (Pam, CAS-8270)



  • Testing
    • MPI buffer error issue in the pipeline seems fixed: CAS-10662
    • ~15 test results for adtitional datasets from cycles 4 and 3 available. Weblogs not transferred, but ready if they're helpful for validation.
  • Other
    • Sandra met the D A R E D developer at ADASS and brought to his attention the way to run CASA and the pipeline in parallel. He had not clue that either CASA or the pipeline could be executed in parallel. During the conference he worked on a prototype to call mpicasa from his scripts, but I don't know if it will be made to a release. Communication is clearly at the lowest level in ALMA.
    • Chatting with Jeff about D A R E D, he confidently said that D A R E D will not be used by NA ARC. Who has the final decision on this????


  • CASA 5.2
    • CAS-10853 : Selection error ( Update from TT ? )
    • CAS-10849 : Restoring Beam in Parallel Cube : Solution being worked on to enable access of refconcated images from a non-parallel tclean run. Will require pipeline to call a separate 'restore-only' tclean with parallel=F at the end of the niter>0 imaging run (done with restoration=False).
    • CAS-10794 / CAS-10418 : Refconcat image analysis inefficiency ( Update from KG ? )
    • CAS-10794 / CAS-10837 : MS open on multi-MS slower ( from KG : yes, but it is as expected when opening/selecting on all subMSs. Also, 2sec to 9sec is still not a show-stopper compared to all other required operations as it's done once per call )

  • CASA 5.3
    • Anyone ?
    • Qn for Juergen : Any changes in what stakeholders want (as per yesterday's meeting) ?

  • What to do with VIVB2 feature/bug tickets? Created CAS-10864 for writing FLOAT_DATA to disk and it was automatically assigned to Ryan. ( Answer for now : Make all new vivb2 issues subtasks of CAS-10292 (vi2 enhancements after initial deployment) ).


  • CASA 5.1. / Pipeline
    • VLA patch may be required, tec_maps / recipes Python issues, plotweather problems
    • Various issues with ALMA D.A.R.E.D. scripts affecting operations and apparently results
  • CASA 5.2 / Pipeline
    • Waiting on CASA input before implementiong common restoring bean handling strategy
    • Waiting on CASA input before implemented virtual concatenated imaging handling strategy
  • CASA 5.3 / Pipeline
    • AQUA report for VLASS and / or VLA, discussions with VLASS
    • Sessions branch testing
    • Display code refactoring


  • CUC presentation coordination

Developer Reports

Thursday Meeting
  • Sanjay Bhatnagar
  • Sandra Castro
  • Lindsey Davis
    • Summarized pipeline view of ALMA Pipeline / Archive / AQUA interactions and set to management
    • Discussion of ALMA D.A.R.E.D. script issues with NAASC
    • Discussions of tclean issues with CASA team
    • Completed initial display code refactoring
    • Tested pipeline sessions branch, works but there are cli build issues
    • Fixed typos in the pipeline task documentation
  • Bjorn Emonts
  • Pam Ford
    • Responded to validation testing questions/reports for CAS-8270 (plotcal in plotms), CAS-10598 (new plotants), CAS-10848 (capitalized items in ms.getdata), and CAS-10822 (multiple plotms windows when dbus connection fails)
  • Enrique Garcia
  • Bob Garwood
    • CAS-10644 - the filler needs to detect duplicates in Pointing and DATA (for WVR). Started work on the Pointing case.
    • CAS-10665 - investigate speed of bdflags2MS. I have identified an interesting case where the flag step is significantly slower than similar ASDMs. This appears to be a resource limit issue (probably memory) for some scans. I'll come back to this ticket and the related asdm2MS slow to fill ticket after I work through a few more concrete tickets (the duplicates, and adding in new tables, and dealing with the new channel based flags).
    • I was out for 2.5 days due to illness.
  • Kumar Golap
  • David Mehringer
  • George Moellenbrock
    • At QUESO meeting last week; gave invited talk on polarization calibration
    • Following up on some polarization cal questions raised by ALMA polarization folks.
    • Finishing PEP
  • Dirk Petry
  • Martin Pokorny
  • Federico M Pouzols
    • Pipeline tests for further datasets for which serial runs are now available in the "cycle 6" spreadsheet from PLWG.
    • Parsing and digesting stats and plots for tclean by size, specmode, gridder, etc. for 5.2 tests.
    • 3 days off
  • Urvashi Rao
  • Darrell Schiebel
  • Ville Suoranta
  • Takahiro Tsutsumi
    • automasking - continued to work on code speed-up now looking at ‘grow mask’ step. In particular, I am modifying a number of grow iterations to be performed to be dynamically controlled (CAS-10745)
    • automasking discussion: heard a nice presentation by A. Kepley
    • Started looking into the parallel tclean selectData issue (CAS-10853)
Friday NAOJ Meeting
  • Kanako Sugimoto
  • Wataru Kawasaki
  • Takeshi Nakazato
  • Renaud Miel
-- AndyHale - 2017-11-01
Topic attachments
I Attachment Action Size Date Who Comment
CUC_2017_UserLiaison_PRELMINARY.pdfpdf CUC_2017_UserLiaison_PRELMINARY.pdf manage 7 MB 2017-11-02 - 09:12 BjornEmonts Preliminary draft CUC presentation User Liaison
Topic revision: r16 - 2017-11-03, TakTsutsumi
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