Users May 2017

users@lists.einsteintoolkit.org

20 participants
33 discussions

Error about a shared object file
by Hiro.Kig 03 May '17

03 May '17

Dear all I am Hiromitsu Kigure. This is the first time I send an e-mail to this mailing list. I am sending you this email to seek your advice. I use Einstein Toolkit in the following situation. ・OS:Fedora23 ・Executable:etilgrmhd (IllinoisGRMHD) The compile was done and executable file was made. However the following error message was displayed when execute the file. "error while loading shared libraries: libgsl.so.19: cannot open shared object file: No such file or directory" There was no problem few weeks ago. So I don't have any idea why the error occured. What should I do? ・Update the OS? ・Update the IllinoisGRMHD? (I don't use the latest version) I would appreciate it if you would give me some advice. Thank you, Best regards.

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minutes on ET workshop and school at NCSA discussion of 2017-05-01
by Roland Haas 01 May '17

01 May '17

Hello all, Present: (at least) Pablo, Frank, Gabrielle, Eloisa, Roland, Ian, Qian, Manuela, Erik Dates: 5 days during either the week of July 24th or week of July 31st Poll: please indicate your preferred dates by checking at least 5 consecutive days in in this doodle poll (Mo starting times will be prioritized, you can use ifneedsbe for secondary choices): http://doodle.com/poll/p7deb9npmgwwfbmv Please respond no later than *Thursday* as well will finalize room bookings for the lecture halls on Friday. If you would like to serve as an instructor/TA please let us (Roland Haas, Eliu Huerta, Gabrielle Allen or just list) know as well. Summary ------- Dates; 5 days of school (3 days) and developer workshop (2 days), during weeks of July 24th or July 31st Location: NCSA/UIUC, Urbana, IL, US target audience: students interested in numerical relativity in general and students working in groups that use the ET topics: * keep it hands on, provide theory enough to understand what the ET implements, eg 3+1 decomposition but not full derivation of BSSNOK formalism, similar for hydrodynamics * aim to teach students how to run the ET, make simple additions and modifications to existing code or add simple new thorns, stay clear of scheduling and AMR related details if possible, unless asked for by students * possibly have more formal lecture in the morning with more lectures interspersed with handson exercises in the afternoon, late morning. Detailed breakup into theory and hands-on still fluid and open for discussion. * include a visualization section of ~0.5 days * include data analysis of ET data in LIGO using the LIGO provided ipython notebooks even if only shown how to do this with sample data and including running the simulation https://losc.ligo.org/s/events/GW150914/GW150914_tutorial.html Detailed notes: * dates should be no earlier than July 24th due to restrictions and no later than 2nd week of August to avoid running into issues with students being in courses already * expect fewer students than in Trento (~45 students), mostly from Noth America, NCSA has room for about 50 participants we expect ~25 students * send questionnaire to students *before* school to gauge their level of expertise and what they hope to gain from attending the school. Use this to guide the level of detail of the course and exercises * pair up students so that knowledgeable and new users are paired up (this includes both science knowledge and also knowledge on eg command line tools and the ET) * ideas for topics: - see if track1 + track2 approach with more basic and more advanced exercises and topics is possible - consider intro into the ET and Cactus to (briefly) outline philosophy behind it - send or hand out questionnaire to students on last day to provide feedback on experience * provide some afternoon entertainment, eg tour of Blue Waters, organize dinner etc. * more hands-on approach on teaching likely works better with younger teachers that have more time to prepare, more formal lectures may work better with persons that have more experience teaching * aim to have extra TAs in classroom to help out students, aim for many TA (between 5-10 students per TA) Yours, Roland -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://pgp.mit.edu .

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meeting minutes for 2017-05-01
by Roland Haas 01 May '17

01 May '17

Present: Frank, Roberto, Steve, Roland, Eloisa, Gabrielle, Bhavesh, Erik, Manuela, Yosef, Zach, Qian, Eliu, Haris, Vassili, Pablo project presentation and reporting: * Gabrielle presented plans on more formal project reporting, https://hangouts.google.com/hangouts/redirect?dest=https%3A%2F%2Fdocs.googl… * would weed out ghost projects, developers and maintainers when projects no longer provide updates * allow to coordinate and organize projects "endorsed by the project" * "working groups" are longer lived entities, while "devlopment teams" are ephemeral that vanish once the project is done * action item: discuss offline and provide input, decide which working groups to participate in, will discuss again next week DataVault: * An Einstein Toolkit Data Repository https://drive.google.com/file/d/0B5-y-9jNuShAWVdUNmZHbm5pckk/view * Timeline summary: Year 1: prototype Develop components for generating metadata, basic archive services at NCSA. Year 2: development ...and add parameter files and a suite of initial data files to the DataVault. Year 3: user-ready Archive open for community data entry. Evaluation of tools. Year 4: tutorials to archive all of the data generated in the Einstein Toolkit DataVault * datasets will contain metadata describing it, some of it automatically generated some of it manually entered. Will contain doi URL for citation and reference purposes. * TBD: license of data, what metadate to include, where is the data stored will be sent out survey form to list next week * will also provide instructions on how to set up your own data storage eventually, however the primary goal is to explore the framework and find out what is required for a functional system * currently storage by third party repositories is not yet * currently datavault has funding for a small amount of storage, want to collect use cases and how to hook up datavault to institutional repositories. Currently sizes are limited to ~TB per year and GBs for individual files. * will discuss again next week after survey Project reports: NCSA: * see Qian's presentation RIT: * implement spherical coordinates BSSN code in ET codes in collaboration with Thomas Baumgarte and Zach Etienne. * working on infrastructure in Cactus to get boundary condition parallelized in ET (similar to rotatingsymmetry180 using slab thorn). Will be made available (incl. doc) once finished, currently being tested with a WaveMoL code which is working right now. * aim to have code available publicly in July * suggestion to make development code visible (at least to ET developers) so gather feedback eg on boundary condition * Zach and Thomas are working on generating code for the stencil in different coordinate systems. Will now merge the two sub-projects. * currently the arrays x,y,z contain r,theta,phi right now. Have to decide if we want to keep this or introduce a new "SphereGrid" thorn. Currently implementation was chosen due to ease of using existing code. * hydro equations are ready to be implemented, MHD equations are still being worked on * suggest spherical wave code as possible module in educational code repository that is part of SI2. More complex than Cartesian code so need to decide if extra complexity is acceptable. LSU: https://docs.google.com/document/d/1yX3rkcnsVbSovsh8_sZaqmZ8XEgGkQzggZ-EX09… * Steve Brandt has been working on a pre-sync branch of Carpet that automates synchronization and handles it in a lazy manner. This would eliminate one of the most tricky pieces in designing a Cactus schedule. A prototype exists on bitbucket https://bitbucket.org/cactuscode/cactus/branch/presync GT: * https://drive.google.com/file/d/0B3bzSynUjI9pQ3lnSURNbkpiNzQ/view * ID solutions mimicking astrophysical systems, currently single spherical system with different EOS * idea presented in: https://arxiv.org/pdf/1606.04881.pdf * infrastructure for binary neutron star simulations action items for future: * continue DataVault discussion after survey results (Qian) * provide presentation of math behind spherical coordinates code (Vassili) ET meeting in Europe: * maybe combine with meeting in Barcelona 16-20th http://astro-gr.org/astro-gr-barcelona-2017/ * mostly a retreat style for developers only ET meeting at NCSA: * want to have developer meeting in addition to retreat in Europe? * at least for the EU there is enough interest to justify two meeting * similar in North America * more details in separate mail to list Yours, Roland -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://pgp.mit.edu .

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