Users

users@lists.einsteintoolkit.org

3 participants
3984 discussions

SPH in einstein toolkit
by Philip Chang 26 Sep '17

26 Sep '17

Dear developers, I saw that there was a discussion back in 2015 in regard to SPH in the Einstein toolkit. Have any progress been made in this regard? I am especially interested in how the sph particles move (and what it means to move) in a 3+1 split. Cheers, Phil Chang

2 1

meeting minutes for 2017-09-25
by Roland Haas 25 Sep '17

25 Sep '17

Present: Steve, Roland, Peter, Sam, Bill, Vassili, Erik, Gabrielle, Yosef Cactusmaint email list: * mentioned all over the ET place, but no longer exists * Steve will get cactusmaint working again * Steve and Gabrielle will at leisurely pace go through page and find places where users(a)cactuscode.org would be better * task force: Steve, Erik, Gabrielle, Roland to define Cactus projects vs ET projects Historical pictures for Cactus: * call for photos still ongoing send to Gabrielle https://www.dropbox.com/s/mpmcwmw6ewdklkf/EdFest.mp4?dl=0 ET demo machine at NCSA: * as of this morning is responding to web-access: http://www.einsteintoolkit.nationaldataservice.org/ Working group updates * Gabrielle added material to the wiki * first one ready here https://docs.einsteintoolkit.org/et-docs/Data_Dependant_Task_Scheduler * working group definitions here https://docs.einsteintoolkit.org/et-docs/ET_Working_Group_Policies_and_Proc… * have meetings for this at beginning of month presync scheduler: * Sam has presync code working with ML_BSSN Next release * regular schedule would call for November release * multiple dislikes for this * next date would be February * what to include in release? ** two new thorns: GiRAFFE, RNDID ** SI2 deliverables * need release manager for schedule, wiki page etc ET call * Roland will host call on Oct 2nd * likely no call on Oct 9th 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 .

1 0

meeting minutes for 2017-09-18
by Roland Haas 19 Sep '17

19 Sep '17

Present: Bill, Chris, Etik, Gabrielle, Sam, Steve, Yosef, Roland, Qian, Ian, Vassili, Peter, Tutorial machine at NCSA: * have final confirmation, about to deploy instance, should happen this week * contact current outstanding requests about current status * Roland suggests to take down tutorial page using QueenBee and instead point to Simplified tutorial instead for the time being Working groups * need to pick this up, last action was sending around working group document * Ian suggests working group for lower level infrastructure in the ET * add to next week's agenda ET workshop in Mallorca: * creating video of early days of Cactus, request old photos Supercomputing: * Steve is going, will have poster about Cactus * not ET related demo planned, no planned use of Cactus * NCSA has demo (Wolfram and NVIDIA) about deep learning with Daniel George and Eliu Huerta KNL status update * Peter has his cosmology code running on KNL, gets fairly decent performance * this code is quite different from eg McLachlan 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 .

2 1

cactusmaint@cactuscode.org
by Steven R. Brandt 18 Sep '17

18 Sep '17

The cactusmaint(a)cactuscode.org email address seems to not work. Do we want to fix it, or just steer users to this list? --Steve

2 1

Splitting CarpetHDF5 data into smaller domains
by Ashok Choudhary 18 Sep '17

18 Sep '17

Hi, I have a big CarpetHDF5 3D data file which I want to visualize with ViSit. I am only interested in a small subset of complete data. Is there any HDF5 utility within einsteintoolkit which I can use to extract data in a smaller sub domain ? Thank you, Ashok

2 1

meeting minutes for 2017-09-11
by Roland Haas 11 Sep '17

11 Sep '17

Present: Steve, Anna, Yosef, Roland, Qian, Peter, Bhavesh, Gabrielle, Ian, Samuel Cactus release * People assume it is dead by now. * make a Cactus release now, while we have less pressure * check Cactus website for up-to-date information ** remove outdated information ** how can one actually edit the page (CCT accounts)? TODO: Steve to find out * check for Cactus' release notes by Frank * draft release procedures Demo of the RunView * Anna gave presentation, code is on https://github.com/stevenrbrandt/RunView will be updated after this call * Runview is a thorn for the ET * analyse program efficiency for domain experts, presents easy to understand overview of efficiency as interactive (javascript) html pages * 1st graph shows bubble like timeline where bubble size correlates with L3 cache misses (bigger bubbles are worse) * 2nd show timline of schedule items, identifies recurring schedule patterns to show how a single iteration of the pattern looks like * uses information from Cactus timers and from PAPI * currently development stage, not yet production ready * uses regular Cactus, just needs the Runview thorn Q&A: * currently not yet possible to study load imbalance as data Creation of a popular book about the science done by the Einstein Toolkit (Steven) * for outreach and interest in Cactus * geared towards scientists but not already Cactus users * aim is raise visibility of this group * alternatives: ** long review article ** special issue of a journal * to raise the footprint it may also be sufficient to hire an undegraduate student for this Facebook page: * page is up, no information yet though switch ExternalLibraries over to github * proceed for now since no working alternatives are available right now * if this does not work, revert ET workshop: * if not yet done you really must book them now 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 .

1 0

Agenda for Monday's Meeting
by Steven R. Brandt 08 Sep '17

08 Sep '17

Please update the Wiki with agenda items for Monday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --Steve

1 0

Re: [Users] Parameter file for rotating neutron star with IllinoisGRMHD
by Maitraya Bhattacharyya 07 Sep '17

07 Sep '17

Dear Zach, I was not aware that rotating neutron star initial data was not included in the Einstein Toolkit. Can you tell me more about RotNS ? It may be that I have to write the initial data myself although I am not proficient enough with ET to do so at the moment. Can you help ? Maitraya. On Thu, Sep 7, 2017 at 6:16 PM, Zach Etienne <zachetie(a)gmail.com> wrote: > Hi Maitraya, > > Which initial data thorn were you planning to use? There is a rotating > neutron star initial data thorn (RotNS, I believe) that was *proposed* > for inclusion into the Toolkit, but none officially in the Toolkit as far > as I am aware. Can LORENE generate such data? > > -Zach > > * * * > Zachariah Etienne > Assistant Professor of Mathematics > West Virginia University > http://math.wvu.edu/~zetienne/ > > On Thu, Sep 7, 2017 at 12:55 AM, Maitraya Bhattacharyya < > maitraya.linux(a)gmail.com> wrote: > >> Hi, >> >> Does anyone have access to a parameter file for generating a single >> rotating neutron star with IllinoisGRMHD ? >> >> Please help! >> >> Maitraya. >> >> _______________________________________________ >> Users mailing list >> Users(a)einsteintoolkit.org >> http://lists.einsteintoolkit.org/mailman/listinfo/users >> >> >

3 2

Parameter file for rotating neutron star with IllinoisGRMHD
by Maitraya Bhattacharyya 06 Sep '17

06 Sep '17

Hi, Does anyone have access to a parameter file for generating a single rotating neutron star with IllinoisGRMHD ? Please help! Maitraya.

1 0

Help with simulations having fluid
by Maitraya Bhattacharyya 04 Sep '17

04 Sep '17

Hi, I was suggested by Ian to write to Roland or Frank, but posting this here will be of help to others as well. I am starting out on simulating neutron stars and possibly black holes with accreting fluid. After initial discussions with Prof. Rezzolla (whose book I am presently studying), I have decided to use IllinoisGRMHD for these simulations. While this year's school has a good introduction to hydrodynamics and magnetohydrodynamics, I am having difficulty finding documentation to effectively write my parameter files and also to solve for new initial data. My knowledge with the Einstein Toolkit is that I've run the example simulations provided. I need help, to master the initial learning curve and would be ready to devote time if you are an expert at this and can teach me how to do this. You can also provide me with reading material if such is available. I will settle on a problem soon and my questions will be more focused in later emails. Thanks, Maitraya.

1 0

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

Users