the backend infrastructure is in the kernel and thus independent of the user interface you are using. In SLI you can query the list of available recording backends using

I just realized that I posted the link to my personal build of the documentation, which has not been updated in a while. The official and current version is actually here:

Jochen,
Is it usable from the SLI interface? I've been running NEST on Fugaku using SLI.

On Mon, Oct 12, 2020 at 8:27 PM Jochen Martin Eppler
<j.eppler@fz-juelich.de> wrote:

Dear Itaru,

we have created the new I/O infrastructure (and the SIONlib backend in particular) to address exactly the problem you describe. It is available in NEST master since quite some time and the user-level documentation can be found here:

https://nest-simulator-jougs.readthedocs.io/en/latest/from_cpp/recording_backend_sionlib.html#sionlib-backend

In order to enable it, you first install SIONlib (see this script for an example on how to do that) and then pass the path to NEST’s CMake using the --Dwith-sionlib=<path>.

Once everything is installed, you can just set the record_to property of any recording device to sionlib to let it write to SIONlib binary files. A minimal reader for the files can be found here: https://github.com/nest/nest-sionlib-reader

Please let me know of any problems you run into. As this is quite new and has not been tested extensively in the wild, there might still be some glitches.

Cheers,
Jochen!

On 09.10.20 08:55, Itaru Kitayama wrote:

Hi,
Has anyone explored the external library support? I am on Fugaku and
the jobs can create casually tens of thousands of files in a single directory;
this aborts jobs.

Itaru.
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Dr. Jochen Martin Eppler
Phone: +49(2461)61-96653
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Simulation Laboratory Neuroscience
Jülich Supercomputing Centre
Institute for Advanced Simulation

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