FLUKA and FLAIR¶
Hostgroups
These features are available for the following hostgroups and their respective subhostgroups:
-
fluka
:machine_protection/linux
-
flair
:machine_protection/linux/ts
fluka
can run on any of the Linux machines. The headless Linux nodes of the machine_protection/linux/nodes
hostgroup (see here for the definition of hostgroup) are suitable for running simulations jobs. Of course the Terminal Server machines are also available to run fluka
, for example if one runs it from flair
.
flair
is also available on the Linux TS VMs. The flair
GUI is best used from a Desktop Environment such as XFCE, although direct X forwarding would also work. For that reason, flair
is only installed on the TS and not on the headless nodes. flair
is provided as a Conda package.
See the documentation page to identify the available general purpose Linux VMs of the node
or ts
subhostgroups.
Accessing FLUKA
Users must first request a fluka
license from the official FLUKA website. A valid license is required before being added to the
machine-protection-studies-fluka-users
e-group which controls the access to the mp-fluka
EOS project space containing the fluka
binaries). The conda
package for flair
is also distributed on that EOS project space (see below).
Running fluka
¶
FLUKA website and user forum
Please refer to the official FLUKA website and user forum for additional information.
fluka
and all the associated binaries are present in the $PATH
, so it can simply be run as follow:
fluka file.inp
The main fluka
binary and the associated binaries are located on the mp-fluka
EOS project space (/eos/project-m/mp-fluka/
) at /eos/project-m/mp-fluka/fluka/bin
; a shell script and symbolic links located in /usr/local/bin
ensure that they are all available in your $PATH
.
Running flair
¶
FLAIR website and user forum
Please refer to the official FLAIR website and user forum for additional information.
tl;dr - Initial setup of the flair
conda environment
To install and activate the flair
Conda environment and run flair
, proceed as follow:
conda env create --file /eos/project-m/mp-fluka/flair.yml
conda activate flair
conda install /eos/project-m/mp-fluka/flair.tar.bz2
flair
tl;dr - Subsequent environment activation and running flair
When the flair
conda environment is correctly installed (check that with conda env list
, simply activate it and
run flair
:
conda activate flair
flair
flair
is provided as a Conda package (condensed instructions above). This allows to install flair
within a given environment without affecting the system Python or any other Python environment that might be in use.
The following environment is proposed as a template, although the user is of course allowed to create a different one:
# Run:
# conda env create --file /eos/project-m/mp-fluka/flair.yml
# Customized environment for Flair with Python 3
name: flair
channels:
# Conda forge distribution
# https://conda-forge.org
- conda-forge
dependencies:
- python=3.7
- matplotlib
- numpy
- pydicom
- Pillow
The file is avalable at /eos/project-m/mp-fluka/flair.yml
. An environment can be created and activated like this:
conda env create --file /eos/project-m/mp-fluka/flair.yml
conda activate flair
The flair
package then needs to be installed like this:
conda install /eos/project-m/mp-fluka/flair.tar.bz2
flair
should then be available:
flair
flair
needs to be configured to correctly locate the fluka
executables. The screenshot below details the changes to be made.
When the environment has already been created (verify this with conda env list
) and flair
was installed in the
environemnt, you can subsequently run flair
by simply activating the environment first:
conda activate flair
flair
Administration guide¶
The following is intended for administrators only.
EOS project space and ACL e-groups
To provide a fine-grained access control to the FLUKA binaries, a dedicated EOS project space has been created: mp-fluka
.
The following e-groups have access to it:
- cernbox-project-mp-fluka-admins (admins): the mpcfluka
service account and the machine-protection-studies
e-group;
- cernbox-project-mp-fluka-writers (writers): the admins e-group;
- cernbox-project-mp-fluka-readers (readers): the machine-protection-studies-fluka-users
e-group.
The machine-protection-studies-fluka-users
e-group should thus be used to control the users allowed to access (read-only) the mp-fluka
EOS space.
Only these users will be able to run fluka
and associated binaries. Before adding a user to that e-group, one should verify that the user has
a valid license!
Creating or updating the fluka
distribution
This requires a write access to mp-fluka
on EOS (see above).
To update the fluka
distribution:
- Download the latest binary FLUKA release from the official website ("Binary libraries for GNU/Linux", chose the appropriate Fortran compiler -
gfortran
9 is adivsed) -
From a machine able to access the EOS project space (
/eos/projet-m/mp-fluka
):- Load a toolchain providing the same
gfortran
version as the one choosen above:
source /cvmfs/sft.cern.ch/lcg/views/setupViews.sh LCG_100 x86_64-centos7-gcc9-opt
- Extract the archive and compile:
tar -xvf fluka-[release].[platform]-gfor[compiler-version].tgz cd src make
- Load a toolchain providing the same
-
Copy it back to EOS
Creating or updating the flair
Conda package
This requires a write access to mp-fluka
on EOS (see above).
A dedicated repository has been created for the conda
package, along with documentation files. Please refer to the documentation in the repository.