LHC@home

Does anyone have an up-to-date guide at all? I tried following this one https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4840 but kept getting errors, when I try and run the tasks they fail with a computational error.
I have CMVFS setup and the Theory tasks are running fine.

Thanks

Perhaps it's just a minor issue.
A logfile might be helpful but so far even errors are not yet reported.

Meanwhile you may post the output of:

cvmfs_config probe
cvmfs_config stat

And you may check whether Singularity (-> now called Apptainer) is installed.

I don't think I have Singularity / Apptainer installed, is there a guide to doing so?

Your Linux distribution may provide an installation package.
If so, it should be enough to
- install it
- add the user running BOINC to the apptainer group
- log out and login that user (or reboot)


More information can be found here:
https://github.com/apptainer/apptainer

Found the guide here : https://apptainer.org/docs/admin/main/installation.html

WU is running a lot longer than it did before so I think I am good now, oddly the CPU and memory usage is minimum, is that normal?

Check the stderr.txt in the "slots" directory your task is running in.

It should end with something like:

[2022-07-22 10:08:58] Set ATHENA_PROC_NUMBER=2
[2022-07-22 10:08:58] Starting ATLAS job with PandaID=5533113941
[2022-07-22 10:08:58] Running command: /usr/bin/singularity exec --pwd /home/boinc3/BOINC_ATLAS/slots/0 -B /cvmfs,/home /cvmfs/atlas.cern.ch/repo/containers/fs/singularity/x86_64-centos7 sh start_atlas.sh

After a few minutes (be patient) there should also be a subdirectory like "PanDA_Pilot-5533113941" and lots of other files.

Second one is maxing the CPU now, odd that the first one didnt

This is over the day possible with some Tasks.
When a Atlas-Task is running over half a day, and no single Core using, something went wrong.
You can delete this Task. Have also up to five Tasks a day.

The steps required to run native ATLAS depend heavily on the OS you are using, so it's hard to provide a single guide that works for everyone. But there are instructions available for specific platforms, eg Ubuntu 20.04.

The options for running ATLAS Linux are listed in this post: https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5630&postid=44620#44620

I see now that all your tasks are successfully completing so feel free to share what you had to do to make it work :)

Does anyone have an up-to-date guide at all? I tried following this one https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4840 but kept getting errors, when I try and run the tasks they fail with a computational error.
I have CMVFS setup and the Theory tasks are running fine.
Thanks

After some trial 'n error this is what works for me for native ATLAS & Theory apps running Linux Mint 20.3:

sudo apt install runc
sudo apt install docker.io -y
sudo docker pull cvmfs/service
wget https://ecsft.cern.ch/dist/cvmfs/cvmfs-release/cvmfs-release-latest_all.deb
sudo dpkg -i cvmfs-release-latest_all.deb
rm -f cvmfs-release-latest_all.deb
sudo apt-get update
sudo apt-get install cvmfs -y
sudo wget https://lhcathome.cern.ch/lhcathome/download/default.local -O /etc/cvmfs/default.local
Open /etc/cvmfs/ as root:
In /etc/cvmfs/default.local add "single":
------------------------------------------------------ start of default.conf ------------------------------------------------
CVMFS_CLIENT_PROFILE=single
------------------------------------------------------ end of default.conf ------------------------------------------------
Edit /etc/cvmfs/default.local to this:
------------------------------------------------------ start of default.local ------------------------------------------------
# Must be set: the repositories required for ATLAS/Theory
# If "CVMFS_DEFAULT_DOMAIN" is set to "cern.ch" like in /etc/cvmfs/default.d/50-cern.conf simple names 
will expand to FQRNs, e.g. atlas -> atlas.cern.ch
CVMFS_REPOSITORIES="atlas,atlas-condb,grid,cernvm-prod,sft,alice"

# Must be set to ensure openhtc.io is used:
CVMFS_USE_CDN=yes

CVMFS_HTTP_PROXY="auto;DIRECT"

# Additional options
CVMFS_KCACHE_TIMEOUT=2
CVMFS_MAX_RETRIES=3
------------------------------------------------------ end of default.local ------------------------------------------------
sudo cvmfs_config setup
sudo cvmfs_config reload  (May not be needed but it doesn't hurt.)
cvmfs_config probe
If the probe fails, try to restart autofs with:
sudo systemctl restart autofs

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Found the guide here : https://apptainer.org/docs/admin/main/installation.html

WU is running a lot longer than it did before so I think I am good now, oddly the CPU and memory usage is minimum, is that normal?

Looks like there are two versions, apptainer and apptainer-suid. Curious which one did you install?

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