Computing Basics for DUNE - Revised 2025 edition: Glossary

This tutorial is brought to you by the DUNE Computing Consortium.

The goals are to give you the computing basis to work on DUNE.

There is documentation somewhere!

Home directories are centrally managed by Computing Division and meant to store setup scripts, do NOT store certificates here.

Network attached storage (NAS) /exp/dune/app is primarily for code development.

The NAS /exp/dune/data is for store ntuples and small datasets.

dCache volumes (tape, resilient, scratch, persistent) offer large storage with various retention lifetime.

The tool suites idfh and XRootD allow for accessing data with appropriate transfer method and in a scalable way.

CVMFS distributes software and related files without installing them on the target computer (using a VM, Virtual Machine).

SAM and Rucio are data handling systems used by the DUNE collaboration to retrieve data.

Staging is a necessary step to make sure files are on disk in dCache (as opposed to only on tape).

Xrootd allows user to stream data files.

The Unix Product Setup (UPS) is a tool to ensure consistency between different software versions and reproducibility.

CVMFS distributes software and related files without installing them on the target computer (using a VM, Virtual Machine).

Spack is a tool to deliver well defined software configurations

CVMFS distributes software and related files without installing them on the target computer (using a VM, Virtual Machine).

There is more documentation!

People are hear to help

CPU, memory, and build time optimizations are possible when good code practices are followed.

The DUNE Computing Consortium has presented this workshop so as to broaden the use of software tools used for analysis.