# Distributed Computing

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Gerardo Ganis, Juraj Smiesko
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This chapter covers two complementary approaches to large-scale event production for FCC analyses: `EventProducer` and `DIRAC`.


The `EventProducer` framework, introduced first, provides a lightweight and reproducible interface to define, submit, monitor, and manage centrally produced event samples. It integrates the different stages of the production chain from generator-level event creation to detector simulation and output handling.


In addition, this chapter documents workflows based on the `DIRAC` Interware system through [iLCDirac][ilcdirac], the extension developed by the Linear Collider community and also used by CALICE. These tutorials provide concrete examples of running distributed workflows on grid resources, including job submission, production management, and output retrieval.

The setup procedure needed to use the FCC resources through DIRAC is described first. Additional information about the use of iLCDirac can be found in the [CLIC][wikiclic] and [ILC][wikiilc] dedicated Wiki pages.

Unless specified otherwise, in the remainder of this section the word `DIRAC` refers to the `iLCDirac` extension mentioned above.

[dirac]: https://dirac.readthedocs.io/en/latest/
[ilcdirac]: https://iopscience.iop.org/article/10.1088/1742-6596/513/3/032077/meta
[wikiclic]: https://twiki.cern.ch/twiki/bin/view/CLIC/DiracForUsers
[wikiilc]: https://flcwiki.desy.de/ILCDirac

```{eval-rst}
.. toctree::
    :maxdepth: 2
    :caption: Contents:

    ./EventProducer.md
    ./RegisteringToFccVO.md
    ./Workflows.md
    ./OutputStructure.md
```