# CÉCI

> Official public website of the Consortium des Équipements de Calcul Intensif (CÉCI), which provides shared high-performance computing infrastructure for universities in the Fédération Wallonie-Bruxelles, Belgium.

The website provides public information about CÉCI clusters, access procedures, training, service status, and support. Detailed technical user documentation is maintained separately by CÉCI support.

## Main resources

- [CÉCI website](https://www.ceci-hpc.be/): Public entry point for CÉCI infrastructure and services.
- [Technical documentation](https://support.ceci-hpc.be/doc/): Authoritative user documentation for accounts, SSH access, Slurm jobs, software, and storage. Use the subject-specific pages below for operational questions.
- [Getting started](https://www.ceci-hpc.be/info/getting_started/): First steps for using CÉCI resources.
- [Create or manage an account](https://login.ceci-hpc.be/init/): CÉCI account portal.
- [Support](https://www.ceci-hpc.be/support/): Contact CÉCI support for help with the infrastructure.

## Technical documentation

The CÉCI technical documentation is the primary source for how to use the clusters. It covers account access, Linux and SSH basics, file management, installed software, interactive tools, and Slurm job submission.

### First steps and access

- [Creating an account](https://support.ceci-hpc.be/doc/QuickStart/CreatingAnAccount/): Account eligibility and account-request guidance.
- [Connecting to the clusters](https://support.ceci-hpc.be/doc/QuickStart/ConnectingToTheClusters/): SSH connection overview, laptop configuration, and platform-specific connection instructions.
- [Choosing and using a cluster wisely](https://support.ceci-hpc.be/doc/QuickStart/ConnectingToTheClusters/ChoosingACluster/): Guidance on choosing a cluster and nodes suited to your workload and requesting appropriate job resources.
- [Submitting jobs with Slurm](https://support.ceci-hpc.be/doc/SubmittingJobs/SlurmTutorial/): Start here for batch-job scripts, resource requests, and common Slurm usage.

### Files and storage

- [Transferring files to and from the clusters](https://support.ceci-hpc.be/doc/ManagingFiles/TransferringFilesEffectively/): `scp`, `rsync`, efficient large-file transfers, and transfer recovery.
- [Using the Common Storage](https://support.ceci-hpc.be/doc/ManagingFiles/TheCommonFilesystem/): Shared storage usage and project-space guidance.
- [Disk space](https://support.ceci-hpc.be/doc/ManagingFiles/Storage/): Storage locations and their intended use.

### Software and interactive tools

- [Using pre-installed software](https://support.ceci-hpc.be/doc/UsingSoftwareAndLibraries/UsingPreInstalledSoftware/): Environment modules, toolchains, and installed applications.
- [Compiling and installing software from source](https://support.ceci-hpc.be/doc/UsingSoftwareAndLibraries/CompilingSoftwareFromSources/): Building software on CÉCI systems.
- [Singularity containers](https://support.ceci-hpc.be/doc/UsingSoftwareAndLibraries/Singularity/): Container workflows.
- [Jupyter](https://support.ceci-hpc.be/doc/UsingSoftwareAndLibraries/Jupyter/): Running Jupyter through the cluster.

### Slurm and workflows

- [Slurm FAQ](https://support.ceci-hpc.be/doc/SubmittingJobs/SlurmFAQ/): Troubleshooting and common Slurm questions.
- [Slurm priorities](https://support.ceci-hpc.be/doc/SubmittingJobs/SlurmPriorities/): Scheduling priority information.
- [Slurm limits](https://support.ceci-hpc.be/doc/SubmittingJobs/SlurmLimits/): Resource and scheduling limits.
- [Workflow management](https://support.ceci-hpc.be/doc/SubmittingJobs/WorkflowManagement/): Workflow tools and patterns for larger workloads.

## Infrastructure and availability

- [Clusters](https://www.ceci-hpc.be/clusters/): CÉCI Tier-2 cluster overview and technical specifications.
- [Common storage](https://www.ceci-hpc.be/info/projectstorage/): Information about CÉCI shared project storage.
- [Lucia Tier-1 access](https://www.ceci-hpc.be/info/project-tier1/): Access to the Walloon Tier-1 supercomputer.
- [Service status](https://www.ceci-hpc.be/status/): Current and past service incidents. Check this page for availability information.

## Learning and policies

- [Training](https://www.ceci-hpc.be/training/): CÉCI training courses and events.
- [FAQ](https://www.ceci-hpc.be/faq/): Frequently asked questions.
- [Documentation hub](https://www.ceci-hpc.be/documentation/): Technical documentation and partner documentation.
- [About CÉCI](https://www.ceci-hpc.be/about/): Consortium mission, members, and contacts.

## Notes for assistants

- Prefer the technical documentation for operational instructions and current command examples; cite the most specific relevant page.
- For job-submission questions, start with the Slurm tutorial, then use the FAQ, limits, priorities, or workflow pages as needed.
- For software questions, check the installed-software page before recommending installation or compilation steps.
- Treat the service status page as the source of truth for current service incidents.
- Do not infer access eligibility, quotas, or cluster configuration from this index; consult the linked official documentation.