FAQ – Frequently asked Questions

  • Director of the institute: Most departments are organized into institutes (Fachgebiete). If this does not apply to your organization, please insert the dean, or a person with staff responsibility for the main research group.
  • PI: The principal investigator is responsible for the scientific aspects of the project. This can be the director as well as a junior professor, or post doc.
  • Main researcher/ Project manager: In general, this is the person who does the main part of work in this project. The PM is responsible for the administrative aspects of the scientific project. He or she is also the “technical contact” the HRZ communicates with.
  • Additional researchers: All other researchers who can compute on this project account. This includes other PhD students as well as students, who are working for the project.

We distinguish between the project classes “SMALL”, “MIDDLE”, and “LARGE”.

SMALL includes projects which use up to 204,000 core-hours.
For a 12-month project, this translates to 17,000 core-hours per month, which is roughly equivalent to the continuous use of 24 cores = one compute node.

MIDDLE includes projects between 204,000 and 6,720,000 core-hours, translating to 17,000 to 560,000 core-hours per month in a 12-month project, equivalent to steady use of one island = 32 compute nodes.

LARGE projects are from 6,720,000 core-hours up to 24,500,000 core-hours, translating to 560,000 to 2,040,000 core-hours per month in a 12-month project, equivalent to steady use of ~10% of the total capacity of the Lichtenberg cluster.

The category “EDUCATION” is reserved for courses and trainings, while computing time grants for bachelor and master theses are handled via the above mentioned project classes.

More information about “EDUCATION” can be found at “Lehre and Workshops”.

In general, one main researcher (PhD or post-doc) uses a project account. The main researcher or PM can decide to add others to his or her project, for instance bachelor or master students, or a colleague he or she is collaborating with on this project.

All these coworkers need to have their own user account on the HLR before being added to a project.

Beware: while sharing your project account is explicitly allowed, sharing your user account is strictly prohibited!

In general, a Lichtenberg project should be in the range and size of a PhD project. For longer research and scientific endeavours, recurrent follow-up projects are needed.

In the initial proposal however, try to outline the whole scientific goal, not just your 1st year's targets.

The project manager is responsible for applying and (after completion) for reporting on the project.
He will be working with the HRZ for the (technical) reviews, and hand in the original of the signed proposal to the HRZ.

The proposal has to be signed by the PM and by the “principal investigator” who needs to be professor or post-doc.

For a “SMALL” project, only the web form needs to be completed, printed out, signed and sent to the HRZ.
This form mainly asks for technical details and a small abstract (150-300 words) of the scientific goals.

For “MIDDLE” and “LARGE” projects, also a detailed scientific project description (DPD) has to be provided by the applicant.

“SMALL” and “MIDDLE” projects can be submitted at any time and the proposals will be handled upon entry.
In case of ambiguous reviews, the proposal is postponed until the decision of the steering committee (Forschungsrechnerbeirat TU Darmstadt).

“LARGE” project proposals are due on the fourth of February, May, August, or November.

All projects are subject to a technical review by the HRZ. “MIDDLE” and “LARGE” project proposals are objected to an extended technical review, i.e. regarding the scalability of the code.

As to scientific metrics: “MIDDLE” projects will be reviewed by two TU Darmstadt experts. For “LARGE” projects, one of the two experts needs to be an external reviewer (from outside TU Darmstadt).

Based on these reviews, the steering committee allocates the resources.

The maximum grant period for any given project is one year, regardless of the S, M or L classes.

If you know that your project needs less than a year, we suggest to write your proposal accordingly. As the computational resources are allotted evenly over the granted time period, shorter projects get a greater resource share per month, resulting in a higher priority per job.

In well-reasoned cases, a project can be extended for one or two months beyond one year.

If your research project will take much longer than a year to complete, you will need to apply for follow-up projects every year.

Nonetheless, in the initial proposal's abstract and description (free wording), we suggest to sketch the whole scientific endeavour and the total time it is likely to need.

Like you do it with your coworkers, referencing substantial contributions to your research publications should include the computational time grants from the Lichtenberg cluster. Properly communicating them improves public understanding of how research funds for HPC are spent and how we are working to support your research.

We thus kindly ask for an acknowledgment in all your publications arose out of or having used calculations on the Lichtenberg:

Calculations for this research were conducted on the Lichtenberg high performance computer of the TU Darmstadt.

If having been supported by the HKHLR, you could add:

For this research, extensive calculations have been conducted on the Lichtenberg high performance computer of the Technische Universität Darmstadt. The authors would like to thank the Hessian Competence Center for High Performance Computing--funded by the Hessen State Ministry of Higher Education, Research and The Arts--for helpful advice.

For all TU Biblio publications, the category „Hochleistungsrechner“ within the „Divisions” list (as a subcategory of „Hochschulrechenzentrum“) was added to TU Biblio.

Please use this category for your research publications related to the Lichtenberg Cluster, then your publication will be listed here accordingly.