So

this HPC Cafe is about how to get computing resources in Germany and Europe from the point

of view of you

scientists

who need resources that exceed what is at your disposal on your

desk, for example, on your laptop.

So we are three presenters today

myself

Helmut Brüchle from ELRZ

he will present

remotely and Harald Köstler

he will tell us something about the highest level of HPC

that you can get in Europe.

This is Euro HPC.

Okay, so let's start.

First of all, I'd like to show you the HPC supply pyramid.

We've been using this image since the dawn of time, so to speak.

We imagine the resources that exist for HPC in Europe to be organized like in a pyramid.

At the base of the pyramid, we have the so-called tier three systems, the local clusters, so

that starts basically at your desktop.

Anything you have at your disposal right away or with a very low entry barrier

for example

your department cluster, your group cluster, your local computing center.

So usually these resources are accessible without further ado.

Maybe you have to provide some kind of proposal, maybe not, but it's usually low barrier.

The next level is what we call tier two.

This is where the NHR supply area starts.

NHR stands for National High Performance Computing.

It's an initiative founded a few years ago since 2021

which provides a kind of medium

level of supply for HPC all over Germany.

So I'll come to that in a second.

Third level is tier one.

So these are the German national centers.

Basically these are organized in the Gauss Center for Supercomputing, GCS, and the top

tier is tier zero, the European centers, which are available all over Europe.

So this European level is called Euro HPC or Euro HPC Joint Undertaking.

It's a legal and funding entity in Europe and its funding is 7 billion euros from 2021

to 27.

So that's a significant amount of money, but there are also some, it's just more than one

country involved.

So that money gets distributed.

The Gauss Center for Supercomputing is the union of the three centers at Jülich, Garching

and Stuttgart.

So the ones that are actual federal German computing centers, and they have their own

process for application and compute time granting.

And I'll come to that.

Actually Helmut will come to that when it's his turn.

And then finally NHR.

It's a coordinate network of national high performance computing centers funded by the