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About Bull, Atos technologies for the digital transformation: Bull is the Atos brand for its technology products and software, which are today distributed in over 50 countries worldwide. With a rich heritage of over 80 years of technological innovation, 2000 patents and a 700 strong R&D team supported by the Atos Scientific Community, it offers products and value-added software to assist clients in their digital transformation, specifically in the areas of Big Data and Cybersecurity. 

Bull is the European leader in HPC and its products include bullx, the energy-efficient supercomputer; bullion, one of the most powerful x86 servers in the world developed to meet the challenges of Big Data;  Evidian, the software security solutions for identity and access management; Trustway, the hardware security module  and Hoox, the ultra-secure smartphone. Bull is part of Atos.

About Atos: Atos SE (Societas Europaea) is a leader in digital services with revenue of €10 billion and 86,000 employees in 66 countries. Serving a global client base, the Group provides Consulting & Systems Integration services, Managed Services & BPO, Cloud operations, Big Data & Security solutions, as well as transactional services through Worldline, the European leader in the payments and transactional services industry. With its deep technology expertise and industry knowledge, the Group works with clients across different business sectors: Defence, Financial Services, Health, Manufacturing, Media & Utilities, Public Sector, Retail, Telecommunications and Transportation.

Role in the project

BULL will take part in WP1 and WP2. The people involved in this project are located in the CEPP (Center for Excellence in parallel Programming). This center is based in Grenoble and its activity consists in porting, profiling and optimizing applications for their efficient use of a parallel computers. Their everyday duty requires a high expertise in the computer architectures, the trends in their evolutions, and the impact on the software. Today, the constraints on the hardware are no longer transparent for the software. To get benefits from the coming architecture, the software has to be deeply studied and modified. The notion of co-design, without being strictly mandatory becomes highly necessary. Beside their high skills in parallel programming, most of the CEPP experts have a Ph.D. in a scientific domain: molecular dynamic, chemistry, oceanography, fluid dynamics, astrophysics, … Thanks to these two scientific pillars (HPC and science), the experts in the CEPP are able to understand the behavior of the application and also the goals and needs of the science. The experts who will be involved in this project will be selected thanks to these two background. It is clear that people having oceanography background would bring more benefits to the project, but, some others experts may have a specific knowledge that would be necessary (co-processors, IO, network, …). Thus, this will not be one expert who will implement the work, but probably several different according to the needs. However, an overall envelope can be agreed and the dedicated expert will be the best possible one. Atos is focused on business technology that powers progress and helps organizations to create their firm of the future. The Group is the Worldwide Information Technology Partner for the Olympic & Paralympic Games and is listed on the Euronext Paris market. Atos operates under the brands Atos, Bull, Canopy, Worldline, Atos Consulting and Atos Worldgrid.

Names of the colleagues involved

Dr Xavier Vigourou, Dr Cyril Mazauric Franck Vigilan, Enguerrand Petit

Relevant infrastructure and services available for climate & weather

Different supercomputers are part of the CEPP; they are selected according to the different needs: reproducibility, ability to be modified. In the CHANCE context, the experiments will be done on targeted hardware provided by the project. CEPP is used to integrate, modify and give access to the hardware, they can host it a reliable infrastructure (login nodes, storage, …).

For instance, we have pure CPU nodes, nodes with latest GPU and accelerators. Besides, in terms of interconnect, storage, software stack; we are able to build configurations with a lot of flexibility. This will bring to the project the ability to rely on an flexible infrastructure administrated by professional sysadmin.

The size of the machines evolves continuously, but, there are generally, around one hundred of

CEPP nodes up and running.


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