Account creation is limited to PRACE staff, but no account should be necessary to register for an event. If you are having trouble with registering to an event, please send an email to
23-26 September 2014
Stuttgart (Germany)
CET timezone

During August 2014 HLRS and Cray will install “HORNET” the follow-up to HERMIT. HORNET is a Cray XC30 with 3944 compute nodes. It is based on a new* processor and the Cray Aries network. The system will have some* cores, a peak performance of a few* PFLOP/s and a main memory of 493 TByte.

* for legal reasons, we currently do not announce technical details.

The first day is targeted to HERMIT users who will continue their work on HORNET. Specialists from Cray will talk about the hardware and software enhancements between the XE6 and XC30 in order to support your migration towards this new machine.

The second day is dedicated to user parallel IO at scale. Topics are I/O hardware aspects, parallel filesystems, several I/O strategies, serial I/O optimization, and I/O APIs such as MPI-IO, NetCDF, papallel-netCDF, HDF5, SIONLib, and ADIOS. Most of the discussed topics are independent of the specific hardware at HLRS.

The third and fourth day covers a 2 day introduction workshop about porting and optimizing your application for the Cray XC30. The topics of this workshop include the Cray Programming Environment, scientific libraries and profiling tools.  

HERMIT is available in Germany and Europe through this link.
Starts 23 Sep 2014 09:00
Ends 26 Sep 2014 16:30
Stuttgart (Germany)
Big seminar room
HLRS, University of Stuttgart, Allmandring 30, D-70569 Stuttgart, Germany

Series of three Courses:
Please book the appropriate days in the registration form!

2014, Tuesday Sept. 23
9:00 - 9:30: Local registration,
9:30 -17:30: New XC30/HORNET at HLRS

2014, Wednesday Sept. 24
9:00 - 17:30: Efficient Parallel I/O
                           (This day is mostly independent
                           of the hardware at HLRS)

2014, Thursday-Friday, Sept. 25-26
9:00 - 17:30 (Thu.), 9:00 - 16:30 (Fri.): Optimization on Cray XC30

Detailed Content See here.

Language English
Teachers Stefan Andersson, Aniello Esposito and Michael Neff (Cray)
Registration For academic participants within Europe or PRACE: see Registration button on the left. After your registration, you will receive an automated "congratulations"-email about your successful registration. This email implies that you have a guaranteed seat in the course and you should organize your travel.

For other participants, please apply for the HLRS course 2014-XC30.
Deadline for registration is Sep. 14, 2014 (extended deadline)
Fee Members of German universities and public research institutes: none
Members of universities and public research institutes within Europe or PRACE: none
All other participants (not from academia, or from outside Europe), please apply for the HLRS course 2014-XC30.
Prerequisites For days 2-4 programming experience in C or Fortran, some knowledge about parallel programming.
Links Additional information can be found, e.g., at
Cray XE6 (Hermit) at HLRS
See HLRS-travel-info. The next public transport stations are: "Universität, Stuttgart" (S-Bahn station, 15 min on foot) and "Lauchhau, Stuttgart" (Bus station, 4 min on foot to HLRS, bus lines 84, 92, 746, 747, 748, but not 82! from S-Bahn station "Universität, Stuttgart" and bus line 81 from S-Bahn station "Stuttgart-Vaihingen").
Accomodation: see also additional hotel list and HLRS-travel-info. Private Bed&Breakfast is also available (might be cheaper than the hotels), see, e.g., or A youth hostel is also available.
Further links: Online-Stadtplan des Stadtmessungsamtes Stuttgart or
Local Organizer Gabi Kallenberger phone 0711 685 65828,, Rolf Rabenseifner phone 0711 685 65530,
Cancelation policy If you cannot come to the course, please send an email to the organizer as soon as possible. This would allow us to accept additional participants from the waiting-list. There is no cancelation fee.
NO-SHOW: Registered persons that do not cancel and do not show up without any reasons are blocked for the next year on any of our workshops (because it is to expensive to produce unused copies of the slides for them).
Limit Maximum of 50 participants in Stuttgart (according to the seats in the rooms).
Handouts Each participant will get a paper copy of all slides.

If you have any questions, please consult the course forum page or click on the contact link on the left to send an email to the local organisers.