June 2013 - aktuell - lists.lrz.de

Stellenangebot: Systemadministration (wiss.Mitarb.)
by LRZ aktuell June 28, 2013

June 28, 2013

Fuer die anwendungsorientierte Systembetreuung der Server- und Speicherkonfiguration, die das Leibniz-Rechenzentrum fuer die Bayerische Staatsbibliothek betreibt, suchen wir eine(n) wissenschaftliche(n) Mitarbeiter(in) mit Hochschulabschluss in einem techniknahen Fachgebiet. Sie unterstuetzen die Dienste-Administratoren des LRZ bei den anwendungsnahen Systemarbeiten an Servern und Speichersystemen und sorgen fuer die Koordination und Kommunikation mit dem Kunden. Wir erwarten von Ihnen * Programmierkenntnisse * Kenntnisse in der Linux-Systemadministration * Team- und Kommunikationsfaehigkeit ebenso wie * Faehigkeit zum selbstaendigen Arbeiten. Die naeheren Einzelheiten entnehmen Sie bitte unserer Stellenausschreibung unter http://www.lrz.de/wir/stellen/ 2013-06_sysadmin-bsb/. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/aktuell/ali4615/ Hannelore Apel

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Loadleveler Energy Tags
by LRZ aktuell June 27, 2013

June 27, 2013

Dear users of the SuperMUC Petaflop system, the default frequency of SuperMUC has now been set to 2.3 GHz, to follow LRZ's energy saving policy. Therefore, energy tags which were generated before the last maintenance are no longer compatible and have been erased. We kindly ask all our users to regenerate their energy tags, as described the corresponding section of LRZ's Loadleveler documentation. There you will find more detailed information about working with Loadleveler energy tags as well. http://www.lrz.de/services/compute/supermuc/loadleveler/#energy . This information is also available on our web server http://www.lrz-muenchen.de/services/compute/supermuc/aktuell/ali4614/ Nicolay Hammer

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Upd:Emergency Maintenance for MPP Cluster on June 28
by LRZ aktuell June 27, 2013

June 27, 2013

Aenderungen an der Mitteilung: Update An emergency maintainance of the Linux MPP Cluster is scheduled for Friday, 28th June 2013, hence the machine is drained. We apologize for any inconveniences this may cause. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/compute/aktuell/ali4613/ Matthias Brehm

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Emergency Maintenance for MPP Cluster on June 27
by LRZ aktuell June 27, 2013

June 27, 2013

An emergency maintainance of the Linux MPP Cluster is scheduled for Friday, 27th June 2013, hence the machine is drained. We apologize for any inconveniences this may cause. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/compute/aktuell/ali4613/ Matthias Brehm

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Upd:SuperMUC: Scheduled Maintenance June 24-27
by LRZ aktuell June 27, 2013

June 27, 2013

Changes to this message: Update Upd: Dear users of the SuperMUC Petaflop system at LRZ, the scheduled maintenance is finished and the system is back in operation. More details about changes in the work environment will follow. Thanks for your patience! ----------------------------------------------------------------------- Dear users of the SuperMUC Petaflop system at LRZ, due to a scheduled maintenance the system will become temporarily unavailable for user operation from June 24, 8:00 am onward. Because we are preparing to improve the energy efficiency of the system, calibration runs will need to be performed in addition to software updates. Therefore, this maintenance is expected to last four days. A list with the changes to the system software will be published via this document once ready. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/supermuc/aktuell/ali4598/ Reinhold Bader

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PRACE PATC Course: Introduction to SuperMUC- the 3 Petaflop Supercomputer at LRZ
by LRZ aktuell June 27, 2013

June 27, 2013

----------------------------------------------------------------------- +---------------------------------------------------------------------+ | Date: |July 8-11, 2013 10:00 - 17:00 | |-------------+-------------------------------------------------------| | Location: |LRZ Building, University campus Garching, near Munich | | |(Lecture room H.E.009) | |-------------+-------------------------------------------------------| | |This four-day workshop gives an introduction to the | | |usage of the new Petaflop class Supercomputer at LRZ, | | |SuperMUC. The first three days of this are dedicated to| | |presentations by Intel on their software development | | |stack (compilers, tools and libraries); the remaining | | |day will be comprised of talks and exercises delivered | | |by IBM and LRZ on usage of the IBM-specific aspects of | | |the new system (IBM MPI, LoadLeveler, HPC Toolkit) and | | |recommendations on tuning and optimizing for the new | | |system. | | | | | |The following schedule is preliminary and may undergo | | |changes. | | | | | |Monday schedule: | | | | | | * Introduction to the x86 Westmere and Sandy Bridge | | | Processor Architecture | | | * Usage of Intel Compilers: switches, optimization, | | | profiling, OpenMP, advanced features | | | * Usage of the Intel debugger | | | * Explicit and compiler-directed vectorization with | | | SSE and AVX | | | | | |Tuesday schedule: | | | | | Contents: | * Programming for NUMA | | | * Intel Cilk Plus | | | * Fortran standard support and extensions in Intel | | | Fortran | | | * Intel Inspector XE (correctness checking for memory| | | and threading) | | | * Threading Building Blocks, OpenCL and other | | | parallel programming models | | | * Static Security Analysis | | | * Performance Libraries (MKL, IPP) | | | * VTune Amplifier XE (performance analysis) | | | | | |Wednesday schedule: | | | | | | * Intel Performance Monitoring Unit (PMU) and other | | | performance analysis tools | | | * Intel Cluster Tools Overview and Usage | | | * Intel Many Integrated Core (MIC) Architecture | | | * A case study illustrating the use of the Intel | | | toolchain | | | | | |Thursday schedule: | | | | | | * Using LoadLeveler for batch queuing | | | * IBM's parallel environment | | | * Performance Tools (High Performance Toolkit, | | | Eclipse User Interface) including a demonstration. | |-------------+-------------------------------------------------------| | |Participants should have good knowledge of HPC-related | |Prerequisites|programming, in particular MPI, OpenMP and at least one| | |of the languages C, C++ or Fortran. | |-------------+-------------------------------------------------------| | Language: |English | |-------------+-------------------------------------------------------| | |Heinz Bast, Georg Zitzlsberger (Intel), Achim | | Teachers: |Boemelburg, Florian Merz, Christoph Pospiech (IBM), LRZ| | |staff | |-------------+-------------------------------------------------------| | |Please register via the LRZ registration form: http:// | |Registration:|www.lrz-muenchen.de/services/schulung/kursanmeldung | | |(select course HMUC1S13) | +---------------------------------------------------------------------+ Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/compute/aktuell/ali4612/ Matthias Brehm

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PRACE PATC Course: Introduction to SuperMUC
by LRZ aktuell June 27, 2013

June 27, 2013

Date: July 8-11, 2013 10:00 - 17:00 Location: LRZ Building, University campus Garching, near Munich (Lecture room H.E.009) This four-day workshop gives an introduction to the usage of the new Petaflop class Supercomputer at LRZ, SuperMUC. The first three days of this are dedicated to presentations by Intel on their software development stack (compilers, tools and libraries); the remaining day will be comprised of talks and exercises delivered by IBM and LRZ on usage of the IBM-specific aspects of the new system (IBM MPI, LoadLeveler, HPC Toolkit) and recommendations on tuning and optimizing for the new system. The following schedule is preliminary and may undergo changes. Monday schedule: * Introduction to the x86 Westmere and Sandy Bridge Processor Architecture * Usage of Intel Compilers: switches, optimization, profiling, OpenMP, advanced features * Usage of the Intel debugger * Explicit and compiler-directed vectorization with SSE and AVX Tuesday schedule: Contents: * Programming for NUMA * Intel Cilk Plus * Fortran standard support and extensions in Intel Fortran * Intel Inspector XE (correctness checking for memory and threading) * Threading Building Blocks, OpenCL and other parallel programming models * Static Security Analysis * Performance Libraries (MKL, IPP) * VTune Amplifier XE (performance analysis) Wednesday schedule: * Intel Performance Monitoring Unit (PMU) and other performance analysis tools * Intel Cluster Tools Overview and Usage * Intel Many Integrated Core (MIC) Architecture * A case study illustrating the use of the Intel toolchain Thursday schedule: * Using LoadLeveler for batch queuing * IBM's parallel environment * Performance Tools (High Performance Toolkit, Eclipse User Interface) including a demonstration. Participants should have good knowledge of HPC-related Prerequisites programming, in particular MPI, OpenMP and at least one of the languages C, C++ or Fortran. Language: English Teachers: Heinz Bast, Georg Zitzlsberger (Intel), Achim Boemelburg, Florian Merz, Christoph Pospiech (IBM), LRZ staff Please register via the LRZ registration form: http:// Registration: www.lrz-muenchen.de/services/schulung/kursanmeldung (select course HMUC1S13) Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/compute/aktuell/ali4611/ Matthias Brehm

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Netzwartung am 25.6.
by LRZ aktuell June 24, 2013

June 24, 2013

1. TUM Garching Physik-Department Fuer eine Aufruestung des zentralen Switches swz1-1at muessen an diesem einige Umkonfigurationen vorgenommen werden. Zwischen 8:00 Uhr und 9:00 Uhr wird es dadurch zu Unterbrechungen kommen. 2. TUM Weihenstephan, Geb. 4212, Physik, Chemie, Zentrallaboratorium Durch den Austausch des Uplink-Kabels wird es fuer die Anschluesse am Switch swn2-0q8 um 8:00 Uhr zu einer kurzen Unterbrechung kommen. 3. Hochschule fuer Politik, Ludwigstr. 10 M-net hat fuer die Ludwigstr. 10 fuer Donnerstag, den 27.6. zwischen 5:30 Uhr und 6:30 Uhr Wartungsarbeiten angekuendigt. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/netz/aktuell/ali4610/ Wolfgang Beyer

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Upd:Linux Cluster: Serial SLURM processing returned to operation
by LRZ aktuell June 21, 2013

June 21, 2013

Changes to this message: Update Update (June 21, 15:20): SLURM processing is enabled again. All queued and running jobs needed to be deleted, so resubmission of jobs will be required. However, the root cause has only been partially fixed by setting a maximum submitted job number limit (1000). The following additional restrictions on SLURM usage have been added to the user documentation: * Please avoid using more than 10 characters in the job name field. * Please do not submit scripts with - possibly xargs-generated - long argument lists. Generate argument lists for program startup inside a submitted script. Both of the above can lead to overflow of SLURM-internal buffers, amounting to a denial-of-service situation. We intend to put a mechanism in place to enforce the above limits, but this will take some time to implement. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4605/ Reinhold Bader

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Upd:Linux Cluster: Serial SLURM processing again suspended
by LRZ aktuell June 21, 2013

June 21, 2013

Changes to this message: Problem has recurred Update (June 21, 9:15): Unfortunately, the problem has recurred. We're working on it. Update: SLURM processing is enabled again. However the root cause has only been partially fixed by setting a maximum submitted job number limit (1000). Please avoid using more than 10 characters in the job name field. Also note that all queued and running jobs needed to be deleted, so resubmission of jobs will be required. ----------------------------------------------------------------------- Due to a combination of a too long job queue and a SLURM configuration problem, job management on the serial cluster segment is presently not working. We are working on fixing the problem and will notify you via this document once it is resolved. Apologies for the disruption. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4605/ Reinhold Bader

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