July 2012 - aktuell - lists.lrz.de

Wartungsarbeiten am Secomat-NAT-Gateway 01.08.2012 07:30 Uhr
by LRZ aktuell July 31, 2012

July 31, 2012

Am Mittwoch, 01.08.2012 werden ab 07:30 Uhr ausserplanmaessig Wartungsarbeiten am LRZ-Secomat (NAT-Gateway fuer private IP-Adressen im Muenchner Wissenschaftsnetz) durchgefuehrt, um durch einen aktuellen Hardwaredefekt bedingte Einschraenkungen der Redundanz zu beseitigen. Bei regulaerem Verlauf der Wartungsarbeiten tritt keine Beeintraechtigung des Dienstes auf. Sollten doch Probleme auftreten, steht der Dienst im Zeitfenster zwischen 07:30 und 08:00 Uhr fuer ca. 10 Minuten nicht zur Verfuegung. Betroffen von der potentiellen Stoerung sind alle Nutzer in den hier angegebenen Netzen: http:// www.lrz.de/fragen/faq/netz/netz7/ Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/netzdienste/aktuell/ali4375/ Wolfgang Hommel

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Upd:Call for Papers: PPHPS 2012 Special Journal Issue
by LRZ aktuell July 30, 2012

July 30, 2012

Changes to this message: Deadline extended Note: the deadline for submission has been extended. See below for the new date. ----------------------------------------------------------------------- Analysis of Performance and Power for Highly Parallel Systems Special issue of Concurrency and Computation: Practice and Experience (CCPE) ----------------------------------------------------------------------- This special issue will be focused on how performance and power properties of modern highly parallel systems can be analyzed using state-of-the-art modeling and analysis techniques, and real-world applications and tools. Complex, hierarchical architectures are now the standard for almost all highly parallel computer systems. Without a good grip on relevant performance limitations any optimization attempt is just a shot in the dark. Hence, it is vital to fully understand the performance properties and bottlenecks that come about with clustered multi- & many-core, multi-socket nodes. Another crucial aspect of modern systems is the complex interplay between power constraints and the need for compute performance. The challenges ahead are many-fold as systems scale in size. While parallelism is increasing, memory systems, interconnection networks, storage, and uncertainties in programming models all add to the complexities. More rapid realization of energy savings will require significant increases in measurement resolution and optimization techniques. The interplay between performance, power, and reliability also leads to complex trade-offs. Of particular interest are papers that identify and analyze novel ideas rather than providing incremental advances in the following areas: * Performance modeling techniques at core, socket, node, and system levels * State-of-the-art tools for analyzing performance and power * Novel techniques that enable power and/or energy optimizations * Experiences from current large-scale systems and applications * Analysis of future technologies that will provide improved energy efficiency ----------------------------------------------------------------------- Submission Guidelines Work that is submitted to this special issue must not have been previously published or currently being considered by other journal or conference venues. However, the papers that have been previously published with reputed conferences can be considered for publication in the special issue if they are substantially revised with at least 30% new content. Every submitted paper will receive at least three reviews. There is a 20 page max length limit (12 point single space, inclusive of figures and tables). Wiley has LaTeX templates that can be used by authors. Either LaTeX or Word submissions will be accepted. Submissions should be made through Manuscript Central (http://mc.manuscriptcentral.com/ cpe) and must refer to "PPHPS 2012 special issue" in step 4 of the submission process. The CCPE submission guidelines can be found at http://www.cc-pe.net/journalinfo/authors.html Please also note the additional instructions for submission to CCPE special issues at http://www.cc-pe.net/journalinfo/issues/authorinstructions.html ----------------------------------------------------------------------- Important Dates Submission deadline (extended): August 13th 2012 Notification of acceptance: September 16th 2012 Final Papers due: November 11th 2012 Final Decisions: December 14th 2012 ----------------------------------------------------------------------- Special Issue Guest Editors Georg Hager University of Erlangen, Germany Darren J. Kerbyson Pacific Northwest National Laboratory, USA Abhinav Vishnu Pacific Northwest National Laboratory, USA Gerhard Wellein University of Erlangen, Germany This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4345/ Reinhold Bader

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Netzwartung am 31.7.
by LRZ aktuell July 30, 2012

July 30, 2012

1. Zentrale Netzdienste (Secomat, Mail usw.) Zwischen 7:30 Uhr und 9:00 Uhr wird ein Chassis des virtuellen Routers vss1-2wr in den neu gebauten Teil unseres Rechnergebaeudes umgezogen. Durch die Verteilung auf zwei getrennte Brandabschnitte wird dadurch die Ausfallsicherheit erhoeht. Wegen der bereits gegebenen Redundanz bei den Serveranschluessen sind keine Ausfaelle zu erwarten. Kleine Beeintraechtigungen koennen aber nicht ausgeschlossen werden. (siehe auch http://www.lrz.de/aktuell/ali4372/) 2. TUM Stammgelaende Gebaeude 7 Durch die Integration der neuen Verkabelung kann es zwischen 7:45 Uhr und 9:00 Uhr zu Unterbrechungen kommen. Vorankuendigung: ZHS und Georg Brauchle-Ring am 9./10.8. M-net hat angekuendigt, dass wegen Wartungsarbeiten die Anbindungen der Bereiche Connollystrasse und Georg-Brauchle-Ring am 9.8. ab 22:00 Uhr bis zum 10.8. um 6:00 Uhr unterbrochen sein werden. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/netz/aktuell/ali4373/ Wolfgang Beyer

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Kurze Exchange-Unterbrechungen waehrend Netzwartung am Di. 31.07.2012
by LRZ aktuell July 27, 2012

July 27, 2012

Waehrend der Netzwartungsarbeiten am kommenden Dienstag (31.07.2012) kann es bei Exchange zwischen 7:30 und 8:30 Uhr zu ein bis zwei kurzen Betriebsunterbrechungen von ca. 10 bis 15 Minuten kommen. Wir bitten um Ihr Verstaendnis. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/aktuell/ali4372/ Ado Haarer

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Upd:Update: TSM-Hardware Upgrade vom 18.07.2012 wird wegen Krankheit auf den 25.07.2012 verschoben
by LRZ aktuell July 26, 2012

July 26, 2012

Aenderungen an der Mitteilung: Update Der Hardware Upgrade ist erfolgreich beendet. Bei Problemen wenden Sie sich an unser Servicedesk-Portal https://servicedesk.lrz.de/?service=Datenhaltung-Archiv%20und%20Backup& lang=de um einen Incident zu eroeffnen. Wegen eines Hardware Upgrades ist von Mittwoch, den 25.07.2012 von 06: 00 bis ca. Donnerstag, den 26.07.2012 ca. 18:00 Uhr keine Archivierung am SuperMIG moeglich. Wir bitten um Ihr Verstaendnis. In order to be able to keep delivering the familiar service quality for you we perform a hardware upgrade on our Archive and Backup System from Wednesday, 2012-07-25 from 06:00 am to Thursday, 2012-07-26 18:00. Note: Only SuperMic users are affected. We apologize for any inconvenience on your side. Ihr ABS-Team Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/datenhaltung/adsm/aktuell/ali4353/ Monika Hufnagl

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OWA-Vorschau fuer Dateianhaenge wegen Sicherheitsluecke deaktiviert
by LRZ aktuell July 26, 2012

July 26, 2012

Aufgrund einer gestern bekannt gewordenen Sicherheitsluecke in Exchange haben wir wie von Microsoft empfohlen die Vorschau fuer Dateianhaenge in Outlook Web App (OWA) deaktiviert. Das bedeutet, dass z.B. bei PDF- oder Word-Dokumenten keine integrierte Vorschau mehr moeglich ist, sondern diese Dokumente nur mit einer geeigneten Applikation betrachtet werden koennen. Es entfaellt also die bisherige Funktion "Als Webseite oeffnen". Wir sind uns bewusst, dass die Deaktivierung der Vorschaufunktion das Arbeiten unbequemer macht, halten die Massnahme aber aus Sicherheitsgruenden fuer absolut notwendig. Detaillierte Informationen zu der Sicherheitsluecke finden Sie im Heise-Newsticker in der Meldung Microsoft warnt vor Oracle-Luecken in Exchange und Sharepoint http://www.heise.de/newsticker/meldung/ Microsoft-warnt-vor-Oracle-Luecken-in-Exchange-und-Sharepoint-1652251.html Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/aktuell/ali4370/ Ado Haarer

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Upd:Update: TSM-Hardware Upgrade vom 18.07.2012 wird wegen Krankheit auf den 25.07.2012 verschoben
by LRZ aktuell July 26, 2012

July 26, 2012

Aenderungen an der Mitteilung: Update Wegen eines Hardware Upgrades ist von Mittwoch, den 25.07.2012 von 06: 00 bis ca. Donnerstag, den 26.07.2012 ca. 18:00 Uhr keine Archivierung am SuperMIG moeglich. Wir bitten um Ihr Verstaendnis. In order to be able to keep delivering the familiar service quality for you we perform a hardware upgrade on our Archive and Backup System from Wednesday, 2012-07-25 from 06:00 am to Thursday, 2012-07-26 18:00. Note: Only SuperMic users are affected. We apologize for any inconvenience on your side. Ihr ABS-Team Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/datenhaltung/adsm/aktuell/ali4353/ Monika Hufnagl

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Upd:Update: TSM-Hardware Upgrade vom 18.07.2012 wird wegen Krankheit auf den 25.07.2012 verschoben
by LRZ aktuell July 25, 2012

July 25, 2012

Aenderungen an der Mitteilung: Update Wegen eines Hardware Upgrades ist von Mittwoch, den 25.07.2012 von 06: 00 bis ca. Donnerstag 26.07.2012 ca. 12:00 Uhr keine Archivierung am SuperMIG moeglich. Wir bitten um Ihr Verstaendnis. In order to be able to keep delivering the familiar service quality for you we perform a hardware upgrade on our Archive and Backup System from Wednesday, 2012-07-25 from 06:00 am to Thursday 2012-07-26 12:00. Note: Only SuperMic users are affected. We apologize for any inconvenience on your side. Ihr ABS-Team Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/datenhaltung/adsm/aktuell/ali4353/ Monika Hufnagl

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Upd:Linux Cluster: ICE returned to operation
by LRZ aktuell July 25, 2012

July 25, 2012

Changes to this message: returned to user operation Update: A hardware problem has been fixed and the ICE is available again. ----------------------------------------------------------------------- Dear users of the Linux Cluster systems at LRZ, due to a network connectivity loss of presently unknown cause, the ICE has gone offline. We are investigating the problem and will keep you up-to-date about the status via this URL. Apologies for this delay in servicing your requests. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4365/ Reinhold Bader

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Starting user operation of SuperMUC
by LRZ aktuell July 24, 2012

July 24, 2012

Our new system SuperMUC has been ranked as No. 4 of the world's fastest supercomputers. We will start initial user operation with selected projects on July 30, 2012 (10:00 AM). The first projects to access the system have been selected from the last Gauss Call and from those which recently consume the major part of resources on SuperMIG. These users will be contacted by LRZ individually soon. Some time later, LRZ will proceed to ramp up usage until regular user operation will be reached approximately end of August. We ask all users who gain initial access to SuperMUC to be fair by migrating their jobs to the new system as fast as possible and thereby removing their job load from SuperMIG. We expect that during early user operation we still need to flush out glitches. Therefore, early users must expect unannounced or very short-term scheduled maintenances. Early users are encouraged to report any observed problems via the LRZ service desk. Differences between SuperMIG and SuperMUC usage * Node architecture: SuperMUC is comprised of 16-way Sandy Bridge nodes; these are equipped with 32 GBytes of main memory much less than the SuperMIG nodes. Due to OS requirements, probably 26 GBytes per node will be available in user space. LRZ will also allow usage of logical hardware threads (SMT/Hyperthreads), enabling use of up to 32 tasks per node), however this resource is also partially used by OS services, and it is very much application dependent whether any performance improvement can be derived from use of SMT. * Code compatibility: It is highly recommended to rebuild separate executables for use on SuperMUC. While the compilers and basic libraries will be the same as on SuperMIG, the new architecture supports additional instructions (AVX SIMD extension), and IBM has implemented a major new version of the parallel environment (including the MPI library). Both of these may inhibit backward compatibility, and we d like to avoid having to deal with a lot of incidents reporting such (not really solvable) compatibility issues. * File systems: The file systems pointed to by the $SCRATCH and $WORK environment variables will be the new, and vastly larger and better-performing GPFS file systems. The $HOME file system will be still shared between SuperMIG and SuperMUC. We will provide additional information on how to transfer data between the non-shared SuperMIG and SuperMUC file systems via the file system documentation. Documentation The LRZ SuperMUC web page will be updated to reflect the changes discussed above. In particular the new LoadLeveler job classes and keywords and the file systemss will be documented; it may take some time before other parts of the documentation are complete. Diese Information finden Sie im WWW unter http://www.lrz-muenchen.de/services/compute/supermuc/aktuell/ali4369/ Matthias Brehm

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