HLRN System - News Archive 2015


IDPublished Subject
[2925] Dec 21, 2015Newsletter: Eighteenth edition of HLRN Informationen published
[2920] Dec 09, 2015Konrad: Maintenance finished
[2917] Dec 09, 2015Hannover: MPP1 and MPP2 closed
[2915] Dec 08, 201511th BremHLR-Workshop on "Parallel Programming with MPI and OpenMP"
[2914] Nov 30, 2015Berlin: Maintenance of Konrad on December 8 and 9, 2015
[2911] Nov 24, 2015Brief maintenance of $PERM in Hannover
[2909] Oct 28, 2015Additional commands for the hperm servers in Hannover
[2900] Oct 21, 2015Finished - Maintenance of the PERM file system at HLRN Hannover Oct 26, 2015
[2895] Oct 15, 2015New Cray Development Toolkit CDT 15.09
[2894] Oct 15, 2015In Gedenken an Prof. Dr. Michael Müller-Preußker
[2888] Oct 12, 2015Apply for Computing Time by October 28th, 2015
[2882] Oct 07, 2015Webinar Oct. 15: Gaining Performance through Vectorization using Fortran
[2880] Oct 06, 2015Finished: Maintenance day at HLRN Hannover on Tue Oct 6, 2015
[2874] Sep 30, 2015Hannover: MPP1 and MPP2 closed
[2872] Sep 29, 2015Maintenance day at HLRN Hannover on Tue Oct 6, 2015 09:00 a.m.
[2863] Sep 11, 2015Hannover: MPP1 and MPP2 available again
[2861] Sep 11, 2015Hannover: MPP1 and MPP2 closed
[2852] Aug 07, 2015Solved: Air conditioning problems in Hannover
[2850] Aug 07, 2015Air conditioning problems in Hannover
[2847] Aug 06, 2015HLRN-III Hands-On Workshop, October 28-30, 2015 - Hannover -- Supporting Selected User Application Scenarios for Haswell
[2845] Jul 30, 2015Berlin: Maintenance day at ZIB on August 25, 2015
[2842] Jul 13, 2015Berlin: Konrad available again
[2840] Jul 13, 2015Newsletter: Seventeenth edition of HLRN Informationen published
[2838] Jul 08, 2015Final Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2837] Jul 07, 2015Konrad: Maintenance on Monday, July 13, 2015
[2835] Jul 06, 2015Apply for Computing Time by July 28th, 2015
[2832] Jul 03, 20153rd Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2831] Jun 25, 20152nd Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2827] Jun 23, 2015Hannover: Archive system maintenance finished
[2824] Jun 16, 2015Hannover: Archive system maintenance Tue June 23rd, starting 08:30 a.m.
[2822] Jun 11, 2015Intel Parallel Computing Workshop
[2818] Jun 10, 2015Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2817] May 18, 2015Reformatting and deletion of the Berlin WORK1 file system on July 13, 2015
[2815] May 13, 2015Making good use of the HLRN III Phase 2
[2812] May 13, 2015HLRN-III Hands-On Workshop, June 1-3, 2015 - Hannover -- Porting Selected Applications for Haswell
[2808] Apr 30, 2015Hannover: Archive system maintenance Thu May 7th, 11:00-15:00
[2805] Apr 29, 2015Hannover: Maintenance finished
[2804] Apr 24, 2015Hannover: Maintenance on Wednesday, Apr 29
[2801] Apr 21, 2015Hannover: Archive System is available again
[2796] Apr 16, 2015Konrad: Maintenance of the Archive System ($PERM) in Berlin
[2792] Apr 16, 2015Hannover: MPP1 and MPP2 available again
[2789] Apr 16, 2015Hannover: MPP1 and MPP2 down
[2787] Apr 02, 2015Apply for Computing Time by April 28th, 2015
[2777] Mar 23, 2015New Filesystem WORK2
[2767] Feb 17, 2015PERM (archive) file system in Hannover available
[2763] Jan 30, 2015Finished: Maintenance in Hannover
[2753] Jan 19, 2015Hannover - reboot of hlogin1, hlogin2 and hlogin3
[2745] Jan 16, 2015Konrad: Maintenance on Tuesday, Jan 20
[2748] Jan 16, 2015No password changes on Tuesday, Jan 20
[2741] Jan 13, 2015Hannover: XC30 available again
[2735] Jan 12, 2015Apply for Computing Time by January 28th, 2015
[2737] Jan 07, 2015The maintenance of the HLRN complex in Hannover is
[2733] Jan 05, 2015Courses in Parallel Programming and Single Processor Optimization
[2732] Jan 05, 2015Accounting activated / New Fees and Regulations document (Entgeltordnung)



Newsletter: Eighteenth edition of HLRN Informationen published
[2925] Dec 21, 2015

The eighteenth edition of the HLRN newsletter HLRN Informationen (in German) is available for download at
https://www.hlrn.de/home/view/NewsCenter/NewsLetter.
This web page also contains instructions for (un-)subscribing to the newsletter mailing list.

From the content:
  • Already in the works: HLRN-IV
  • Project report on "With compute power back to the past"
  • More efficient usage of HLRN resources
  • WORK filesystems: Lustre upgrade in Berlin
(wwb)


Konrad: Maintenance finished
[2920] Dec 09, 2015

The maintenance is successfully finished, the system is ready for operation again.

Besides some updates and fixes we installed a new Lustre version and an upgrade of the batch system.

(cs, gla, hhf)


Hannover: MPP1 and MPP2 closed
[2917] Dec 09, 2015

Due to a network problem the MPP1 and MPP2 systems
in Hannover are unavailable.

The SMP1 and SMP2 systems are not affected.

A message will be posted as soon as the MPP systems are
available again.

We apologise for the inconvenience.

(HS)


11th BremHLR-Workshop on "Parallel Programming with MPI and OpenMP"
[2915] Dec 08, 2015

The Bremen Supercomputing Competence Center BremHLR organizes the
    11th BremHLR-Workshop on "Parallel Programming with MPI and OpenMP"
from January 18 to 22, 2016 at the Jacobs University Bremen.

Workshop Contents:
This workshop introduces to parallel programming. The main focus is on the parallel programming models MPI and OpenMP. During the workshop, lectures will introduce the concepts and use of the parallel programming while tutorial exercises allow the participants to get practical experience with MPI and OpenMP.

Lecturers:
The workshop is given by Dr. Hinnerk Stüben (University of Hamburg) and Dr. Lars Nerger (BremHLR and Alfred Wegener Institute, Bremerhaven).

Prerequisites:
Solid fundamentals in Unix as well as C or Fortran will be essential!

Registration:
Please register by email to bremhlr@uni-bremen.de

Registration deadline:
January 4, 2016

Fees:
None - the workshop is for free!

Please find the details about the workshop online at
http://www.bremhlr.uni-bremen.de/events/mpi-openmp-workshop/ .

Kind regards,
Lars Nerger (Alfred Wegener Institute & BremHLR)
Thorsten Coordes (ZARM, University of Bremen)
Achim Gelessus (CLAMV, Jacobs University Bremen)



Berlin: Maintenance of Konrad on December 8 and 9, 2015
[2914] Nov 30, 2015

A system maintenance will be performed on the Berlin complex Konrad

from Tuesday, December 8, 7:00 AM,
until Wednesday, December 9, 2015, late afternoon.

Konrad will be unavailable during this time. All login sessions will be terminated and the batch system will be stopped.

During the maintenance firmware and software upgrades on the storage systems will be made to improve stability. The Lustre file system will be upgraded to version 2.5.4. Therefore, we recommend to copy important data to the PERM archive file system.

(cs, gla)



Brief maintenance of $PERM in Hannover
[2911] Nov 24, 2015

The HLRN archive system will undergo maintenance tomorrow, Wednesday, November 25, 2015 from 10:00 to 14:00h.

During that time, there will be no read or write access to $PERM. We expect to be up and running again right after 14:00h.

Regards, Steffen Schulze-Kremer



Additional commands for the hperm servers in Hannover
[2909] Oct 28, 2015

Hannover now provides some additional commands to facilitate interaction with the archive software. As you know, in Hannover only sftp access is possible on hperm1 and hperm2 (see Data Management in the users guide).

If you want to use these commands, you could add the following lines to your .bashrc:

# Define the perm wrapper commands for
# easier access to the archive system
if [ -f /sw/hlrn/etc/permwraprc ] ; then
. /sw/hlrn/etc/permwraprc
fi

Then log out and back in and try the command shelp for an overview of the commands available.

See the Data Management page for instructions on how to set up passphraseless login to the hperm servers and how to use automated transfers from within scripts.


(gg)




Finished - Maintenance of the PERM file system at HLRN Hannover Oct 26, 2015
[2900] Oct 21, 2015

The maintenance is finished and servers hperm1 and hperm2 are available again. Thank you for your patience.

(gg)


The original message was:
----------------------------
The PERM servers (archive system) at HLRN Hannover will undergo maintenance Monday Oct 26, 2015 starting 10.00 a.m. The maintenance may last the whole day, during which no access to servers hperm1 and hperm2 will be possible.




New Cray Development Toolkit CDT 15.09
[2895] Oct 15, 2015

The new Cray Development Toolkit CDT 15.09 is available for user test on both complexes Konrad and Gottfried.

CDT consists of Cray compilers, Cray Message Passing Toolkit (e.g. MPI), Cray performance tools (e.g. Perftools), libraries (e.g. LibSci, PETSc, Trilinos, FFTW), as well as the GNU Compiler Collection GCC, among others.

HLRN will switch all defaults in CDT from the current version to 15.09 on October 28, 2015 at 10:00.

Users that build and use their own code should test their build and execution chain with the new environment before October 28.

In order to do so call module load new_defaults/15.09 and rebuild your code.

Test the new executable in your batch job by loading the same module before the program call.
If your code uses dynamic shared libraries you need to add the line
export LD_LIBRARY_PATH=${CRAY_LD_LIBRARY_PATH}:${LD_LIBRARY_PATH}
before the call to aprun ....

In order to revert the shell environment to the current defaults, call module unload new_defaults/15.09 .

Please notify HLRN Support if you experience any problems with the new development toolkit.

(wwb)



In Gedenken an Prof. Dr. Michael Müller-Preußker
[2894] Oct 15, 2015

* 26.09.1946     + 12.10.2015

Wir verlieren mit Michael Müller-Preußker einen hoch geschätzten und klugen Mitstreiter für die Förderung des High Performance Computing in Deutschland. Der Aufbau des Supercomputerverbundes der Norddeutschen Bundesländer (HLRN) war ihm ein besonderes Anliegen, für das er sich unermüdlich eingesetzt hat. Darüber hinaus hat er sich viele Jahre ehrenamtlich als Mitglied des Wissenschaftlichen Ausschusses des HLRN engagiert und mit seinem großen Sachverstand sowie seiner feinfühligen Art die Entwicklung des Verbundes mitgestaltet. Wir vermissen ihn und sind dankbar für sein vielfältiges Wirken.

Wir trauern mit seinen Angehörigen.

Die Mitarbeiterinnen und Mitarbeiter des Norddeutschen Verbundes für Hoch- und Höchstleistungsrechnen (HLRN).

Ein Nachruf: http://people.physik.hu-berlin.de/~plefka/Nachruf-MMP.pdf


Apply for Computing Time by October 28th, 2015
[2888] Oct 12, 2015

The Scientific Board of the HLRN is inviting project proposals applying for computing time on the HLRN system.

The next deadline is October 28th, 2015, at 23:59.

Projects that need more computing time than 10,000 NPL resource units per quarter are invited to submit a project proposal ("Großprojektantrag") to the Scientific Board ("Wissenschaftlicher Ausschuss") of HLRN for the next quarterly review. Resources are allocated for one year starting January 1st, 2016, on a quarterly basis after review of the proposal (see the Application HowTo and the Scientific Board portal page). In 2016 HLRN allocates about 130 million core hours per quarter (equivalent to about 42 million NPL per year) to successful proposals.

Please note: The project abstract has to be created in a certain format. The appropriate HLRN LaTeX template can be downloaded from the HLRN web page "required documents". The use of this template is required.

In case of questions, please contact your local HLRN support person or your HLRN project consultant before submitting the proposal.

(wwb)



Webinar Oct. 15: Gaining Performance through Vectorization using Fortran
[2882] Oct 07, 2015

The effective use of modern processor's SIMD units for computations is more relevant than ever. It is important to leverage and optimize usage of SIMD units to maximize efficiency in performance. However, in case of complex loop structures the introduction of SIMD can become a challenge. We will present coding patterns that draw on using explicit vector data types together with compiler directives to operate on these vectors. The focus will be on SIMD-enabled functions, branching, early return from functions, and loop execution on SIMD lanes. We will contrast our approach with pure OpenMP 4.0 SIMD functionality, and demonstrate how to work around current limitations. This will be proven with real code, using VASP code (https://www.vasp.at ) as a case study.

This IPCC Webinar is hosted at ZIB in Berlin. For registration and further information please visit https://attendee.gotowebinar.com/register/8242145139124925441 .

Anybody can join but registration is required (free of charge).

(tst/wwb)



Finished: Maintenance day at HLRN Hannover on Tue Oct 6, 2015
[2880] Oct 06, 2015

Maintenance at HLRN complex Hannover is finished and the system is open again. Thank you for your patience and happy computing!

Your HLRN team

(gg)



Hannover: MPP1 and MPP2 closed
[2874] Sep 30, 2015

Due to a problem with the shared filesystems
the MPP1 and MPP2 systems in Hannover are unavailable.

The SMP1 and SMP2 systems are not affected.

A message will be posted as soon as the MPP systems are
available again.

We apologise for the inconvenience.

(HS)



Maintenance day at HLRN Hannover on Tue Oct 6, 2015 09:00 a.m.
[2872] Sep 29, 2015

HLRN Hannover has scheduled maintenance for Tue Oct 6th, 2015. Access will be closed starting 09:00 a.m., interactive sessions are then terminated without further warning. Before that, the scheduler will only start jobs that can be finished in time. In case you want to make use of the drain time before the maintenance, consider submitting jobs with shorter walltimes.

The maintenance is expected to take the whole day. HLRN Berlin is not affected. A message will be posted when the system is reopened again.

Please plan accordingly.

(gg)



Hannover: MPP1 and MPP2 available again
[2863] Sep 11, 2015

the MPP1 and MPP2 systems in Hannover are available again.

Yours sincerely
HLRN Team

(HS)


Hannover: MPP1 and MPP2 closed
[2861] Sep 11, 2015

Due to a problem with the Data Virtualization Services,
the MPP1 and MPP2 systems in Hannover are unavailable.

The SMP1 and SMP2 systems are not affected.

A message will be posted as soon as the MPP systems are
available again.

We apologise for the inconvenience.

(HS)



Solved: Air conditioning problems in Hannover
[2852] Aug 07, 2015

the XC30 component in Hannover is available again.

Yours sincerely
HLRN Team

(HS)


Air conditioning problems in Hannover
[2850] Aug 07, 2015

A room conditioner failed yesterday around 19:10 in Hannover, which in turn triggered an emergency shut down of 4 racks of the XC 30 due to rising temperatures.

We apologize for the resulting inconveniences and are working on putting the machine back to service.

Your HLRN team

(gg)


HLRN-III Hands-On Workshop, October 28-30, 2015 - Hannover -- Supporting Selected User Application Scenarios for Haswell
[2847] Aug 06, 2015

Dear HLRN-Users,

due to the success and feedback from the latest event of this kind HLRN and Cray are planning for a next, special hands-on user workshop.

Core topics:
Porting and optimising selected applications, especially for the Intel Haswell architecture resources provided by HLRN-III phase 2.
The focus is on real user application scenarios ready to be worked on in the workshop.

Date of the workshop:
October 28-30, 2015 (probably 2 to 3 days within this time frame).

Location:
Leibniz Universitaet IT Services (LUIS),
Leibniz Universitaet Hannover,
Schlosswender Str. 5,
30159 Hannover.

During the workshop, Cray will support the porting and optimisation with on-site consultants. It is intended that workshop participants will be able to work with Cray on their code, live on HLRN resources. Therefore, it might be necessary to further plan for individual fixed time frames for special tasks and participating groups within the workshop.

If you are interested in applying for actively participating, please reply to
rueckemann@rrzn.uni-hannover.de
until August 28, 2015

In your mail please carefully comment on the following items in order to enable further planning from HLRN and Cray side:

- The application/code, which you are interested to port/optimise.

- The number of participants/names who will attend from your side.

- The preference for a special day within the workshop for your participation. However, if in reasonable urgent cases the above time frame is not possible for you then you might note this so HLRN and Cray might investigate for some alternative date with you.

Looking forward to hearing from you and seeing you in Hannover!

Kind regards, your HLRN-Team!



Berlin: Maintenance day at ZIB on August 25, 2015
[2845] Jul 30, 2015

The annual infrastructure maintenance will be performed at ZIB on Tuesday, August 25, from 6:00 until approximately 18:00. Some HLRN services will be partially or fully unavailable for ALL users during that time.

Note: The compute service on Konrad including all file systems will be unavailable until Wednesday, August 26, 2015, before noon.

Our schedule is:
  • At 6:00 shutdown of Konrad. All login sessions will be terminated.
  • Between 8:00 and approx. 17:00:
    • ZIB may be partially or entirely cut off from electric power and from the internet.
    • ZIB personnel can be contacted by phone, only.
    • Email traffic to/from ZIB will be interrupted, but mail will not get lost.
    • The HLRN web server (www.hlrn.de) will be unavailable.
    • The HLRN Service Portal including the user and project database server (zulassung.hlrn.de) will be unavailable.
    • The licence server for the packages ABAQUS, ANSYS, Fluent, and Totalview (all licensed by ZIB) will be unavailable.
  • Approximately 18:00: HLRN services except Konrad are expected to be restored.
  • Due to additional maintenance work on the global WORK file systems we expect Konrad to be available again on Wednesday, August 26, 2015, before noon.
The HLRN mail servers will remain available during the maintenance.

Please plan accordingly.

(wwb)



Berlin: Konrad available again
[2842] Jul 13, 2015

The maintenance is finished, Konrad is available again.

During the maintenance the Lustre file system WORK1 was reformatted and a Lustre patch for better stability was installed.

The Lustre quota accounting was re-enabled (you can use the command "lfs quota" again to see your current disk usage), but quota enforcement is still disabled.

If you experience any problems with the system please notify support@hlrn.de as soon as possible.

Remember: WORK1 and WORK2 file systems provide scratch space, only. There is no backup, and their contents may be deleted at any time on short notice.

(gla)



Newsletter: Seventeenth edition of HLRN Informationen published
[2840] Jul 13, 2015

The seventeenth edition of the HLRN newsletter HLRN Informationen (in German) is available for download at
https://www.hlrn.de/home/view/NewsCenter/NewsLetter.
This web page also contains instructions for (un-)subscribing to the newsletter mailing list.

From the content:
  • HLRN-III in its final configuration
  • Project report on "Numerische Modellierung granularer Ladung auf Massengutfrachtern"
  • Vorbereitet für neue Technologien: Many-Core Computing am ZIB
  • News about HLRN-III
(wwb)



Final Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2838] Jul 08, 2015

This is our final reminder regarding this matter:

To improve its stability and reliability, the Berlin WORK1 file system containing the user subdirectories /gfs1/work/userid will be deleted and reformatted on Monday, July 13, 2015.

This implies a complete loss of your data in WORK1 (/gfs1/work/userid)!

For the details please see our announcement 2818.

(wwb)


Konrad: Maintenance on Monday, July 13, 2015
[2837] Jul 07, 2015

A system maintenance (including the Lustre reformatting as announced earlier) will be performed on the Berlin complex Konrad

from Monday, July 13, 2015, 9:00 until the afternoon.

Konrad will be unavailable during this time.

All login sessions will be terminated and the batch system will be stopped at 9:00.

We will post a note when Konrad is online again.

(gla)


Apply for Computing Time by July 28th, 2015
[2835] Jul 06, 2015

The Scientific Board of the HLRN is accepting project proposals applying for computing time on the HLRN system.

The next deadline is July 28th, 2015, at 23:59.

Projects that need more computing time than 10,000 NPL resource units per quarter are invited to submit a project proposal ("Großprojektantrag") to the Scientific Board ("Wissenschaftlicher Ausschuss") of HLRN for the next quarterly review. Resources are allocated for one year starting October 1st, 2015, on a quarterly basis after review of the proposal (see the Application HowTo and the Scientific Board portal page). In 2015 HLRN allocates about 130 million core hours per quarter (equivalent to about 42 million NPL per year) to successful proposals.

Please note: The project abstract has to be created in a new format. The appropriate HLRN LaTeX template can be downloaded from the HLRN web page "required documents". The use of this template is required.

In case of questions, please contact your local HLRN support person or your HLRN project consultant before submitting the proposal.

(wwb)



3rd Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2832] Jul 03, 2015

This is our third reminder regarding this matter:

To improve its stability and reliability, the Berlin WORK1 file system containing the user subdirectories /gfs1/work/userid will be deleted and reformatted on Monday, July 13, 2015.

This implies a complete loss of your data in WORK1 (/gfs1/work/userid)!

For the details please see our announcement 2818.

(wwb)


2nd Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2831] Jun 25, 2015

This is our second reminder regarding this matter:

To improve its stability and reliability, the Berlin WORK1 file system containing the user subdirectories /gfs1/work/userid will be deleted and reformatted on Monday, July 13, 2015.

This implies a complete loss of your data in WORK1 (/gfs1/work/userid)!

For the details please see our announcement 2818.

(wwb)


Hannover: Archive system maintenance finished
[2827] Jun 23, 2015

PERM / qfs1 Hannover is available again.

Thank you for your patience,

Your HLRN team

(gg)


The original message was:
---------------------------
The archive system (a.k.a. PERM, qfs1) in Hannover will
undergo maintenance starting Tue June 23rd 08:30 a.m.
[...]



Hannover: Archive system maintenance Tue June 23rd, starting 08:30 a.m.
[2824] Jun 16, 2015

The archive system (a.k.a. PERM, qfs1) in Hannover will undergo maintenance starting Tue June 23rd 08:30 a.m.

Both hperm servers and access to the archive will be blocked during that time, sessions still open at 08:30 will be terminated without further notice. The maintenance may take the whole day to complete.

The archive system in Berlin is not affected by this announcement.

A message will be posted when PERM Hannover is available again.

Please plan accordingly.

(gg)




Intel Parallel Computing Workshop
[2822] Jun 11, 2015

Dear Code Developer and HPC Enthusiast,

to meet future scientific and commercial computing demands, systems today and even more in the future support very high numbers of processor cores and extended SIMD computing capability. Future performance gains will come through parallelism, and modernizing key applications will help us make the next leap in discovery. Code modernization is expected to enable large performance increases while maintaining the code portability users expect.

The IPCC Team at ZIB and Intel is pleased to invite you to a workshop providing up-to-date information about Parallel Programming techniques for your code modernization work.


Zuse Institute Berlin, Germany, 16th - 17th June

For details and registration, please go to: http://programming-workshops.com


We look forward to seeing you soon!

Your IPCC Team at ZIB and the Intel Programming Workshop Team

(tst)


Reminder: Deletion and reformatting of the Berlin WORK1 file system on July 13, 2015
[2818] Jun 10, 2015

To improve its stability and reliability, the Berlin WORK1 file system containing the user subdirectories /gfs1/work/userid will be deleted and reformatted on Monday, July 13, 2015.

This implies a complete loss of your data in WORK1 (/gfs1/work/userid)!

You are responsible for copying/moving your important data to other file systems like WORK2, HOME, or PERM until July 12, 2015.

Do not wait anymore, start copying your data now! Due to possible high network traffic, last minute file transfers may not succeed.

To speed up the file copy process, HLRN provides the command "mcp" (module load mutil),

Use the WORK2 file system with the user subdirectories /gfs2/work/userid for storing your temporary work data, e.g. in batch jobs.

Remember: WORK1 and WORK2 file systems provide scratch space, only. There is no backup, and their contents may be deleted at any time on short notice. Please see also our DataHandling topic.

(wwb)


Reformatting and deletion of the Berlin WORK1 file system on July 13, 2015
[2817] May 18, 2015

To improve its stability and reliability, the Berlin WORK1 file system containing the user subdirectories

/gfs1/work/userid

will be reformatted on

Monday, July 13, 2015.

This implies a complete loss of your data in WORK1 (/gfs1/work/userid)!

Please copy/move the data you would like to keep to other file systems like WORK2, HOME, or PERM by July 12, 2015, at the latest.

Please, start copying your data now. Due to possible high network traffic, last minute file transfers may not succeed.

To speed up the file copy process, HLRN provides the command "mcp" (module load mutil). "mcp" is a replacement for the standard Linux command "cp" allowing for improved performance.

(ct,ml,gla)


Making good use of the HLRN III Phase 2
[2815] May 13, 2015

During the end of 2014 the HLRN III was substantially extended with new hardware. The number of compute nodes has more than doubled. Many users still seem to use the older and smaller phase 1 partition, only, thereby limiting themselves in performance and throughput.

Here is a short information on how users can benefit from the extension.

1. Review all your submission scripts. Changing from batch feature=mpp1 to feature=mpp will adress all (old and new) mpp nodes for the job execution. This allows for a shorter job turnaround time and a better job throughput.

2. Recompile your programs for the Haswell CPUs (MPP2) for potentially better performance on the new nodes.

For more details please see our topic on "Making good use of HLRN III Phase 2" and further references therein.

Please also note the newly added topics in our user documentation at https://www.hlrn.de/home/view/System3 , most notably on "Programming and Using the SMP System", and the special MPP2 topics.

(wwb)



HLRN-III Hands-On Workshop, June 1-3, 2015 - Hannover -- Porting Selected Applications for Haswell
[2812] May 13, 2015

Dear HLRN-Users,

HLRN and Cray are planning for a next, special hands-on user workshop.

Core topics:
Porting and optimising selected applications, especially for the Intel Haswell architecture resources provided by HLRN-III phase 2.

Date of the workshop:
June 1-3, 2015 (probably 2 to 3 days within this time frame).

Location:
Leibniz Universitaet IT Services (LUIS),
Leibniz Universitaet Hannover,
Schlosswender Str. 5,
30159 Hannover.

During the workshop, Cray will support the porting and optimisation with on-site consultants. It is intended that workshop participants will be able to work with Cray on their code, live on HLRN resources. Therefore, it might be necessary to further plan for individual fixed time frames for special tasks and participating groups within the workshop.

If you are interested in applying for actively participating, please reply to
rueckemann@rrzn.uni-hannover.de
until May 21, 2015

In your mail please carefully comment on the following items in order to enable further planning from HLRN and Cray side:

- The application/code, which you are interested to port/optimise.

- The intended goal for the required support/optimisation.

- The programming language(s)/codes/libraries/environment required.

- The number of participants/names who will attend from your side.

- The preference for a special day within the workshop for your participation. However, if in reasonable urgent cases the above time frame is not possible for you then you might note this so HLRN and Cray might investigate for some alternative date with you.

Looking forward to hearing from you and seeing you in Hannover!

Kind regards, your HLRN-Team!



Hannover: Archive system maintenance Thu May 7th, 11:00-15:00
[2808] Apr 30, 2015

The archive system (a.k.a. PERM, qfs1) in Hannover will undergo maintenance on Thu May 7th, 11:00-15:00. Both hperm servers and access to the archive will be blocked during that time, sessions still open at 11:00 will be terminated without further notice.

The archive system in Berlin is not affected by this announcement.

A message will be posted when PERM Hannover is available again.

Please plan accordingly.

(gg)




Hannover: Maintenance finished
[2805] Apr 29, 2015

HLRN Hannover is available again.

Happy computing and thank you for your patience,

Your HLRN team

(gg)



The original message was:
-------------------------
Hardware and system maintenance will be performed
on the Hannover complex Gottfried
from Wednesday, April 29, 2015, 9:00, all day.
[...]



Hannover: Maintenance on Wednesday, Apr 29
[2804] Apr 24, 2015

Hardware and system maintenance will be performed on the Hannover complex Gottfried from Wednesday, April 29, 2015, 9:00, all day.
The complex (including logins and the SMP system) will be unavailable during the day. We expect that the system will be back in production early the next day.

All login sessions will be terminated and the batch system will be stopped at 9:00 on Wednesday.

We will post a note when Gottfried is online again.

(hn)



Hannover: Archive System is available again
[2801] Apr 21, 2015

The archive system (PERM) in Hannover is available again.

Yours sincerely
HLRN Team

(HS)



Konrad: Maintenance of the Archive System ($PERM) in Berlin
[2796] Apr 16, 2015

Due to hardware maintenance the $PERM filesystem in Berlin will be unavailable on Monday, April 20 from 9:30 until 11:30.

Data residing on magnetic tapes will not be accessible during the maintenance

We apologize for the inconvenience.

(wwb)



Hannover: MPP1 and MPP2 available again
[2792] Apr 16, 2015

the XC30 system (MPP1/MPP2) in Hannover is available again.

Yours sincerely
HLRN Team

(HS)



Hannover: MPP1 and MPP2 down
[2789] Apr 16, 2015

Due to problems with the climatisation, the XC30 in Hannover (MPP1 and MPP2) has performed an emergency shutdown yesterday at 19:30.

The SMP system is still operational.

A message will be posted as soon as the MPP system is available again.

HLRN Support Team

(hs)


Apply for Computing Time by April 28th, 2015
[2787] Apr 02, 2015

The Scientific Board of the HLRN is accepting project proposals applying for computing time on the HLRN system.

The next deadline is April 28th, 2015, at 23:59.

Projects that need more computing time than 10,000 NPL resource units per quarter are invited to submit a project proposal ("Großprojektantrag") to the Scientific Board ("Wissenschaftlicher Ausschuss") of HLRN for the next quarterly review. Resources are allocated for one year starting July 1st, 2015, on a quarterly basis after review of the proposal (see the Application HowTo and the Scientific Board portal page). In 2015 HLRN allocates about 130 million core hours per quarter (equivalent to about 42 million NPL per year) to successful proposals.

Please note: The project abstract has to be created in a new format. The appropriate HLRN LaTeX template can be downloaded from the HLRN web page "required documents". The use of this template is required.

In case of questions, please contact your local HLRN support person or your HLRN project consultant before submitting the proposal.

(wwb)



New Filesystem WORK2
[2777] Mar 23, 2015

Dear HLRN-Users,

we are proud to announce the installation of a new parallel LUSTRE filesystem WORK2 in Berlin and Hanover. The new filesystem is increased in size (2.3 PB) and will provide better I/O performance. By introducing a second independent LUSTRE we are going to greatly improve the availability of the HLRN compute resources. You can now use the new filesystem by using the $WORK2 variable.

Please keep in mind that both WORK filesystems are scratch. The contents of WORK and WORK2 will be destroyed any time a significant failure occurs. HLRN will decide to reformat a file system if we expect repair of a defective system to take longer than a few days.

Regularly archive your data!

(cs)


PERM (archive) file system in Hannover available
[2767] Feb 17, 2015

The archive system in Hannover (PERM) is now available. Due to security considerations, access to the hperm servers is only possible via sftp from within HLRN (either site, Hannover or Berlin) for the time being.

Your HLRN Team

(gg)


Finished: Maintenance in Hannover
[2763] Jan 30, 2015

The Maintenance in Hannover is finished.

Thank you for your patience.

Yours sincerely
HLRN Team

(HS)


Hannover - reboot of hlogin1, hlogin2 and hlogin3
[2753] Jan 19, 2015

Due to maintenance work the login nodes hlogin1, hlogin2 and hlogin3 will be rebooted at Monday, Jan 19th, 12:30.

Yours sincerely
HLRN Team

(HS)



Konrad: Maintenance on Tuesday, Jan 20
[2745] Jan 16, 2015

Hardware and system maintenance will be performed on the Berlin complex Konrad from Tuesday, January 20, 2015, 8:00 until January 21 in the morning. Konrad will be unavailable during this time.

All login sessions will be terminated and the batch system will be stopped at 8:00 on Tuesday.

We will post a note when Konrad is online again.

(wwb)


No password changes on Tuesday, Jan 20
[2748] Jan 16, 2015

Due to an LDAP server reorganisation password changes will not be possible on Tuesday, Jan 20, 2015 in Berlin and Hannover.

(gla/wwb)


Hannover: XC30 available again
[2741] Jan 13, 2015

the XC30 component in Hannover is available again.

Yours sincerely
HLRN Team

(HS)



Apply for Computing Time by January 28th, 2015
[2735] Jan 12, 2015

The Scientific Board of the HLRN is accepting project proposals applying for computing time on the HLRN system.

The next deadline is January 28th, 2015, at 23:59.

Projects that need more computing time than 10,000 NPL resource units per quarter are invited to submit a project proposal ("Großprojektantrag") to the Scientific Board ("Wissenschaftlicher Ausschuss") of HLRN for the next quarterly review. Resources are allocated for one year starting April 1st, 2015, on a quarterly basis after review of the proposal (see the Application HowTo and the Scientific Board portal page). In 2015 HLRN allocates about 130 million core hours per quarter (equivalent to about 42 million NPL per year) to successful proposals.

Please note: The project abstract has to be created in a new format. The appropriate HLRN LaTeX template can be downloaded from the HLRN web page "required documents". The use of this template is required.

In case of questions, please contact your local HLRN support person or your HLRN project consultant before submitting the proposal.

(wwb)



The maintenance of the HLRN complex in Hannover is
[2737] Jan 07, 2015
finished. The system is fully available again.

Thank you for your patience.

Yours sincerely
HLRN Team

(HS)



Courses in Parallel Programming and Single Processor Optimization
[2733] Jan 05, 2015

Dear HLRN users,

please note my upcoming courses in Parallel Programming and Single Processor Optimization in February. For more information see: the HLRN Events page.

Best regards
Hinnerk Stüben



Accounting activated / New Fees and Regulations document (Entgeltordnung)
[2732] Jan 05, 2015

Since the beginning of January 2015, all user jobs are accounted in terms of NPL. Please use the HLRN Service Portal to check the resource usage of your HLRN user or project account.

For the HLRN usage, a new version of the Fees and Regulations document ( Entgeltordnung) is effective. Essentially, it takes into account the new hardware of HLRN-III phase 2. For more details on accounting at HLRN please see our accounting web page.

The HLRN support staff wishes a Happy New Year.

(ml/wwb)



For even older entries see the HLRN System - News History

 
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