Articles

Post-processing/3D Visualization

by Philippe Depouilly
Documentation | No Comments

Using 3D visualization with VirtualGL and TurboVNC pre-requisite : - Install and setup on your desktop TurboVNC Viewer Connect to plafrim : module load slurm visu/srun srun-visu The first time, TurboVNC will ask you for a password to secure the X11 session Wait for a result like : Waiting for a slot on a visualization serverUsing 3D visualization with VirtualGL and TurboVNC Desktop 'TurboVNC: visu01:1 (login)' started on display visu01:1 Starting applications specified in /home/login/.vnc/xstartup.turbovnc Log file is /home/login/.vnc/visu01:1.log Launched vncserver: visu01:1 Now, in another terminal, open a new SSH session to plafrim like this: "ssh plafrim -N -L 5901:visu01:5901…

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Intel KNL Seminar

by François Rue
Scientific animation | No Comments

Tuesday, 28 March 2017, from 2pm to 4pm Room : Ada Lovelace (Inria Bordeaux 3rd floor) Programme Xeon Phi Architecture Overview and roadmap - Asma Farjallah , HPC Application Engineer (Intel) & Alexandre Chauvin , HPC Account Executive (Intel) Evaluation and Usability of the Cache Aware Roofline Model on PlaFRIM Knight Landings - Nicolas Denoyelle (TADaaM) Evaluating the impact of Intel KNL memory settings on performance through case studies - Ian Masliah (HiePACS) Exploiting multi-level parallelism on Intel KNL - Terry Cojean (STORM) Exchanges

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KNL Cluster

by François Rue
Documentation, Scientific animation | No Comments

A KNL based cluster (Knights Landing (KNL) ) has been installed in February 2017. The cluster consists of 4 KNL interconnected by OmniPath. Knights Landing (7230) is a highly configurable architecture. Memory bandwidth is one of the common bottlenecks for performance in computational applications. KNL offers a solution to this problem. To do so, the 2nd generation of Intel Xeon Phi (KNL) has on-package high-bandwidth memory (HBM) based on the multi-channel dynamic random access memory (MCDRAM). This memory is capable of delivering up to 5x performance (≥400 GB/s) compared to DDR4 memory on the same platform (≥90 GB/s). The on-package…

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Preemption queue “testpreempt”

by Nathalie Furmento
Documentation | No Comments

The queue "testpreempt" The queue "testpreempt" allows to run jobs outside the usual limits on unused computing resources (during the day but mostly at night and on weekends) without blocking the access to the resources for jobs running on the other queues. This means the jobs can be stopped ("preempted") suddenly at every moment if a regular job needs the ressources. The job will be restarted when the resources become available. The code must regularly backup its state ("checkpoint") and make sure the backup is safe (the job could be stopped while backing up) and be able to restart on…

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iRODS Storage Resource

by Nathalie Furmento
Documentation | No Comments

Introduction An iRODS Storage Resource is available at the MCIA (mésocentre Aquitain). It allows to backup your research data. Information IMPORTANT : Encryption is not available (without authentification). Data are unencrypted both on the disks and on the network. If necessary, you need to encrypt data by yourself. Data are scattered over 7 sites (Bordeaux and Pau). IRODS keeps 3 copies of every file: one nearby the storage resource the data was first copied on, one at the MCIA (near Avakas), one in another storage resource. Default quota : 500Gb. Help : https://redmine.mcia.univ.bordeaux.fr/projects/irods How to use the system One needs…

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