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Grimage 10GE network
Update 2015-08
  • grimage-9 is now equiped with a Nvidia K40c GPU (thanks to Nvidia/Inria-GRA partnership).
  • grimage-10 is now equiped with 2 Nvidia Geforce 295, which makes it a 4 GPU machine.
Update 2015-06

The grimage machine room is shut down. As a result, grimage-1 to grimage-8 are shutdown as well, with no plan to be up again soon.

Grimage-9 and grimage-10 (hosted in the cluster machine room along with other machines of Digitalis/Grid'5000) are still available.

Update 2014-05

Intel 10GE cards are removed from the nodes to be used in the ppol nodes.

The Grimage cluster was originally dedicated to support the Grimage VR platform: handle hardware (cameras, etc) and process data (videos captures, etc).

More recently, 10GE ethernet cards were added to some nodes for a new project, making the cluster a mutualized platform (multi-project). Currently, at least 4 projects are using the cluster, requiring a resource management system and deployment system adapted to an experimental platform, just like Grid'5000.

Grimage nodes have big computer cases (4U), with the purpose of being able to host various hardware.

By design, the hardware configuration of the Grimage nodes is subject to changes
  • new generation of video (GPU) cards may be installed over time
  • 10GE network connections may change
  • ...
Current 10GE network setup is as follows
  • One Myricom dual port card is installed on each of grimage-{4,5,7,8}
  • One Intel dual port card is installed on each of grimage-{2,5,6,7}

Connexions are point to point (NIC to NIC, no switch) as follows:

  • Myricom: grimage-7 <-> grimage-8 <-> grimage-4 <-> grimage-5
  • Intel: grimage-2 <=> grimage-5 et grimage-6 <=> grimage-7 (double links)

How to experiment

The default system of the grimage node is design to operate the Grimage VR room.

Using kadeploy is required to adapt the system to other needs (if the default system is not sufficient).

Privileged commands

Currently, the following commands can be run via sudo in exclusive jobs:

  • sudo /usr/bin/whoami (provided for testing the mechanism, should return "root")
  • sudo /sbin/reboot
  • sudo /usr/bin/schedtool
  • sudo /usr/bin/nvidia-smi

encore un test

What is x2x and how to use it

This tip is useful for people that have to work in the Grimage room, with a screen attached to a Grimage machine.

x2x allows to control the mouse pointer and keyboard input of a remote machine over the network (X11 protocol). In the case of the Grimage nodes which have a screen attached, it is very practical because it allows to not use the USB mouse and keyboard, which are sometime buggy (because of the out of norm USB cable extension).

To use x2x:

  1. login locally on the machine (gdm)
  2. run xhost + to allow remote X connections.
  3. from you workstation: run
ssh pneyron@grimage-1.grenoble.g5k -X x2x -to grimage-1:0 -west
  • replace pneyron by your username
  • replace the 2 occurences of grimage-1 by the name of the Grimage node you actually use.
  • make sure you get the ssh configuration to get the *.g5k trick to work (see the tip above)

test test re test

System changelog

a remplir JFS

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