description.md

+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+# Content
+
+- [Description of the cluster](#description-of-the-cluster)
+    - [Node configuration](#node-configuration)
+    - [Storage](#storage)
+            - [Your home directory `/home/<username>`](#your-home-directory-homeusername)
+            - [The `/data/<username>` directory](#the-datausername-directory)
+            - [The /ssd/<username> directory](#the-ssdusername-directory)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+# Description of the cluster
+
+## Node configuration
+
+The configuration has a frontal node, named irma-atlas, and 4 compute nodes.
+
+Frontal node `irma-atlas`:
+
+* 64 cores on 4 sockets (AMD Opteron 6386 SE 2.8 Ghz),
+* 512 GB of RAM,
+* 2.4 TB of storage on SSD, (directory: /ssd)
+* 70 TB for data storage (10'000 rpm HDD), (directory: /data)
+* NFS mount to access laboratory data, (such as /home)
+
+Compute nodes `irma-atlas[1-4]` (x4):
+
+* 24 cores on 2 sockets (Intel Xeon E5-2680 v3 2.50GHz), hyperthreaded
+* 256 GB of RAM
+* 1 TB scratch dir (/scratch)
+* NFS mount to access frontal node data: /ssd and /data
+* NFS mount to access laboratory data, (such as /home)
+
+Since the 25th of novembre 2015, the `irma-atlas4` node has been equipped with 2 NVIDIA K80 GPGPU cards.
+
+Everything is interconnected with both 10Gb Ethernet cards and 40Gb Infiniband cards.
+The workload manager is [slurm](https://computing.llnl.gov/linux/slurm/).
+
+## Storage
+
+From every node, you have access to several storages.
+
+#### Your home directory `/home/<username>`
+
+This directory is meant only to store important files and have to be kept to a minimal size.
+
+#### The `/data/<username>` directory
+
+If this directory does not exist, you must create one, so you don't mix your files with other users. This partition has a size of 50 TB, so you can store big data, like simulation results, compilation-related files and libraries ...
+
+#### The /ssd/<username> directory
+
+If this directory does not exist, you must create one, so you don't mix your files with other users. This partition has a size of 2 TB and is put on SSDs for increased access speed. You can use it to store medium-sized data.
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