Pierre

Description

Pierre is a small cluster made of 2 nodes only, but both hosting a large number of cores and large amount of RAM memory. In particular, it is equipped with the following hardware/software:

• 1 node with 2 x CPU Intel Xeon L5640 2.27 GHz (12 cores), 48 GB of RAM, 2 x 140 GB HD SAS (connected in Raid 1), 2 x 1 TB HD SATA (connected in Raid 1), OS Red Hat Enterprise Linux release 5.5.
• 1 node with 4 x CPU AMD Opteron 6282 SE (32 cores), 256 GB of RAM, 5 x 600 GB HD SAS (connected in Raid 5 + spare disk), Infiniband, OS Red Hat Enterprise Linux release 5.5.

for a total of 2 nodes, 64 cores.

Access

• Linux and Mac OS users can login within the DiSC internet connection using a terminal with the command:

ssh account@192.168.9.85

or from outside the Department using

ssh -p 50004 account@147.162.63.10

where "account" is the user's account.

• Windows users can use an interface program to the ssh service, e.g. Putty.

Queues

The queue manager is PBS and the following queues are available:

• pierre: max nodes 1, max cores 12, max walltime 336:00:00 (2 weeks)
• x8755m3: max nodes 1, max cores 32, max walltime 1500:00:00 (ca. 2 months)

Example PBS file

A typical PBS input file script will be as follow (see the Support page for more help):

#!/bin/sh --login
#PBS -N jobname
#PBS -A account
#PBS -q queue
#PBS -l nodes=n
#PBS -w time in hh:mm:ss format

commands to execute

where the parts in italic should be changed as appropriate.