How do I send a job to a specific node in PBS/TORQUE?
I think you must specify the node name after nodes.
#PBS -l nodes=abc
However, this doesn't seem to work and I'm not sure why.
This question was asked here on PBS and specify nodes to use
Here is my sample code
#!/bin/bash
#PBS nodes=node9,ppn=1,
hostname
date
echo "This is a script"
sleep 20 # run for a while so I can look at the details
date
Also, how do I check which node the job is running on? I saw somewhere that $PBS_NODEFILE shows the details, but it doesn't seem to work for me.
You can do it like this:
#PBS -l nodes=<node_name>
You can also specify the number of processors:
#PBS -l nodes=<node_name>:ppn=X
Or you can request additional nodes, specified or unspecified:
#PBS -l nodes=<node_name1>[:ppn=X][+<node_name2...]
That gives you multiple specific nodes.
#PBS -l nodes=<node_name>[:ppn=X][+Y[:ppn=Z]]
This requests the specific node with X execution slots from that node, plus an additional Y nodes with Z execution slots each.
Edit: To simply request a number of nodes and execution slots per node:
PBS -l nodes=X:ppn=Y
NOTE: this is all for TORQUE/Moab. It may or may not work for other PBS resource managers/schedulers.
The above answer doesn't work for PBS Pro. The following works for including a list of nodes (node1 and node2).
#PBS -l select=1:host=node1+1:host=node2
For also including the number of processors,
#PBS -l select=1:ncpus=24:host=node1+1:ncpus=24:host=node2
