[StarCluster] run command on all nodes

[Cedar McKay]

What is the easiest way to run terminal commands on each and every node? I can qsub a command as many times as I have hosts, but (perhaps if nodes are busy) nodeX could run the command multiple times, and nodeY not at all.


Our local cluster has something that works like this:

$ rocks run host compute "COMMAND"

That runs COMMAND on every "compute" host.

I'm sort of surprised this functionality isn't totally standard (or is it?) on all clusters. I have gotten tmux going, but it seems both over-complicated, and a bit fragile. Plus, will it scale to a 100 node cluster? Any tips?

best,
Cedar