:Parallel SSH Execution and a Single Shell to Control Them All
Parallel SSH Execution and a Single Shell to Control Them All Oct 31, 2008, 01 :31 UTC (2 Talkback[s]) (4243 reads) (Other stories by Ben Martin)
"Why you would need a utility like this when, using openSSH, you can create a file containing your commands and use a bash for loop to run it on a list of remote hosts, one at a time? One advantage of a parallel SSH utility is that commands can be run on several hosts at the same time. For a short-running task this might not matter much, but if a task needs an hour to complete and you need to run it on 20 hosts, parallel execution beats serial by a mile. Also, if you want to interactively edit the same file on multiple machines, it might be quicker to use a parallel SSH utility and edit the file on all nodes with vi rather than concoct a script to do the same edit."
