Oded Arbel wrote:
Hi List.
I'm using ssh -f to background ssh so I can run the same operation
on multiple machines in parallel
for server in 1 2 ...; do
ssh -f [EMAIL PROTECTED] 'run maintenance task'
pids="$pids $(getSSHpid)"
done
while kill -0 $pids 2>/dev/null; do echo "Waiting.."; sleep 1; done
Havn't checked it, but:
for server in 1 2 ...
do
ssh [EMAIL PROTECTED] 'run maintenance task' &
done
for process in `seq 1 numservers`
do
wait %$process
done
should work.
In particular, running ssh with -f means that it backgrounds itself, and
thus the shell does not keep track over its process number. On the other
hand, running with & (assuming you don't need to put in a password)
means that %1, %2 etc. translate to the processes the shell launched.
The above script (maybe with slightly different syntax) should launch
all jobs concurrently, and exit only after the last of the jobs has exited.
Shachar
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