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Shell Programming and Scripting

Run a command in parallel

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# 1  
Old 03-06-2008
Run a command in parallel
Hi all,

How do i run a command in parallel 50 times and capturing the result of each run in a separate file

Eg: myApp arg1 > run1.txt
myApp arg1 > run2.txt
:::::::::::::::::::::::::
:::::::::::::::::::::::::
myApp arg1 > run50.txt

The above way is sequential.

Any help is appreciated
Thanks,
Jak
# 2  
Old 03-06-2008
Code:
#!/bin/sh
num=0
while [ $num -lt 50 ]
do
  num=`expr $num + 1`
  myApp arg1 > run${num}.txt &
done

# 3  
Old 03-07-2008
Thanks for the help!

Jak
# 4  
Old 03-07-2008
Quote:
Originally Posted by Smiling Dragon
Code:
#!/bin/sh
num=0
while [ $num -lt 50 ]
do
  num=`expr $num + 1`
  myApp arg1 > run${num}.txt &
done


Use shell arithmetic instead of calling an external command for every iteration:
Code:
num=$(( $num + 1 ))

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