Running parallel process


 
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# 8  
Code:
script1 > filea &
script2 > filea &
script3 > filea &
script4 > filed &
wait
cat filea fileb filec filed > bigfile

# 9  
Quote:
Originally Posted by sagar_1986
RUN ALL THE FOUR PROCESS AFTER COMPLETING THAT COMBINE THE OUTPUT OF ALL THE FOUR SCRIPT INTO ONE FILE.
No need to shout.

I figured log_1, log_2, log_3, etc were scripts since you were obviously running them. Hence, mystified what you were trying to do.
# 10  
could be like this:-

cat main.sh

Code:
{
sh test.sh > 1.log
sh test2.sh > 2.log
sh test3.sh > 3.log
sh test4.sh > 4.log

cat *.log > combine.log
}

then run sh main.sh... you could see all output combine in 1 file...

OR

Code:
cat main.sh

Code:
{
sh test.sh > 1.log
sh test2.sh >> 1.log
sh test3.sh >> 1.log
sh test4.sh >> 1.log
}


then run sh main.sh... you could see all output combine in 1 file...

Last edited by Scrutinizer; 05-23-2012 at 02:59 PM..
# 11  
but dear friends its not working

after the all scripts completed its not coming out of that script

means


Code:
test1.sh &
test2.sh &
test3.sh &


log_1 > new.txt
log_2 >> new.txt
log_3 >> new.txt


its running all the script but its not executing the appending operation of log.

take one example.

Code:
#test3.sh

while [ $i le 20 ]
do
echo "$1"
i=`expr $i + 1`
done

output

Code:
1
2
3
4
5

the script is getting held at 5 its not operation after this stage as we have to append the logs of four scripts into one
# 12  
If you have GNU Parallel GNU Parallel - GNU Project - Free Software Foundation installed you can do this:
Code:
parallel '{} >{.}.out' ::: sample*.sh

or:
Code:
seq 4 | parallel "sample{}.sh > {}.out"

You can install GNU Parallel simply by:
Code:
wget http://git.savannah.gnu.org/cgit/par...n/src/parallel
    chmod 755 parallel
    cp parallel sem

Watch the intro videos for GNU Parallel to learn more:
https://www.youtube.com/playlist?lis...4C9FF2488BC6D1
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