Shell Programming and Scripting

hi guys ,

I have 10 scripts
suppose 1.sh , 2.sh ,3.sh ,4.sh ......10.sh
each takes some time ( for instance 2 minutes to 40 minutes )

my server can run around 3-4 files at a time
suppose,
1.sh ,
2.sh ,
3.sh
are running currently now as soon as ANY ONE of the gets finished i want to run next process i.e. 4.sh automatically & so on till 10.sh
there is no dependency in these scripts ....

plz help

Hi.

The command xargs can address such problems. It is found on almost every modern system. See man xargs for details, and, if you run into problems with your experiments, let us know.

Another possibility is the more capable (and complex) parallel, but it's more likely that your system has xargs.

Best wishes ... cheers, drl

hi
tnx to u i have learned xargs command..
bt u knw d problem is not with how many scripts (arguments here ) i run at a time..
The problem is i cant run the next process before the previous process gets finished and CPU is free....
can u plz suggest how will i use 'PARALLEL' command in the given case..
My each script will run and will give o/p as 'procedure executed successfully'
can we use this o/p as some trigger?

Hi.

First, please follow the rules, among them:

Code:

(9) Edit your posts if you see spelling or grammar errors (don't write in cyberchat or cyberpunk style). English only.

See The UNIX and Linux Forums - Forum Rules

Second, try running the command:

Code:

seq 10 20 | xargs -n 1 -P 3 sleep &

then monitor the processes continuously by repeatedly entering:

Code:

ps -f

and you should see that xargs runs several processes, adhering to the limit of 3. The command was suggested by An easy way to run many tasks in parallel at Xaprb

The man xargs page contains some examples as well as a description of the options.

If your repository does not have parallel for you to easily install, see GNU Parallel - GNU Project - Free Software Foundation

Good luck with your experiments.

Best wishes ... cheers, drl

Hey ,
thank you
but I got it using a different approach

I used counter variable to count running using PID ..

then i executed next processes using loop , condition for loop being :
if ( count < allowed )
run next ....

by the way , thank you