Shell Programming and Scripting

Hi All,

One of my script runs (approximately) for 20 to 40 hours
Is there any way in unix to find the estimated time required for a shell script(Cron job).ie to find the time required for execution even before the script is executed.
Any discussion(pointers) regarding the same is most welcome.

Not really. You can go by historical run times.

If this is almost all shell you may want to start running the time command on sections of it to find bottlenecks. For example, you may want to change a loop that iterates ten times as ten separate concurrent sub processes and just wait for their completion.

hi jim,

I dont have an issue with execution of the script it is working fine and it take only the required time.
But as this script does many compilations(compiled files are undergoes change regularly), the time used by the script varies to a very large extend.

So I want to predict.

If/when you find out the way to predict the future - let us all know - I want to get get on this gig!

but seriously.... you have to identify what influences the consumed time. Once identified, establish a 'baseline' based on the historical data. Once the 'baseline' is established. take a snapshot of the 'changed' criterias and 'extrapolate' the time based on your 'baseline'.

the historical data is already available.
BUT,
I guess the time taken by a process may depend up on the server load.
So this is NOT POSSIBLE.