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Behavior of Unix in calling 2 scripts simultaneously

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# 1  
Old 02-17-2011
Behavior of Unix in calling 2 scripts simultaneously
Hi,

I wanted to know the exact behavior of the shell scripts in the below scenario.

I have 2 scripts - a.ksh and b.ksh
Both these scripts call a 3rd script xyz.ksh.
What will happen if both a.ksh and b.ksh run at the same time?
What will happen if a.ksh starts 2-3 seconds before b.ksh?
Note: xyz.ksh takes a lon time to run say 5 mins.

As per my understanding, both should work fine without any problem.
Also what will happen if both a.ksh and b.ksh are running from the same directory?

Thanks.
# 2  
Old 02-17-2011
It depends on what the scripts are doing. If you have multiple scripts running at the same time and working with and modifying the same resources, you will likely experience unpredictable behavior as they race against each other to get their jobs done.
This User Gave Thanks to alister For This Post:
aster007
# 3  
Old 02-17-2011
A race condition would be like, if they were trying to both write to the same file on disk simultaneously. Process 1 writes "hello", process 2 writes "world", you could get "helloworld", "worldhello", or maybe even "worhello"...

If they're just doing their own thing and not bothering each other they'll get along fine.
This User Gave Thanks to Corona688 For This Post:
aster007
# 4  
Old 02-17-2011
Thnx alister n Corona688. This helps. Smilie
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