Re: walltime or cput?

>    I've a question. To limiting the execution time for a job, it's 
> better setting a queue walltime limit or a cput limit? What are the 
> differences?
walltime == total time a job takes as you clock will display
cpu time == time a job is actively running the CPU

If a job runs for 1 hour walltime at 50% CPU it will have 30 minutes cpu 
time.
Cheers,
Ronny