Hi, - I've tried that approach (very similar) already but found that some of the operations would inexplicably fail after about 200 fork()s. I was doing 10 forks() at a time then waitpid()-ing them however Windows NT task manager seemed to think that the perl process was 'leaking' handles tho I couldn't track this leak down.

The 'threads' count in task manager went up and down exactly as expected as did 'handles' for a short while, then it started to go down by less so the number of open handles started growing.

I'm never going to need to (realistically) check logs on more than 5000 workstations at once so I could try dividing the total number by 10 and try slicing the array for each fork since I think forking too much might be one of the problems. My alternative is to try ithreads.