I tried doing the same thing but my supervisor got mad.  We aren't
allowed to use any type of system call in our scripts.  If the system
call is in a perl module it's one thing but not in our code.

system or exec anything that executes from /bin/sh

even though it is so much nicer to do that, especially using find..

-chad





On Fri, 2002-09-20 at 15:01, david wrote:
> Chad Kellerman wrote:
> 
> > Dave,
> > 
> >  Actually in each fork.  I was tarring up information from another
> > server with Net::SSH::Perl.  The full tar ball was written to stdout and
> > I would gzip in on the originating server.  If I did not fork each tar
> > the server would crash in a matter of minutes.  But with the forks I
> > actually contected adn grabbed tar balls from a 100 servers, 8 at a
> > time.
> > 
> 
> yes, now that it make sense to me. the tarring portion of your code is 
> likely to create huge heap (like the share memory module, i think it's call 
> ShareLite or something like that, everytime it pull something back from the 
> share memory, it creates a heap for it. the heap will not go away (because 
> Perl does it's own memory management) until the client exit.). you should 
> verify that if Net::SSH::Perl does something similar. it seems like it can 
> be the case. now, if you create a child process for that, it's the child 
> process that creates the heap, not the parent, so when the child process 
> exit, everything is destoried(code, data stack,heap, etc). that's why you 
> don't see your parent eating up a lot of memory.
> 
> i could be totally wrong but with my experience with ShareLit, the situation 
> is similiar. indeed, we use similar solution as your forking except that we 
> don't fork, we simply exec().
> 
> david
> 
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-- 
Chad Kellerman
Jr. Systems Administrator
Alabanza Inc
410-234-3305

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