Re: Effect of deleting executables of running programs

[Shriram R <shriram1976@yahoo.com>]

Yes, the nodes were accessing the executable over NFS.

-shriram


--- Brian Pawlowski <beepy@netapp.com> wrote:

> How were the nodes accessing the executable? Over
> NFS?
> 
> > Hi,
> > 
> > Newbie here. I am not sure if I am sending this
> email
> > to the right list.  My apologies if I am not and I
> > would be happy if someone can point me to the
> right
> > mailing list.
> > 
> > We have a 24 node/48 processor cluster in our lab
> with
> > the following specs.
> > 
> > AMD Athlon
> > Redhat 7.3
> > Kernel version - 2.4.19
> > 
> > I had around 10 jobs that had been running on the
> > cluster for about 15 or so days.  These were
> > using a common executable "abcd.out" (compiled in
> > fortran 90).  After they had been running for
> > about 15 days, I made the mistake of deleting
> > abcd.out.  Immediately about
> > 3 or 4 of my jobs crashed with a "bus error". 
> But,
> > some 6-7 of my jobs
> > continued running.  I had 2 questions with regards
> to
> > this :
> >  
> > a) I always thought that once a job is running,
> the
> > executable is
> >    entirely loaded into memory and the abcd.out
> file
> > is no longer needed.
> >    If so, then why does the a running job crash on
> > deleting abcd.out ?  
> >  
> > b) To what extent can I trust that the rest of the
> 6-7
> > jobs that are
> >    running have not been affected by this deletion
> of
> > "abcd.out" ?
> >  
> > Thanks in advance,
> > shriram.
> > 
> > 
> > 	
> > 		
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> 



		
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