Re: [openMosix-general] starting processes with ssh

[David H. <ha...@ie...>]

I think that is normal behavior.  The "&" makes the process run in a
child process.  When you log off, the parent process ends and so must
all of its children.

The way around this is to use the "at" scheduler.  I typically use
"mosrun" to ensure my program migrates.  Mosrun also gives me
flexibility to define parameters so that my program migrates in the best
way.

David

On Wed, 2003-02-26 at 15:36, Sean \The RIMBoy\ wrote:
> On Wed, 26 Feb 2003, Matthias Rechenburg wrote:
> 
> > Hi Matthias,
> > 
> > On Mittwoch, 26. Februar 2003 09:42, Matthias Faulstich wrote:
> > > Hello!
> > >
> > > I have installed an OpenMosix system on 4 PCs with Debian-GNU-Linux
> > > As advised, i fconfigured the /etc/inittab like this:
> > > l0:0:wait:/bin/mosrun -h /etc/init.d/rc 0
> > > ...
> > > l6:6:wait:/bin/mosrun -h /etc/init.d/rc 6
> > >
> > > With this configuration, loggin in with ssh binds all processes started
> > > within the ssh-shell to the node on which ssh logged into.
> 
> I've seen this behavior with OpenSSH and it not being particular to Mosix 
> or OpenMosix.  Will the processes migrate if the users su - to themselves 
> and then start their jobs?
> 
> > > It is Ok, that ssh starts only on the node in which it logged in and is
> > > prevented itself from migration. But  - my users shall be able to start
> > > their own processes out of a ssh-shell which then shall migrate.
> 
> Yeah, that sounds like the problem we discovered.  Not sure why openssh is 
> not behaving properly in that regard.
> 
> Give this a try:
> 
> slogin user@node
> su - user
> progtoexecuteandmigrate &
> 
> see if the program migrates accordingly.  We discovered it with our 
> beowulf cluster.  We could telnet in just fine and execute, but attempts 
> to ssh in, execute and background, then logoff met with the executeable 
> dying upon logoff.  I'd really like to know why this happens and why it's 
> a bug that's not been fixed in openssh (then again, I don't know if I'd 
> want to submit a bug report to Theo).
> 
> Sean...
> 
> --
> Believing I had supernatural powers, I slammed into a brick wall.
> 	--Paul Simon
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> 
> 
> 
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