Re: [ROOT] Using root with OpenMOSIX

From: Sam Waldman (waldman@HEP.Stanford.EDU)
Date: Thu Jun 13 2002 - 20:12:00 MEST


	Hi Fons,

	Thanks for the fast reply.  I submitted a query to the OpenMOSIX
discussion list and meanwhile poked around their info.  It looks like OM
doesn't migrate the shared libs.  Hopefully they can tell me how to make
it do so.  If they can't,  is there anyway to force ROOT to compile
without using shared libs?

	sam

On 12 Jun 2002, Fons Rademakers wrote:

> Hi Sam,
>
>   I assume Mosix correctly migrates all depending shared libs with the
> jobs? Any idea where it segv's?
>
> Cheers, Fons.
>
>
>
> On Tue, 2002-06-11 at 19:42, Sam Waldman wrote:
> >
> > Hi folks,
> >
> > 	I'm running ROOT on a 5 node redhat-7.3 cluster.  We have
> > installed an OpenMOSIX kernel on each of the machines,  allowing
> > transparent clustering across all 5 machines.  The makers of OpenMOSIX
> > call it "fork and forget",  and for many applications we run,  including
> > large geant applications,  it runs fine --  big jobs automatically migrate
> > around the cluster to the least loaded machine.  Unfortunately,  every
> > time mosix tries to send a root application to another machine,  it
> > segmentation faults.  If the job is locked onto one node,  even a node
> > seperate from the home node,  the job runs fine.
> >
> > 	Does anyone have any experience using root with MOSIX or
> > OpenMOSIX?  Or are there any obvious reasons for this behaviour?  Any help
> > will be greatly appreciated.
> >
> > 	sam waldman
> --
> Org:    CERN, European Laboratory for Particle Physics.
> Mail:   1211 Geneve 23, Switzerland
> E-Mail: Fons.Rademakers@cern.ch              Phone: +41 22 7679248
> WWW:    http://root.cern.ch/~rdm/            Fax:   +41 22 7679480
>



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