For anyone truly interested, the revised hostfile behavior to be supported beginning with release 1.3 is described on the Open MPI wiki:
https://svn.open-mpi.org/trac/ompi/wiki/HostFilePlan Many thanks to the folks from Sun for providing that summary! Ralph On 12/19/07 3:17 PM, "Ralph H Castain" <r...@lanl.gov> wrote: > It is fully implemented, but on my development branch at the moment. We hope > to bring that over to the trunk late Jan - primarily need to complete some > work on MPI-2 dynamic process management and give Josh a chance to repair > the checkpoint/restart functionality before we bring it over. > > Ralph > > > > On 12/19/07 3:07 PM, "Adams, Brian M" <bria...@sandia.gov> wrote: > >> Ralph, >> >> Thanks for the clarification as I'm dealing with workarounds for this at >> Sandia as well... >> >> I might have missed this earlier in the dialog, but is this capability >> in the SVN trunk right now, or still on the TODO list? >> >> Brian >> ---------------------------------------- >> Brian M. Adams, PhD (bria...@sandia.gov) >> Optimization and Uncertainty Estimation >> Sandia National Laboratories >> P.O. Box 5800, Mail Stop 1318 >> Albuquerque, NM 87185-1318 >> Voice: 505-284-8845, FAX: 505-284-2518 >> >>> -----Original Message----- >>> From: users-boun...@open-mpi.org >>> [mailto:users-boun...@open-mpi.org] On Behalf Of Ralph H Castain >>> Sent: Wednesday, December 19, 2007 2:35 PM >>> To: Open MPI Users <us...@open-mpi.org>; pat.o'bry...@exxonmobil.com >>> Cc: Castain, Ralph H. (LANL) >>> Subject: Re: [OMPI users] Torque and OpenMPI 1.2 >>> >>> >>> Open MPI 1.3 will support use of the hostfile and the tm >>> launcher simultaneously. It will work slightly differently, >>> though, with respect to the hostfile: >>> >>> 1. PBS_NODEFILE will be read to obtain a complete list of >>> what has been allocated to us >>> >>> 2. you will be allowed to provide a hostfile for each >>> app_context as a separate entry to define the hosts to be >>> used for that specific app_context. >>> The hosts in your hostfile, however, must be included in the >>> PBS_NODEFILE. >>> >>> Basically, the hostfile argument will serve as a filter to >>> the hosts provided via PBS_NODEFILE. We will use the TM >>> launcher (unless, of course, you tell us to do otherwise), so >>> the issues I mentioned before will go away. >>> >>> There will be a FAQ entry describing the revised hostfile >>> behavior in some detail. We think the change will help >>> rationalize the behavior so it is more consistent across all >>> the different use-cases people have invented. ;-) >>> >>> Hope that helps >>> Ralph >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >> > >
