On Dec 13, 2011, at 9:10 PM, George Bosilca wrote: > I noticed today a drastic change in how ORTE deal with the hostfile between > trunk and 1.5. > > 1. 1.5 and prior used the hostile as a suggestion, a placeholder where to > pick the requested number of daemons during the launch. The current trunk > spawn daemons on all the nodes provided on the host file, and then spawn the > apps only on some of them.
It was in the RFC about the revised mapping system, George, and discussed multiple times on the telecons. I even raised this specific point at least twice on those telecons. > > 2. If a default hostfile is provided and --host was specified 1.5 and prior > use the nodes to limit the number of nodes in the environment to the > requested nodes. The current trunk seems to ignore the --host option if a > default hostfile is available. I'll check that one - we should limit the operation to the --host list. > > In my configuration the hostfile is system wide, specified in the /etc via > orte_default_hostfile. It contains all the nodes in the cluster, the users > are supposed to use --host to limit their mpirun to a specified subset. > > This seems a quite significant change. I would have expected an RFC. > > george. > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel
