FWIW, Josh implemented "MCA-NULL" in https://svn.open-mpi.org/trac/ompi/changeset/18364
.
I'm not sure how I feel about this solution. On the one hand, it's
kind of a hack-ish way of solving the immediate issue. On the other
hand, it's really a larger issue of explicitly *not* setting an M
The problem: The orted open all plm before discarding most of them,
all this in the context where a "--mca plm rsh" was present on the
mpirun invocation.
The non problem: In the context of the mpirun process, only the rsh
plm is opened, as the mpirun is the only process who get the "--mca
We could also call it 'null' for the empty set of components? Or maybe
OMPI-NULL.
Outside of the naming do others this this is a useful feature to
implement?
-- Josh
On May 2, 2008, at 10:51 AM, Ralph Castain wrote:
I would think that adding a special keyword would be the correct
method
I would think that adding a special keyword would be the correct method. I
would suggest something with an "ompi" in it, perhaps capitalized so there
is no confusion...something like "OMPI-NONE"?
On 5/2/08 8:37 AM, "Josh Hursey" wrote:
> I don't believe we have the logic in place to tell mca_co
I don't believe we have the logic in place to tell mca_component_open
'do not open anything'. (I could be wrong though).
Adding such an option might be useful, but we would have to consider
how that option should be specified by the user. Currently if you do
not set a value (leave empty spa
I see what the problem is. In the case of slurm, I don't want -any-
components to be opened, even though I am going to call plm open/select. I
have to leave that logic in place for those environments that -do- want to
specify some backend secondary launcher.
So the question is: how do I tell mca_c
Well, I have a current version of the trunk. I add an MCA param to the
environment indicating that only rsh is to be used by the orted. Yet I get
an output from every orted indicating that slurm (misspelled!) is available
for selection.
This tells me that the slurm component is being opened, even
(moving to devel list for wider audience)
Hmm. I thought the UTK stuff from a while ago supposedly changed this
behavior to only open the components that were specifically requested.
This behavior looks like the *original* MCA behavior -- open them all,
then discard what we don't want (but
