On Tue, 13 Feb 2007 12:27:07 -0700, Ralph H Castain <rhc_at_[hidden]> wrote:
> Oh, I should have made something clear - I believe those command line
> options aren't available in the 1.1 series. You'll have to upgrade to 1.2
> (available in beta at the moment).
>> Actually, that isn't the complete story. Open MPI will automatically
>> run in
>> several ways:
>> 1. one proc in each available slot on every node in your allocation:
>> don't include -np on your command line. You can rank them by slot
>> or leave out) or by node (--bynode).
>> 2. one proc on each node in your allocation: use --pernode on your
>> line. You can limit the number of nodes used by combining --pernode
>> with -np
>> <foo> - we will launch <foo> procs, one per node
>> 3. a specified number of procs on every node: use --npernode <n>.
>> Again, you
>> can limit the number of procs launched by combining it with -np and can
>> by slot or node
This is good to know; for some reason it seemed logical that the batch
scheduler should know how many processes per node, and TM should be able
to get the information. But that's making assumptions...