Hi,
In addition to Ralph's explanation, you can change the policy of
this behavior using MCA param orte_set_default_slots.
For example, by setting "none" you can disable the auto detection
of slots count, which means it's compatible with openmpi-1.6.X.
Regards,
Tetsuya Mishima
There is no problem with using numerical host names - we don’t care so long as
your system can resolve them. The difference you are seeing relates to a change
in behavior created during the 1.7 series. If you don’t specify the #slots on a
host, then we automatically set it to the number of detec
