Hi , I just tried the openmpi 1.8, but I found the feature --mca rmaps seq doesn't work.
for example, >mpirun -np 4 -hostfile hostsfle --mca rmaps seq hostname It shows below error, -------------------------------------------------------------------------- Your job failed to map. Either no mapper was available, or none of the available mappers was able to perform the requested mapping operation. This can happen if you request a map type (e.g., loadbalance) and the corresponding mapper was not built. -------------------------------------------------------------------------- but when I use ompi_info ,it shows has this feature >ompi_info |grep -i rmaps MCA rmaps: lama (MCA v2.0, API v2.0, Component v1.8) MCA rmaps: mindist (MCA v2.0, API v2.0, Component v1.8) MCA rmaps: ppr (MCA v2.0, API v2.0, Component v1.8) MCA rmaps: rank_file (MCA v2.0, API v2.0, Component v1.8) MCA rmaps: resilient (MCA v2.0, API v2.0, Component v1.8) MCA rmaps: round_robin (MCA v2.0, API v2.0, Component v1.8) * MCA rmaps: seq (MCA v2.0, API v2.0, Component v1.8)* MCA rmaps: staged (MCA v2.0, API v2.0, Component v1.8) Any suggestions? Many thanks, Bill