lamnodes - Resolve LAM node/CPU notation to Unix hostnames.
lamnodes [-chin] [where]
The lamnodes command is used to resolve LAM node/CPU nomenclature to Unix hostnames. It can be used to determine the current running configuration of the LAM/MPI run-time environment, and generate a boot schema that can be used to launch LAM in the future.
By default, lamnodes will print out the node number, default IP name, CPU count, and per-node flags for each node in the running LAM. gethostbyaddr(3) is used to obtain default hostnames. If gethostbyaddr(3) fails, the IP number is displayed instead.
This command can be used by setup shell scripts (and the like) to determine information from a currently-running LAM universe. For example, use lamnodes to resolve particular CPUs and/or nodes to specific unix hostnames. In a batch environment, lamnodes can be used to determine which CPUs share a common node (note that MPI_GET_PROCESSOR_NAME can be used for a similar effect in an MPI program).
lamnodes also shows per-node flags. Currently defined flags are:
|July, 2007||LAM 7.1.4|