Hosts Information

Description

lamhosts finds the host name associated with its node number. Can be used by mpi.spawn.Rslaves to spawn R slaves on selected hosts. This is a LAM-MPI specific function.

mpi.is.master checks if it is running on master or slaves.

mpi.hostinfo finds an individual host information including rank and size in a comm.

slave.hostinfo is executed only by master and find all master and slaves host information in a comm.

Usage

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lamhosts()
mpi.is.master()
mpi.hostinfo(comm = 1)
slave.hostinfo(comm = 1, short=TRUE) 

Arguments

comm

a communicator number

short

if true, a short form is printed

Value

lamhosts returns CPUs nodes numbers with their host names.

mpi.is.master returns TRUE if it is on master and FALSE otherwise.

mpi.hostinfo sends to stdio a host name, rank, size and comm.

slave.hostname sends to stdio a list of host, rank, size, and comm information for all master and slaves. With short=TRUE and 8 slaves or more, the first 3 and last 2 slaves are shown.

Author(s)

Hao Yu

See Also

mpi.spawn.Rslaves

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