Type = Character(99)

Default = n/a

This is an advanced MPI parameter. The MPIHOSTS parameter defines the host string argument for the mpiexec -hosts option. The string must begin with the number of hosts and be followed by the host names and (optionally) the number of processes to launch on each. If a value for the number of processes to launch on each node does not follow the host name, then the default value of 1 will be used. This parameter is not compatible with the MPICORES option as it is considered equivalent since it defines the launching of processes. For example, by defining MPIHOSTS='2 host1 4 host2 8' you are declaring that the program should be executed on two hosts, host1 and host2, and that host1 should launch 4 processes and host2 should launch 8 processes. Note that this parameter is limited to 99 characters in the control file; if the user requires more space to list the required hosts then they should instead create a machine file and list the desired host control in the MPIMACHF parameter instead. This parameter has no default value.