08-06-2016
Jim,
Thanks so much. I understand that the question was a bit vague, but it was because of too much information about relevant and related technologies going around.
I could not ask clearly that I need to start with a simple cluster and then try out some of these sophisticated tools.
I will make use of the chart and the link about the MPICH cluster.
I can try it alright, but there is a potential problem in near future that I can foresee. I have an application to run with OpenMPI. So if I install a MPICH cluster, can I then Install OpenMPI and run the MPI application with it instead of MPICH implementation??
thanks again!!
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LEARN ABOUT DEBIAN
mpi_group_union
MPI_Group_union(3) MPI MPI_Group_union(3)
NAME
MPI_Group_union - Produces a group by combining two groups
SYNOPSIS
int MPI_Group_union(MPI_Group group1, MPI_Group group2, MPI_Group *newgroup)
INPUT PARAMETERS
group1 - first group (handle)
group2 - second group (handle)
OUTPUT PARAMETER
newgroup
- union group (handle)
THREAD AND INTERRUPT SAFETY
This routine is thread-safe. This means that this routine may be safely used by multiple threads without the need for any user-provided
thread locks. However, the routine is not interrupt safe. Typically, this is due to the use of memory allocation routines such as malloc
or other non-MPICH runtime routines that are themselves not interrupt-safe.
NOTES FOR FORTRAN
All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list. ierr
is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked
with the call statement.
All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.
ERRORS
All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in
the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI
job. The error handler may be changed with MPI_Comm_set_errhandler (for communicators), MPI_File_set_errhandler (for files), and
MPI_Win_set_errhandler (for RMA windows). The MPI-1 routine MPI_Errhandler_set may be used but its use is deprecated. The predefined
error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can
continue past an error; however, MPI implementations will attempt to continue whenever possible.
MPI_SUCCESS
- No error; MPI routine completed successfully.
MPI_ERR_GROUP
- Null or invalid group passed to function.
MPI_ERR_INTERN
- This error is returned when some part of the MPICH implementation is unable to acquire memory.
SEE ALSO
MPI_Group_free
LOCATION
group_union.c
11/6/2010 MPI_Group_union(3)