MPI_Comm_connect(3)                Open MPI                MPI_Comm_connect(3)



NAME
       MPI_Comm_connect  - Establishes communication with a server.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Comm_connect(char *port_name, MPI_Info info, int root,
            MPI_Comm comm, MPI_Comm *newcomm)


Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_COMM_CONNECT(PORT_NAME, INFO, ROOT, COMM, NEWCOMM, IERROR)
            CHARACTER*(*)  PORT_NAME
            INTEGER        INFO, ROOT, COMM, NEWCOMM, IERROR


C++ Syntax
       #include <mpi.h>
       MPI::Intercomm MPI::Intracomm::Connect(const char* port_name,
            const MPI::Info& info, int root) const


INPUT PARAMETERS
       port_name Port name (string, used only on root).

       info      Options given by root for the connect (handle, used only on
                 root). No options currently supported.

       root      Rank in comm of root node (integer).

       comm      Intracommunicator over which call is collective (handle).


OUTPUT PARAMETERS
       newcomm   Intercommunicator with client as remote group (handle)

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPI_Comm_connect establishes communication with a server specified by
       port_name. It is collective over the calling communicator and returns
       an intercommunicator in which the remote group participated in an
       MPI_Comm_accept. The MPI_Comm_connect call must only be called after
       the MPI_Comm_accept call has been made by the MPI job acting as the
       server.

       If the named port does not exist (or has been closed), MPI_Comm_connect
       raises an error of class MPI_ERR_PORT.

       MPI provides no guarantee of fairness in servicing connection attempts.
       That is, connection attempts are not necessarily satisfied in the order
       in which they were initiated, and competition from other connection
       attempts may prevent a particular connection attempt from being
       satisfied.

       The port_name parameter is the address of the server. It must be the
       same as the name returned by MPI_Open_port on the server.



ERRORS
       Almost all MPI routines return an error value; C routines as the value
       of the function and Fortran routines in the last argument. C++
       functions do not return errors. If the default error handler is set to
       MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
       will be used to throw an MPI:Exception object.

       Before the error value is returned, the current MPI error handler is
       called. By default, this error handler aborts the MPI job, except for
       I/O function errors. The error handler may be changed with
       MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
       may be used to cause error values to be returned. Note that MPI does
       not guarantee that an MPI program can continue past an error.

       See the MPI man page for a full list of MPI error codes.


SEE ALSO
       MPI_Comm_accept MPI_Open_port




1.4.1                            Jan 14, 2010              MPI_Comm_connect(3)
