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IMPORTANT NOTE: when sendout ompi_output() strings to files, note that the file goes into the session directory. If the session directory does not exist yet when you call ompi_output() and you are sending the string to a file, THE STRING WILL BE DROPPED (in terms of the file -- it will still be sent to all other locations that were specified). This should really only be a factor for a fairly small portion of things during initialization of a process -- basically, until the session directory exists, nothing will be written to a file. ompi_output() will automatically take care of creating the file and writing to it once the session directory has been created. So it is valid to: id = ompi_output(...something with file set...) ompi_output(id, "blah!"); /* ... process session directory is created ... */ ompi_output(id, "wazzlebort!"); In this case, the output file will be: ----- [WARNING: 1 lines lost because the Open MPI process session directory did not exist when ompi_output() was invoked] wazzlebort! ----- This commit was SVN r2637.
This is the world's greatest MPI. ...more to write here should be a short file, referring to the real docs.