On Tue, 27 Mar 2007, Frank Preiswerk wrote: > I am slightly confused by the way the standard output is redirected in a R > snow cluster environment. > I am using parLapply from the snow package to execute a function on my > MPI/LAM cluster. How can I redirect standard output (produced using "cat") > from this function back to the terminal where I invoked it? I intend to > transmit some status information in advance to the final result of the > function. I investigated the chain of functions called by parLapply and it > seems that snow is designed to just retrieve the final result of the > computation.
The R level only deals with final values. There is currently no means within snow to communicate status information back to the master. By default output is redirected to /dev/null. You can provide an alternate destination with the outfile option and monitor those files from another process. Best, luke > > Thanks in advance for any hints, > Frank Preiswerk > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Luke Tierney Chair, Statistics and Actuarial Science Ralph E. Wareham Professor of Mathematical Sciences University of Iowa Phone: 319-335-3386 Department of Statistics and Fax: 319-335-3017 Actuarial Science 241 Schaeffer Hall email: [EMAIL PROTECTED] Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
