If you use the Java System Property java.io.tmpdir, your reducer will use the ./tmp directory in the local working directory allocated by the framework for your task.
If you have a specialty file system for transient data, such as a tmpfs, use that. On Sun, Mar 15, 2009 at 4:08 PM, Mark Kerzner <markkerz...@gmail.com> wrote: > Hi, > > what would be the best place to put temporary files for a reducer? I > believe > that since reducers each work on its own machine, at its own time, one can > do anything, but I would like a confirmation from the experts. > > Thanks, > Mark > -- Alpha Chapters of my book on Hadoop are available http://www.apress.com/book/view/9781430219422
