I think it will be written to disk. There will be no difference in output format or flow with or without combiner.
On Mon, Sep 22, 2008 at 12:08 AM, Sandy <[EMAIL PROTECTED]> wrote: > Just a quick clarification: > > The combiner function acts as an optimization between the map and the > reduce > phases. Is the output of the combiner phase stored in memory before being > handed to reduce? Or is it written to disk and subsequently read from disk > by the reduce phase? > > > Thanks in advance, > > -SM >
