It sounds to me like you're talking about hadoop streaming (correct me if I'm wrong there). In that case, there's really no "order" to the lines being doled out as I understand it. Any given line could be handed to any given mapper task running on any given node.
I may be wrong, of course, someone closer to the project could give you the right answer in that case. -- Jim R. Wilson (jimbojw) On Thu, Jul 17, 2008 at 4:06 PM, Elia Mazzawi <[EMAIL PROTECTED]> wrote: > is there a way to have hadoop hand over the lines of a file backwards to my > mapper ? > > as in give the last line first. >