Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
Hadoop >> mail # user >> input file order


Copy link to this message
-
Re: input file order
Hi,
 Mappers run in parallel. So without reducer it is not possible ensure the
sequence.

On Fri, Jan 20, 2012 at 2:32 AM, Mapred Learn <[EMAIL PROTECTED]>wrote:

> This is my question too.
> What if I want output to be in same order as input without using reducers.
>
> Thanks,
> JJ
>
> Sent from my iPhone
>
> On Jan 19, 2012, at 12:19 PM, Ronald Petty <[EMAIL PROTECTED]> wrote:
>
> > Daniel,
> >
> > Can you provide a concrete example of what you mean by "output to be in
> an
> > orderly manner"?
> >
> > Also, what are the file sizes and types?
> >
> > Ron
> >
> > On Thu, Jan 19, 2012 at 11:19 AM, Daniel Yehdego
> > <[EMAIL PROTECTED]>wrote:
> >
> >>
> >> Hi,
> >> I have 100 .txt input files and I want my mapper output to be in an
> >> orderly manner. I am not using any reducer.Any idea?
> >>
> >> Regards,
> >>
> >>
> >>
>

--
https://github.com/zinnia-phatak-dev/Nectar