Dmitriy ,

Thank you for your help.


On Thu, Jul 9, 2009 at 9:34 AM, Dmitriy Ryaboy <dvrya...@cloudera.com>wrote:

> Jeff,
> Chris Olston answered this a while back:
>
> http://markmail.org/thread/xnwutstlftnyycxs
>
> (by the way, MarkMail is awesome for searching mailing list archives.
> Highly
> recommended.)
>
> There are some changes that have to do with sampling and multi-store, but
> that email will give you the general idea.
>
> Also, remember you can always get the MR plan by running "describe" on a
> relation.
>
> Hope this helps
> -Dmitriy
>
>
> On Wed, Jul 8, 2009 at 6:24 PM, zhang jianfeng <zjf...@gmail.com> wrote:
>
> > Hi all,
> >
> >
> > I found that the following script will be converted into 3 mapreduce
> jobs:
> >
> > A = *LOAD* '/user/zjffdu/input.txt' *USING* PigStorage();
> >
> > B = *GROUP* A *BY* $0;
> >
> > B = *FOREACH* B *GENERATE* *group*,COUNT($1);
> >
> > B = *ORDER* B *BY* $1;
> >
> > *DUMP* B;
> >
> > I am very interested to know How Pig compile the script to jobs, reading
> > the
> > source code is a way, but If there’s any document, that would be better.
> > Does anyone know where can I find the related documents ? Or is there any
> > JIRA item related to this ?
> >
> > Thank you in advance.
> >
> >
> >
> > Jeff Zhang.
> >
>

Reply via email to