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From Rob Roland <...@simplymeasured.com>
Subject Re: Join Using MapReduce and Hbase
Date Thu, 24 Jan 2013 22:53:11 GMT
The O'Reilly book, "MapReduce Design Patterns" also covers joins. It's
pretty easy to follow and it gives some good examples. This doesn't cover
the HBase use case, but if you understand how to do a basic set of joins in
map/reduce, you can apply HBase to that model.


On Thu, Jan 24, 2013 at 5:35 AM, Doug Meil <doug.meil@explorysmedical.com>wrote:

>
> Hi there-
>
> Here is a comment in the RefGuide on joins in the HBase data model.
>
> http://hbase.apache.org/book.html#joins
>
> Short answer, you need to do it yourself (e.g., either with an in-memory
> hashmap or instantiating an HTable of the other table, depending on your
> situation).
>
> For other MR examples, see this...
>
> http://hbase.apache.org/book.html#mapreduce.example
>
>
>
>
> On 1/24/13 8:19 AM, "Vikas Jadhav" <vikascjadhav87@gmail.com> wrote:
>
> >Hi I am working join operation using MapReduce
> >So if anyone has useful information plz share it.
> >Example Code or New Technique along with existing one.
> >Thank You.
> >--
> >*
> >*
> >*
> >
> >Thanx and Regards*
> >* Vikas Jadhav*
>
>
>

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