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Hadoop >> mail # general >> Rejuvenate Hadoop 0.22 effort

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Re: Rejuvenate Hadoop 0.22 effort
Good news Roman!

About connecting with other projects.
HBase is compiling with 0.22.
For Pig there is
For Hive created

The direction with Hive and Pig is to create shim layers for different versions.

Don't know about the API delta between .22 and .23 yet. I assume it is
less than 0.20 vs 0.22. But I may be wrong.


On Fri, Sep 23, 2011 at 5:34 PM, Roman Shaposhnik <[EMAIL PROTECTED]> wrote:
> On Fri, Sep 16, 2011 at 2:21 AM, Konstantin Shvachko
> <[EMAIL PROTECTED]> wrote:
>> == TESTING =>> 5. I think Steve's idea of integrating 0.22 with Apache BigTop is
>> great. Will be glad to see any steps in this direction.
> The basic integration is done. We can produce fully functional RPM
> and DEB packages for Hadoop 0.22 release.
> This is good news. The bad news is that very few downstream components
> can be compiled against .22. And I'm not talking changes to versions, pom.xml
> and build.xml files. I'm talking API incompatibilities. Pig, Hive, HBase, Mahout
> all need to be modified to support .22. Before that's done -- there's
> little that
> can be done as far as stack validation is concerned.
> Given that work needs to be done in downstream components, I've got 2 questions:
>   1. do we know if the API delta between .22 and .23 is as
> significant as betwen
>   .22 and .20.2?
>   2. what's the common approach downstream to support multiple versions of
>   Hadoop APIs? Or is this even something that can be asked of all the
> components?
> Thanks,
> Roman.