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From "Enis Soztutar (JIRA)" <>
Subject [jira] Commented: (NUTCH-811) Develop an ORM framework
Date Mon, 26 Apr 2010 17:37:33 GMT


Enis Soztutar commented on NUTCH-811:

I have further developed the code, which was once part of NutchBase for handling object to
hbase mapping into a new project as per the above discussion. 
The project is named Gora, and it is hosted at GitHub. 

The project is hosted at

A short design document is at, and a quick start guide
is at

You can check out the code using
$ git clone git://

What it means for Nutch?
Gora started as a part of Dogacan's NutchBase implementation, but the goals for the project
are clearly different. However, Gora is primarily developed to handle Nutch's use cases. Specifically,
Gora will handle the HBase integration layer for nutchbase, and later a Hadoop Mapfile or
TFile based persistency will be developed. 

In the short term, we plan to use Gora's artifacts as a library in Nutch. Either me or Dogacan
will switch the current NutchBase branch to using Gora shortly. 

Gora is still in very early stages and needs your support. We would be more than happy if
the Nutch community could share comments, feedbacks, use cases and feature requests, or even
patches. I suppose we can use this issue or the mailing list for this task. 

> Develop an ORM framework 
> -------------------------
>                 Key: NUTCH-811
>                 URL:
>             Project: Nutch
>          Issue Type: New Feature
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 2.0
> By Nutch-808, it is clear that we need an ORM layer on top of the datastore, so that
different backends can be used to store data. 
> This issue will track the development of the ORM layer. Initially full support for HBase
is planned, with RDBM, Hadoop MapFile and Cassandra support scheduled for later. 

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