[jira] Commented: (NUTCH-808) Evaluate ORM Frameworks which support non-relational column-oriented datastores and RDBMs

["Enis Soztutar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NUTCH-808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852840#action_12852840 ] 

Enis Soztutar commented on NUTCH-808:
-------------------------------------

A candidate framework is DataNucleus. It has the following benefits. 

- Apache 2 license. 
- JDO support 
- HBase, RDBMS, XML persistance. 

I will further investigate whether we can integrate Hadoop writables/Avro serialization so that objects can be passed from Mapred. 


> Evaluate ORM Frameworks which support non-relational column-oriented datastores and RDBMs 
> ------------------------------------------------------------------------------------------
>
>                 Key: NUTCH-808
>                 URL: https://issues.apache.org/jira/browse/NUTCH-808
>             Project: Nutch
>          Issue Type: Task
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>
> We have an ORM layer in the NutchBase branch, which uses Avro Specific Compiler to compile class definitions given in JSON. Before moving on with this, we might benefit from evaluating other frameworks, whether they suit our needs. 
> We want at least the following capabilities:
> - Using POJOs 
> - Able to persist objects to at least HBase, Cassandra, and RDBMs 
> - Able to efficiently serialize objects as task outputs from Hadoop jobs
> - Allow native queries, along with standard queries 
> Any comments, suggestions for other frameworks are welcome.

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