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https://issues.apache.org/jira/browse/CRUNCH-92?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13475795#comment-13475795
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Matthias Friedrich commented on CRUNCH-92:
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To be honest, I've never accessed a relational database from Hadoop. I've
always exported the data first to make my Hadoop jobs reproducible and to
prevent DDoS on the database (which isn't a problem with the suggested
implementation). But I understand that this could be useful to others.
Should we perhaps move this DataBaseSource to crunch-contrib? It is not
generally applicable because for most Crunch jobs it will be the bottleneck and
I'm reluctant to add features to crunch-core that don't scale (and can't be
made scalable). At least we have to mention the limitations in the Javadocs.
> It should be possble to read data from DataBase
> -----------------------------------------------
>
> Key: CRUNCH-92
> URL: https://issues.apache.org/jira/browse/CRUNCH-92
> Project: Crunch
> Issue Type: New Feature
> Reporter: Rahul Sharma
> Attachments: 0001-CRUNCH-92-Database-Source-in-crunch.patch,
> CRUNCH-92.patch
>
>
> At times we need to read some data from RDBMS in a MR job, so crunch should
> have a Source for the same.
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