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https://issues.apache.org/jira/browse/NIFI-2126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15371493#comment-15371493
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ASF GitHub Bot commented on NIFI-2126:
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Github user mattyb149 closed the pull request at:
https://github.com/apache/nifi/pull/613
> Add processors to enable distributed fetching of database tables
> ----------------------------------------------------------------
>
> Key: NIFI-2126
> URL: https://issues.apache.org/jira/browse/NIFI-2126
> Project: Apache NiFi
> Issue Type: New Feature
> Reporter: Matt Burgess
> Assignee: Matt Burgess
> Fix For: 1.0.0
>
>
> To enable NiFi to migrate/move data from RDBMS source tables to other target
> systems (other RDMBS, HDFS, etc.), one approach is to be able to distribute
> the fetching of large tables across various tasks/nodes, rather than a single
> ExecuteSQL processor (which for large tables can run out of memory and get
> slow).
> The idea would be to generate flow files containing SQL statements that would
> fetch a portion (or "page") of a table. These flow files can be distributed
> in NiFi to many ExecuteSQL processors, each of which would grab a page and
> emit the results. The flow(s) can then continue in parallel/distributed
> fashion until the data is in the target location(s).
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