[jira] [Updated] (NIFI-2126) Add processors to enable distributed fetching of database tables

["Matt Burgess (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-2126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Burgess updated NIFI-2126:
-------------------------------
    Status: Patch Available  (was: In Progress)

> 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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