Matt Burgess created NIFI-2126:
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Summary: 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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