Brandon DeVries created NIFI-1675:
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Summary: DistributeLoad: add overflow relationship
Key: NIFI-1675
URL: https://issues.apache.org/jira/browse/NIFI-1675
Project: Apache NiFi
Issue Type: Improvement
Reporter: Brandon DeVries
Priority: Minor
We've had cases where a user would like to have backpressure on a relationship,
and if that threshold is reached then divert new incoming FlowFiles down an
alternate (perhaps less computationally intensive) path. In thinking about how
to do this, DistributeLoad seems like a possibility. We could potentially
allow the addition of a (probably single) relationship with a weight of "0",
that is never used unless the strategy is "next available", and all other
relationships are unavailable. This would be the "overflow" relationship,
providing the desired behavior. This is somewhat related to the "Interactive
Queue Management"[1] that is progressing, but comes from a slightly different
direction. If anyone has any additional thoughts, pros / cons, etc... please
feel free to chime in.
\[1\]
https://cwiki.apache.org/confluence/display/NIFI/Interactive+Queue+Management
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