While Pierre’s solution will probably be more helpful in the long run, this 
provides an easy way for me to examine the data by hand right now. I didn’t 
know that metric was on the Status History window, good to now!


From: Mark Payne []
Sent: Tuesday, November 07, 2017 9:26 PM
Subject: [EXT] Re: Metrics on Lineage Duration


In the UI you can right-click on a Processor and go to "View Status History" to 
see a chart of different metrics
over time. One of those metrics is the Average Lineage Duration (averaged over 
a 5-minute period).
Of course, you are asking for a reporting task/processor that does this. 
There's nothing that provides this info
directly, but you could always use InvokeHTTP, or something like that to poll 
the REST API, using the path
/nifi-api/flow/processors/<Processor ID>/status/history

Or, another approach that may be valuable would be to use the 
SiteToSiteProvenanceReportingTask to send
Provenance Events via Site-to-Site back to the NiFi instance. For a given 
Provenance Event, you can get Event Time
and Lineage Start Date, so to calculate the Lineage Duration / latency for the 
FlowFile, you can just use
EventTime - LineageStartDate. This approach would be a little different, as it 
provides lineage duration of each event.
So this could be used, for instance, to detect any particular FlowFiles that 
exceed some SLA or calculate a 90th percentile
type of thing, rather than getting an average.

Does this help at all?


On Nov 7, 2017, at 6:55 AM, Peter Wicks (pwicks) 
<<>> wrote:

Is there a reporting task/processor that will let me aggregate Lineage 
Duration’s for a point in time so I can monitor my flow using this metric?


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