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From Andrew Grande <>
Subject Re: Polling Processors impact on Latency
Date Tue, 07 Nov 2017 11:44:16 GMT
Yes, polling increases latency in some cases. But no, NiFi is not just
polling. It has all kinds of sources, and listening vs polling vs
subscribing purely depends on the protocol of that given processor.

Hope this helps,

On Tue, Nov 7, 2017, 1:39 AM Chirag Dewan <> wrote:

> Hi All,
> I am a layman to NiFi. I am exploring NiFi as a data flow engine to be
> integrated with my Flink processing engine. A brief history of our approach
> :
> We are trying to build a Streaming Data processing engine. We started off
> with Flink as the sole core engine, which is responsible for
> collection(through Flink Sources) as well as processing the data.
> Soon we fumbled onto NiFi and the data flow world.
> So far, my understanding is that the NiFi processors are poling processors
> and not Pub-Sub processors. That makes me wonder, whats the impact of
> polling on latency? I know I can configure my processors to tradeoff
> latency with throughput, but is there a hard set limit on the latency I can
> achieve using NiFi?
> As I said, I am layman as yet. Perhaps my understanding is short here. Any
> leads would be much appreciated.
> P.S - Not diving much into Event Driven Processors. They look like
> something which might clear my thoughts. But since they are marked
> experimental, would be more interested in understanding the timer driven
> processors.
> Thanks,
> Chirag

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