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https://issues.apache.org/jira/browse/NIFI-1508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15151194#comment-15151194
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Randy Gelhausen commented on NIFI-1508:
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I still think a diagram in the site-to-site docs would be very helpful.

The specific context of the ask is in a discussion about the NiFi->Spark 
Streaming site2site integration, it wasn't clear that using a single nifi 
node's address would automatically cause a Spark Streaming job to connect to 
and pull data from the rest of the NiFi nodes in the cluster.

Should this JIRA be re-opened or do we need another JIRA?

> Site-to-Site documentation needs to better articulate the purpose and value
> ---------------------------------------------------------------------------
>
>                 Key: NIFI-1508
>                 URL: https://issues.apache.org/jira/browse/NIFI-1508
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Documentation & Website
>            Reporter: Joseph Witt
>            Priority: Minor
>             Fix For: 0.5.1
>
>
> https://nifi.apache.org/docs/nifi-docs/html/user-guide.html#site-to-site
> These docs are a good start.  But they would benefit from some images which 
> help users understand setup more and config pointers for admins who have to 
> set it up.  The admin guide refers to site-to-site but there is no 
> explanation of what it is.  Perhaps it deserves its own document - not sure.
> A related issue is that the first sentence about site-to-site mentions 
> instance to instance which can imply a node-to-node thing which obviously 
> doesn't sound very scalable.  Need to rewrite that to better articulate the 
> value proposition and inherent scalability and load balanced and auto-failed 
> over behavior of site-to-site.



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