You're reading from Data Engineering with Python

Product typeBook

Published inOct 2020

Reading LevelBeginner

PublisherPackt

ISBN-139781839214189

Edition1st Edition

Languages

Python

Concepts

Data Analysis

Author (1)

Paul Crickard

The basics of NiFi clustering

Clustering in Apache NiFi follows a Zero-Master Clustering architecture. In this type of clustering, there is no pre-defined master. Every node can perform the same tasks, and the data is split between them. NiFi uses Zookeeper when deployed as a cluster.

Zookeeper will elect a Cluster Coordinator. The Cluster Coordinator is responsible for deciding whether new nodes can join – the nodes will connect to the coordinator – and to provide the updated flows to the new nodes.

While it sounds like the Cluster Coordinator is the master, it is not. You can make changes to the data pipelines on any node and they will be replicated to all the other nodes, meaning a non-Cluster Coordinator or a non-Primary Node can submit changes.

The Primary Node is also elected by Zookeeper. On the Primary Node, you can run isolated processes. An isolated process is a NiFi processor that runs only on the Primary Node. This is important because think what...

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Data Engineering with Python

Published in: Oct 2020Publisher: PacktISBN-13: 9781839214189

Author (1)

Paul Crickard

Paul Crickard authored a book on the Leaflet JavaScript module. He has been programming for over 15 years and has focused on GIS and geospatial programming for 7 years. He spent 3 years working as a planner at an architecture firm, where he combined GIS with Building Information Modeling (BIM) and CAD. Currently, he is the CIO at the 2nd Judicial District Attorney's Office in New Mexico.
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The basics of NiFi clustering

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