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NIFI-2361 This closes #708. Update cluster information and add new graphic

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Rob Moran 2016-07-22 12:17:02 -04:00 committed by joewitt
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nifi-docs/src/main/asciidoc/administration-guide.adoc
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@ -488,8 +488,10 @@ Clustering Configuration
This section provides a quick overview of NiFi Clustering and instructions on how to set up a basic cluster. This section provides a quick overview of NiFi Clustering and instructions on how to set up a basic cluster.
In the future, we hope to provide supplemental documentation that covers the NiFi Cluster Architecture in depth. In the future, we hope to provide supplemental documentation that covers the NiFi Cluster Architecture in depth.
NiFi employs a Zero-Master Clustering paradigm. Each of the nodes in the cluster performs the same tasks on image::zero-master-cluster-http-access.png["NiFi Cluster HTTP Access"]
the data but each operates on a different set of data. One of the nodes is automatically elected (via Apache
NiFi employs a Zero-Master Clustering paradigm. Each node in the cluster performs the same tasks on
the data, but each operates on a different set of data. One of the nodes is automatically elected (via Apache
ZooKeeper) as the Cluster Coordinator. All nodes in the cluster will then send heartbeat/status information ZooKeeper) as the Cluster Coordinator. All nodes in the cluster will then send heartbeat/status information
to this node, and this node is responsible for disconnecting nodes that do not report any heartbeat status to this node, and this node is responsible for disconnecting nodes that do not report any heartbeat status
for some amount of time. Additionally, when a new node elects to join the cluster, the new node must first for some amount of time. Additionally, when a new node elects to join the cluster, the new node must first

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nifi-docs/src/main/asciidoc/overview.adoc
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@ -150,8 +150,7 @@ NiFi is also able to operate within a cluster.
image::zero-master-cluster.png["NiFi Cluster Architecture Diagram"] image::zero-master-cluster.png["NiFi Cluster Architecture Diagram"]
Starting with the NiFi 1.0 release, NiFi employs a Zero-Master Clustering paradigm. Each of the nodes in a NiFi cluster performs the same tasks on the data but each operates on a different set of data. Apache ZooKeeper elects one of the nodes as the Cluster Coordinator, and failover is handled automatically by ZooKeeper. All cluster nodes report heartbeat and status information to the Cluster Coordinator. The Cluster Coordinator is responsible for disconnecting and connecting nodes. As a DataFlow manager, you can interact with the NiFi cluster through the UI of any node in the cluster. Any change you make is replicated to all nodes in the cluster, allowing for multiple entry points to the cluster. Starting with the NiFi 1.0 release, a Zero-Master Clustering paradigm is employed. Each node in a NiFi cluster performs the same tasks on the data, but each operates on a different set of data. Apache ZooKeeper elects a single node as the Cluster Coordinator, and failover is handled automatically by ZooKeeper. All cluster nodes report heartbeat and status information to the Cluster Coordinator. The Cluster Coordinator is responsible for disconnecting and connecting nodes. Additionally, every cluster has one Primary Node, also elected by ZooKeeper. As a DataFlow manager, you can interact with the NiFi cluster through the user interface (UI) of any node. Any change you make is replicated to all nodes in the cluster, allowing for multiple entry points.
Performance Expectations and Characteristics of NiFi Performance Expectations and Characteristics of NiFi
---------------------------------------------------- ----------------------------------------------------
@ -295,4 +294,3 @@ References
- [[[bigdata]]] Wikipedia. Big Data [online]. Retrieved: 27 Dec 2014, from: http://en.wikipedia.org/wiki/Big_data - [[[bigdata]]] Wikipedia. Big Data [online]. Retrieved: 27 Dec 2014, from: http://en.wikipedia.org/wiki/Big_data
- [[[fbp]]] Wikipedia. Flow Based Programming [online]. Retrieved: 28 Dec 2014, from: http://en.wikipedia.org/wiki/Flow-based_programming#Concepts - [[[fbp]]] Wikipedia. Flow Based Programming [online]. Retrieved: 28 Dec 2014, from: http://en.wikipedia.org/wiki/Flow-based_programming#Concepts
- [[[seda]]] Matt Welsh. Harvard. SEDA: An Architecture for Highly Concurrent Server Applications [online]. Retrieved: 28 Dec 2014, from: http://www.eecs.harvard.edu/~mdw/proj/seda/ - [[[seda]]] Matt Welsh. Harvard. SEDA: An Architecture for Highly Concurrent Server Applications [online]. Retrieved: 28 Dec 2014, from: http://www.eecs.harvard.edu/~mdw/proj/seda/