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Chapter 1. Scaling a Pacemaker Cluster

Table of Contents

1.1. Overview
1.2. Terms
1.3. Guest Nodes
1.4. Remote Nodes
1.5. Expanding the Cluster Stack

1.1. Overview

In a basic Pacemaker high-availability cluster,[3] each node runs the full cluster stack of corosync and all Pacemaker components. This allows great flexibility but limits scalability to around 16 nodes.
To allow for scalability to dozens or even hundreds of nodes, Pacemaker allows nodes not running the full cluster stack to integrate into the cluster and have the cluster manage their resources as if they were a cluster node.


[3] See the Pacemaker documentation, especially Clusters From Scratch and Pacemaker Explained, for basic information about high-availability using Pacemaker