What is the maximum size of nodes?

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Failover
Failover Clustering
The following is the definition of from Wikipedia for “high-availability cluster” High-availability clusters (also known as Failover Clusters) are implemented primarily for the purpose of improving the availability of services that the cluster provides. They operate by having redundant nodes, which are then used to provide service when system components fail. The most common size for an HA cluster is two nodes, which is the minimum requirement to provide redundancy. HA cluster implementations attempt to use redundancy of cluster components to eliminate single points of failure.

My question: This definition defines the common size of a cluster as two nodes, is there a maximum

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The maximum cluster size depends on the application and operating system. More nodes usually always provides better performance and availability. But there are a few limitations out there; VMware, for instance, has a maximum ESX HA cluster of 32 nodes. Mostly I’ve only heard of recommended maximums, that are either 8, 16, or 32.

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