Best practices for VMware vSphere HA

  • 10 October 2014
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The following tables show the recommended configuration of VMware High Availability.

Admission Control


The below table shows the percentage values required for N+1 through N+4 availability for vSphere clusters of up to 32 (The Current maximum cluster size for vSphere 5.5).
The green highlighted values represent recommended values based on the level of availability.


In Summary the recommendations are:
  • Cluster of =N+1 redundancy
  • Cluster of >8 & =N+2 redundancy
  • Cluster of >16 & =N+3 redundancy
  • Cluster of >24 & =N+4 redundancy

Host Isolation Response and Advanced Settings


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