Best practices for VMware vSphere HA | Nutanix Community
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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

What about the rest of the settings?   And this post is from a VMware guru… not good….  who QAs this guy?  

That information provided by the OP are the non-default settings.  If the setting is not listed, then you can leave it as default or set it to your customer preference.

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