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Vsphere HA - Admission Control:

Vsphere HA - Admission Control:

Any Expert to explain the options of the Admission Control shown below:

for instance if we put 0 in : Host Failures Cluster tolerates
the meaning of the options in : Define host failover capacity by
Performance Degardation VM tolerates

Thank you

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

This is described here in very good detail

https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.avail.doc/GUID-53F6938C-96E5-4F67-9A6E-479F5A894571.html

https://geek-university.com/vmware-esxi/admission-control-explained/

jskfan

ASKER

checked those links.. just general concept

for instance if we put 0 in : Host Failures Cluster tolerates

there will be no reservation of resources for the hosts, they can provide up to 100 % of resources available

and if one ESX fails, then VMs that can be restarted on other ESX hosts they will be restarted and the ones that do not find enough Resources will not be restarted. ?

for other options:

Cluster Resources Percentage: this is clear
Slot Policy (Power on VMs) : this is NOT clear

Dedicated Failover Hosts : I believe they mean by putting ESX host as spare, it will not be used at all unless one of the ESX hosts in production fails

Performance Degradation VMs tolerate : is the degradation on the VM or on the ESX host ? I believe they mean degardation on the ESX Host

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Mr Tortu(r)e

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jskfan

ASKER

Thank you Guys...
I will come back to this topic when I re-use the LAB