How does vSphere High Availability calculate the memory slot size of a virtual machine?
A.
Virtual machine memory reservation + overhead of largest virtual machine
B.
Virtual machine memory reservation – overhead of largest virtual machine
C.
Virtual machine memory reservation + overhead of smallest virtual machine
D.
Virtual machine memory reservation – overhead of smallest virtual machine
Explanation:
Explanation/Reference:
A is correct.
Slot size is calculated using the largest reservations plus the memory overhead of any powered on virtual machines in the cluster.
https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.troubleshooting.doc/GUID-58841E8B-1FDF-4CEF-800A-1090DE42170D.html
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A slot is the minimum amount of CPU and memory resources required for a single VM in an ESXi cluster.
Slot size is an important concept because it affects admission control. A VMware ESXi cluster needs a way to determine how many resources need to be available in the event of a host failure. This slot calculation gives the cluster a way to reserve the right amount of resources.
vSphere HA calculates the memory component by obtaining the memory reservation, plus memory overhead, of each powered-on virtual machine and selecting the largest value. There is no default value for the memory reservation.
https://pubs.vmware.com/vsphere-60/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-60-availability-guide.pdf (page 23, 24)
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A
vSphere HA calculates the memory component by obtaining the memory reservation, plus memory overhead, of each powered-on virtual machine and selecting the largest value. There is no default value for the memory reservation.
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