Hi,
We are planning to configure shares or reservation for specific virtual machine.
Related to the bibliografy of Duccan Epi Vmware Sphere 5, it is possilble to assign shares or memory reservation.
Assigning reservations might cause unexpected behaviour when the virtual machine is power on or perhaps with vmotion.
lMy question with resources Allocation is:
- When vmotion moves vm to other node (case of hardware failure), HA acontention policies could prevent virtual machine with reservation to move to other host when there is not enough resources (reservation is configured at virtual machine level). Imagine we have a cluster with only one virtual machine with 28 gb reservation. Rest of virtual machine on that cluster have not reservations. if the virtual machine is moved the last one, taking in account has reservations, would it have prefernce and allowed to move to?
Imagine the scenario
ESX1 - 16 GB RAM - 4 CPU X 2 CPS = 8 VCPU
ESX2 - 16 GB RAM - 4 CPU X 2 CPS = 8 VCPU
ESX1:
Vm1 - 2 gb RAM x 1 vCPU (default resources allocation)
ESX2:
Vm2 - 4 gb RAM x 2 vCPU (default resources allocation)
Vm3 - 4 gb RAM x 2 vCPU (default resources allocation)
Vm4 - 8 gb RAM x 4 vCPU - RAM Reservation : 8 GB (virtua machine level)
no resources pools configured
Case of hardware failure of hardware. when vmotion operates:
- Given, vm4 has 8 gb reservation. would it be possible (HA admission control policies) to move virtual machines on ESX2 to ESX1 ?
8+4+4 (esx2 before moving) + 2(ESX1) = 18 GB > 16 GB. It is supposed there will be contention but would vm4 be able to move?
