You are designing a VMware virtualization solution for a customer. When planning the VM
over subscription ratio, which attribute that can most affect the VM ware licensing
requirement should you take into consideration?
A.
networking requirement per VM
B.
processor requirement per VM
C.
memory requirement per VM
D.
I/O per VM
Can anyone explain why the answer is D?
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Let’s say you want a 30:1 consolidation ratio. For starters, you’ll likely need a pretty large server (probably 4U) to handle the VM’s I/O requirements. Since several applications today license based on physical server resources, your application licensing costs may increase. In addition, a major hardware failure on a server would result in the need to failover more than 30 VMs to the remaining hosts in the VM physical host cluster.
http://searchservervirtualization.techtarget.com/feature/Eliminate-I-O-bottlenecks-improve-VM-performance
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It’s not.
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From the official study guide, “the cost of VM licenses can increase significantly with very large memory configurations.”
I think it is because more hosts will need to be added in order to account for the need.
So, answer could be C (memory requirement per VM).
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D is correct answer
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B is the correct answer. VMware issues ESXi and vSphere licenses on per CPU core basis. So, the more CPU cores required, the more licenses are needed.
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My answer is B
All VMware’s enterprise vSphere editions are licensed per processor, where a processor can have either up to six or up to12 cores, depending on the edition. VMware places no restrictions on the number and kind of virtual machines (VMs) that can be hosted on a server, but it does require the purchase of at least one year of SnS per license.
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C. The cost of vmware license can increase significantly with very large memory consideration.
From the study guide
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The problem with this question is that not many folks typically use vRAM VMWare licensing (this has to be circa v5.0 2010-2011), and the question doesn’t state that this is the licensing model being used. If you are using vRAM licensing, then memory requirements per virtual machine will drastically affect licensing. If you’re using CPU licensing (all modern versions post 2011, v5 and v6), then the memory amount doesn’t matter at all.
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processor requirement per VM
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