An IT infrastructure consultant is provisioning a dedicated Type 1 hypervisor host to supp… — CompTIA A+ (Core 1 & Core 2)

An IT infrastructure consultant is provisioning a dedicated Type 1 hypervisor host to support two distinct workload pools: four database guest virtual machines (VMs) requiring $12\text{ GB}$ of RAM each, and two application guest VMs requiring $6\text{ GB}$ of RAM each. Company SLA policy strictly prohibits RAM overcommitment. The hypervisor management console mandates a fixed host system memory reservation of $4\text{ GB}$ , plus an additional dynamic hypervisor overhead allocation calculated as $10\%$ of total guest RAM to accommodate VM paging files and virtualization tables. What is the minimum amount of physical RAM that must be installed in the host server to satisfy all operational constraints?

A
$60\text{ GB}$
B
$64\text{ GB}$
$70\text{ GB}$ Cevap
D
$74\text{ GB}$

Cevap

The minimum amount of physical RAM required on the host server is

70\text{ GB}

To calculate total host RAM requirements without overcommitment, sum the total guest memory allocation (

4 \times 12\text{ GB} + 2 \times 6\text{ GB} = 60\text{ GB}

), the fixed hypervisor reservation (

4\text{ GB}

), and the dynamic hypervisor overhead (

10\%

60\text{ GB} = 6\text{ GB}

). This yields

60\text{ GB} + 4\text{ GB} + 6\text{ GB} = 70\text{ GB}

Adım Adım Çözüm

Calculate the total RAM required by all guest virtual machines.

Database VMs:

4 \times 12\text{ GB} = 48\text{ GB}

. Application VMs:

2 \times 6\text{ GB} = 12\text{ GB}

. Total Guest RAM =

48\text{ GB} + 12\text{ GB} = 60\text{ GB}

SLA policy prohibits RAM overcommitment, requiring a 1:1 physical allocation for guest VMs.

Calculate the dynamic hypervisor overhead allocation.

Overhead =

10\%

of Total Guest RAM =

0.10 \times 60\text{ GB} = 6\text{ GB}

Hypervisors require extra memory headroom for virtual machine page tables, framebuffers, and state tracking.

Sum total guest RAM, fixed hypervisor host memory reservation, and dynamic overhead.

Total Minimum Host RAM =

60\text{ GB (Guest)} + 4\text{ GB (Host Reservation)} + 6\text{ GB (Overhead)} = 70\text{ GB}

The physical host host server must satisfy the sum of all VM allocations plus host kernel and operational reserves.

Anahtar Kavram

Hypervisor host capacity planning and RAM overhead accounting

Tahmini Süre:2m 0s

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