An architect is designing a VMware software-defined data center (SDDC) solution based on the following...

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Analyzing the Current State

Use monitoring tools to do an inventory of the existing infrastructure and report the resource usage.

For each system, capture peak and average utilization for the following items:

• CPU

• RAM

• IOPS

• Network utilization

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Calculating the Total CPU and Memory Requirements

Multiply the adjusted total number of VMs by the average resource usage per server by using the CPU and RAM usage data from the capacity analysis report at peak utilization times.

When sizing hosts, use peak utilization levels rather than average utilization. In this way, all systems can run at their observed peak resource levels simultaneously.

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Calculating Datastore Size

Average size of all VMDKs for a VM:

— Number of VMs x Average size of VM’s VMDK files = VM capacity

Sizing for average utilization always introduces the risk of workloads peaking at the same time. During peak utilization, the environment might be constrained for resources.