Data Analysis & Reporting Flashcards

An administrator wants to compare CPU usage across all VMs in a cluster over the past week. Which vRealize Operations feature is best suited for this task?

Answer: Heat Map

Heat Maps in vRealize Operations visually compare metric values across multiple objects simultaneously, making it ideal for cluster-wide CPU usage comparison.

What does the 'swapped' memory metric in vSphere indicate about a virtual machine?

Answer: The VM's memory has been written to the VMkernel swap file due to host memory pressure

Swapped memory indicates that the VMkernel has written the VM's memory pages to a .vswp swap file on disk because the host lacks sufficient physical RAM.

In vCenter Server, which rollup type for historical performance data calculates the mean of all samples collected during a rollup period?

Answer: Average

The Average rollup type computes the arithmetic mean of all collected samples within a rollup interval, smoothing out short-term spikes.

Which vRealize Operations report template is used to show VM rightsizing recommendations based on actual usage patterns?

Answer: VM Rightsizing Report

The VM Rightsizing Report in vRealize Operations identifies over-provisioned or under-provisioned VMs by comparing allocated resources to actual utilization.

A vSphere administrator observes that network 'dropped packets' metric is increasing for a VM. What is the most likely cause?

Answer: The network buffer is overwhelmed and packets are being discarded

Dropped packets occur when the NIC's receive or transmit buffers are overwhelmed and the system cannot process packets fast enough, causing discards.

Which vSphere alarm condition should an administrator configure to trigger when a datastore's free space drops below a specific threshold?

Answer: Datastore usage on disk metric

The 'Datastore usage on disk' metric tracks free space percentage and should be used to configure alarms for low datastore capacity conditions.

In vRealize Operations, what does 'Reclaimable Capacity' represent in a capacity analysis report?

Answer: Resources that can be recovered by rightsizing over-provisioned VMs

Reclaimable Capacity identifies resources currently allocated but not being used, which can be recovered by rightsizing over-provisioned virtual machines.