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Question 82 - AZ-104 discussion

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HOTSPOT

You create a virtual machine scale set named Scale1. Scale1 is configured as shown in the following exhibit.

Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.


Question 82
Correct answer: Question 82

Explanation:

As cooling period and scale in and scale out durations are not displayed in the graphical view, so we need to consider the default values as below for these settings.

Cool down (minutes) : The amount of time to wait before the rule is applied again so that the autoscale actions have time to take effect. Default is 5 minutes.

Duration : The amount of time monitored before the metric and threshold values are compared.

Default is 10 minutes.

Box 1: 4 virtual machines

The Autoscale scale out rule increases the number of VMs by 2 if the CPU threshold is 80% or higher for more than or equals to 10 mins due to default duration for scale in and out is 10 minutes. Since

CPU utilization at 85% only lasts for 6 mins , it does not trigger the rules.

Hence no of virtual machines will be same as the initial value which is 4.

Box 2: 4 virtual machines

The Autoscale scale in rule decreases the number of VMs by 4 if the CPU threshold is 30% or lower for more than or equal to 10 mins. due to default duration for scale in and out is 10 minutes . Since

CPU utilization at 30% only lasts for 6 mins , it does not trigger the rules. Hence after first 6 mins instance count will be same as initial count as 4. After that CPU utilization reached to 50% for 6 mins , which again would not trigger the scale in rule. Therefore no of virtual machines will be same as the initial value which is 4.

Reference:

https://docs.microsoft.com/en-us/azure/azure-monitor/platform/autoscale-overview

https://docs.microsoft.com/en-us/azure/azure-monitor/platform/autoscale-best-practices

https://docs.microsoft.com/en-us/azure/azure-monitor/platform/autoscale-common-scale-patterns

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asked 26/09/2024
Carol Phelps
35 questions
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