Exam AZ-304 topic 4 question 6 discussion

Answers seem to be correct. Box 1: 20 Minutes Box 2: 9

The first one is 10 minutes!

Scales to 9 from Default-6 or scales to 9 from minimum-3? The question doesn't say the VM count dropped from default to minimum. If scaling from default-6, then .... BOX 1: 10 Minutes BOX 2: 9

Box 1: 10 Minutes Box 2: 9

Correct answer

Box 1: 20 minutes* Box 2: 9 * Duration The amount of time monitored before the metric and threshold values are compared. Does not include cool down period. https://docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-autoscale-portal

10Min / 9 VMs

"if SS1 scales to nine VM" - it does not even say scales from how many instances... assume the set is running on the default 6 instance and has been stable, and all of a sudden the load increases and you need 9 VMs, how fast will the Sacle Set to complete this change? Obviously, you only need to wait for 10 mins since the sudden increase of load.

For Box1, the minimum should be 10 minutes. The actual time is depended on when the last scale action is taken place. If it just scaled out (increased from 6 cpu to 9 cpu), then it will need 10+10 =20 minutes to scale out again (assuming the cpu % is greater than 75 throughout this period). The question is asking for the minimum time to scale out again and we could assume that the last scaled out happened more than 10 minutes ago, as the question did not specify when the last scale action took place.

On exam 24.12.2021

"Duration - The amount of time monitored before the metric and threshold values are compared. *Does not include cool down period.*" So, 20 mins.

Duration:The amount of time monitored before the metric and threshold values are compared. Does not include cool down period. 10 minutes. So it will first wait for 10 mins to do the comparision again .Once done if the condiiton is satisfied it will check for cool down counter and if that is true as well then does the action

I tested this in the lab (https://imgur.com/a/xJLyAvY). With duration 10 minutes and cooldown 10 minutes, the scale up happens every 10 minutes. It is the same for the first round and all rounds of scale up. I suggest correct answer Box1: 10 Minutes, Box2: 9

If SS1 scales to whatever, what is the time to NEXT scale out ?

Box 1: 20 min Box-2: 9 machine is correct, choose the same cleared with 900 on 17th October 2021

10 mins and 9

https://docs.microsoft.com/en-us/azure/azure-monitor/autoscale/autoscale-understanding-settings scaleAction cooldown The amount of time to wait after a scale operation before scaling again. For example, if cooldown = “PT10M”, Autoscale does not attempt to scale again for another 10 minutes. The cooldown is to allow the metrics to stabilize after the addition or removal of instances. 1st dropdown is 10 minutes Since none of the scaling conditions are met, the number of virtual machines in the scale set will remain the same 2nd drop down is 9