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Question 23

A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the `Minimum number of instances` to 6 and `Maximum number of instances` to 8.

After correctly configuring scaling settings, the customer adds a scaling rule `Remove 5 ECS instances`, and creates a scheduled task based on this rule.

And then, the customer checks the scaling group and see it already contains 8 valid ECS instances, he/she then enables this scaling group immediately.

How many ECS instances are left in the scaling group when the scheduled task is activated once?

    Correct Answer: B

    The scaling group sets a minimum number of instances to 6 and a maximum number of instances to 8. When the scheduled task to 'Remove 5 ECS instances' is activated, it attempts to reduce the number of ECS instances from 8 to 3. However, the minimum number of instances allowed is 6. Therefore, the auto-scaling service will not reduce the number of instances below the minimum, maintaining 6 instances in the scaling group.

Discussion
Jackie911Option: B

6 as Minimum number of instance

MRTASHOption: B

6 as Minimum number of instance

AlibabaVNOption: D

why not 5 left

TanPHAM304Option: C

Max is 8, already have 8. Absolutely is Zero - C

TanPHAM304

Max is 8, already have 8, remove 5 ECS instances

lhorisOption: B

B. Six If as a result of executed a scaling rule, the number of ECS instances in a scaling group is less than the minimum size value or greater than the maximum size value of instances allowed for the group, auto-scaling will automatically adjust the number of instances to be added or removed, so that the minimum or maximum instance values cannot be exceeded.

ismail069Option: B

Should be 6. 6 is the minimum instance

borexKOption: B

should be 6 as minimum instance can be run is equal to 6

alien_kingOption: B

For example, let's say a scaling group is created and it's set to a maximum instance count of three ECS instances, and a minimum count of two and let's say that currently there are two ECS instances in the group and a scaling rule is added to add three more instances, well in this case, auto-scaling only adds one instance. This automatic adjustment stops the maximum instance count being exceeded and likewise, if the group now contains three instances and we have a scaling rule that is going to remove five instances, there are only three instances in the groups, so we can't possibly remove five and if we were to remove all three of those instances, then the size of the group would be zero, which is less than, in this scenario, the minimum size of two. https://cloudacademy.com/course/alibaba-auto-scaling-1247/scaling-rules/