An Auto Scaling group is defined with MinSize=1, MaxSize=3, and DesiredCapacity=2. You update the configuration to MinSize=4. What will happen to the running instances?

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AWS - Auto Scaling

An Auto Scaling group is defined with MinSize=1, MaxSize=3, and DesiredCapacity=2. You update the configuration to MinSize=4. What will happen to the running instances?

AAn error will prevent the update

BThe group will scale out to 4 instances automatically

CThe group will scale in to 1 instance

DThe group will keep 2 instances running

Step-by-Step Solution

Solution:

Step 1: Understand MinSize increase effect
Increasing MinSize to 4 means the group must have at least 4 instances running.
Step 2: Check DesiredCapacity and MaxSize
DesiredCapacity is 2, less than new MinSize 4, so DesiredCapacity will be adjusted to 4, scaling out instances.
Final Answer:
The group will scale out to 4 instances automatically -> Option B
Quick Check:
MinSize increase triggers scaling to meet new minimum [OK]

Quick Trick: Increasing MinSize scales out to meet new minimum [OK]

Common Mistakes:

MISTAKES

Expecting no change when MinSize increases above DesiredCapacity
Thinking update will fail due to MinSize > MaxSize

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An Auto Scaling group is defined with MinSize=1, MaxSize=3, and DesiredCapacity=2. You update the configuration to MinSize=4. What will happen to the running instances?

Step 1: Understand MinSize increase effect

Step 2: Check DesiredCapacity and MaxSize

Final Answer:

Quick Check:

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