Scaling policies (target tracking, step, simple) in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the type of scaling policy for automatic scaling.

AWS

"PolicyType": "[1]"

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AStepScaling

BTargetTrackingScaling

CManualScaling

DSimpleScaling

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing TargetTrackingScaling when asked for simple scaling type.

The SimpleScaling policy type triggers scaling based on a single adjustment.

2fill in blank

medium

Complete the code to set the target value for a target tracking scaling policy.

AWS

"TargetTrackingConfiguration": {"TargetValue": [1]

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A75

B50

C100

D25

Attempts:

3 left

💡 Hint

Common Mistakes

Using 100 which might cause constant scaling up.

The TargetValue defines the metric value the scaling policy tries to maintain, commonly set to 50% for CPU utilization.

3fill in blank

hard

Fix the error in the step scaling adjustment configuration by completing the missing operator.

AWS

"StepAdjustments": [{"MetricIntervalLowerBound": 0, "ScalingAdjustment": [1]]

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A1

B0

C-1

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using negative values which would scale in instead of out.

The ScalingAdjustment value of 1 means the capacity will increase by one unit when the metric exceeds the lower bound.

4fill in blank

hard

Fill both blanks to define a step scaling policy with a lower bound and scaling adjustment.

AWS

"StepAdjustments": [{"MetricIntervalLowerBound": [1], "ScalingAdjustment": [2]]

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A10

B5

C1

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up lower bound and scaling adjustment values.

The lower bound is set to 10, and the scaling adjustment is 1 to increase capacity when the metric exceeds 10.

5fill in blank

hard

Fill all three blanks to configure a target tracking scaling policy with customized parameters.

AWS

"TargetTrackingConfiguration": {"PredefinedMetricSpecification": {"PredefinedMetricType": "[1]"}, "TargetValue": [2], "DisableScaleIn": [3]

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AASGAverageCPUUtilization

B50

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Setting DisableScaleIn to true when scale-in is desired.

This configuration tracks average CPU utilization with a target of 50%, and allows scaling in by setting DisableScaleIn to false.