AWS Certified Sysops Administrator Associate · Free Practice Question Medium
Question 16
A company uses an Amazon ElastiCache Memcached cluster for a popular website. The SysOps Administrator received reports of performance issues. The Administrator checked the CloudWatch metrics and noticed high CPU utilization.
Which remediation steps should be taken to resolve this issue? (Select TWO.)
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A
Vertically scale the ElastiCache cluster by changing the node type.
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B
Create an Auto Scaling group for the ElastiCache cluster.
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C
Add a larger Amazon EBS volume to the ElastiCache cluster nodes.
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D
Add a load balancer to route traffic to the ElastiCache cluster.
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E
Add additional nodes to the existing ElastiCache cluster.
Reveal correct answers
Correct answers: A, E
Explanation
You can scale ElastiCache Memcached clusters either horizontally or vertically.
Scaling Memcached Horizontally: The Memcached engine supports partitioning your data across multiple nodes. Because of this, Memcached clusters scale horizontally easily. A Memcached cluster can have from 1 to 20 nodes. To horizontally scale your Memcached cluster, merely add or remove nodes.
Scaling Memcached Vertically: Scale vertically by using a different node type. When you scale your Memcached cluster up or down, you must create a new cluster. Memcached clusters always start out empty unless your application populates it.
CORRECT: "Add additional nodes to the existing ElastiCache cluster" is the correct answer.
CORRECT: "Vertically scale the ElastiCache cluster by changing the node type" is also a correct answer.
INCORRECT: "Add a larger Amazon EBS volume to the ElastiCache cluster nodes" is incorrect. This will not resolve CPU issues for the nodes.
INCORRECT: "Add a load balancer to route traffic to the ElastiCache cluster" is incorrect. You cannot use a load balancer to distribute traffic to ElastiCache nodes, you must map the key space in your application.
INCORRECT: "Create an Auto Scaling group for the ElastiCache cluster" is incorrect. You cannot use Auto Scaling for ElastiCache nodes.
References:
https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/Scaling.html
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