You are defining a Redis cluster using the AWS Elasticache service.
You need to define common values across the nodes for memory usage and item sizes.
Which of the following components of the ElastiCache service allows you to define this?
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A. B. C. D.Answer - B.
The AWS Documentation mentions the following.
Cache parameter groups are an easy way to manage runtime settings for supported engine software.
Parameters are used to control memory usage, eviction policies, item sizes, and more.
An ElastiCache parameter group is a named collection of engine-specific parameters that you can apply to a cluster.
By doing this, you make sure that all of the nodes in that cluster are configured exactly in the same way.
Option A is incorrect because an endpoint is the unique address your application uses to connect to an ElastiCache node or cluster.
Option C is incorrect because the security group is used to controls access and does not help with this.
Option D is incorrect because the subnet group cannot be used to define values in Elasticache.
For more information on the components for Elasticache, please refer to the below link-
https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/WhatIs.Components.htmlThe correct answer is B. Parameter Groups.
Parameter Groups are a key feature of the AWS ElastiCache service that allows you to define and manage a set of configuration parameters that are applied to all nodes in a Redis cluster. These parameters are used to control various aspects of the cluster, such as memory usage, item sizes, and other performance-related settings.
When you create a Redis cluster in ElastiCache, you can specify a Parameter Group that contains a set of pre-defined configuration parameters. You can also create your own custom Parameter Group that contains your own set of configuration parameters that are specific to your use case.
Using Parameter Groups, you can ensure that all nodes in the Redis cluster are configured consistently and with the same set of parameters, which can help ensure optimal performance and reliability of the cluster.
Endpoints, Security Groups, and Subnet Groups are also important components of the ElastiCache service, but they do not allow you to define common values for memory usage and item sizes across the nodes in a Redis cluster.
Endpoints are used to access the Redis cluster from your application code or other AWS services.
Security Groups are used to control network access to the Redis cluster by defining inbound and outbound rules that specify which IP addresses or security groups are allowed to access the cluster.
Subnet Groups are used to specify the subnets in which the Redis cluster will be deployed, and to specify which Availability Zones the cluster will use for high availability.