Cache Event Notifications are messages sent by Amazon ElastiCache to inform you about important events related to your cache clusters, such as cache node failures, replication group modifications, or the completion of backups. You can subscribe to these events using Amazon Simple Notification Servi…Cache Event Notifications are messages sent by Amazon ElastiCache to inform you about important events related to your cache clusters, such as cache node failures, replication group modifications, or the completion of backups. You can subscribe to these events using Amazon Simple Notification Service (SNS) and receive notifications through your preferred communication channels, such as email or SMS. This feature helps you monitor and respond to critical events in your cache infrastructure, enabling you to maintain the health and performance of your cache clusters proactively.
Guide: Cache Event Notifications in Amazon ElastiCache
What is Amazon ElastiCache? Amazon ElastiCache is a service by AWS that makes it easy for developers to set up, manage, and scale a distributed in-memory data store or cache in the cloud. It provides a cost-efficient, resizable capacity for managing data and caching layers.
Why are Cache Event Notifications important? Cache Event notifications are crucial as they keep us informed about any critical operational changes or failures in an ElastiCache environment. They can help ensure system reliability by alerting us to problems and allowing us to respond more quickly.
What are Cache Event Notifications? Cache Event Notifications are messages sent by Amazon ElastiCache about significant changes or errors in our cache clusters. The system sends these notifications to the Amazon Simple Notification Service (SNS), which then forwards them to subscribed endpoints.
How do Cache Event Notifications work? When a significant event occurs that affects an ElastiCache cluster, the system sends a message to an SNS topic. This topic then triggers notifications to all subscribers regarding the event. Subscribers may choose different methods of receiving these notifications such as email, SMS, or even AWS Lambda functions.
Exam Tips: Answering Questions on Cache Event Notifications
Keep in mind the purpose and functionality of Cache Event Notifications within the AWS ecosystem.
Understand the event flow, starting from an event occurring in ElastiCache, to the notification sent via SNS, and finally the notification being received at the subscribed endpoints.
Remember that topic subscribers can choose how they receive their notifications.
AWS Certified Solutions Architect - Cache Event Notifications Example Questions
Test your knowledge of Cache Event Notifications
Question 1
A news website wants to cache content from its Contentful CMS to reduce latency for its readers. Which AWS caching mechanism would provide key-based event notifications to keep cache up to date with the CMS?
Question 2
A company has an application that extensively accesses data from AWS DynamoDB. Due to performance issues, they want to implement a caching layer. Which event notification would be the BEST for maintaining data consistency between the cache and DynamoDB?
Question 3
A company wants to minimize the time spent on expensive database queries by caching the results. They also want timely notifications of cache misses. Which AWS service is BEST for this purpose?
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