Cluster Configuration
Amazon ElastiCache allows configuration of groups of cache nodes called clusters. Each cluster can have one or multiple shard(s) with replication depending on the selected engine (either Redis or Memcached) for safe and efficient scaling. Clusters use one or more cache node types to determine the amount of memory and compute power assigned to a cache node. It is important to choose the right cluster configuration according to the data volume, connection rates, and read/write performance needed. Auto Scaling, failover, and backups are key features in a robust cluster configuration.
Guide on AWS Elasticache Cluster Configuration
ElastiCache is a web service that makes it easy to deploy and run Memcached or Redis protocol-compliant server nodes in the cloud.
Why it is important:
Elasticache Cluster Configuration is important because it allows you to seamlessly set up, manage, and scale distributed in-memory cache environment in the AWS Cloud. It provides high performance, resizable capacity while offloading network and database operations.
What it is:
An ElastiCache cluster configuration consists of a cluster with one or more node instances. Each of these node instances runs a cache engine which stores data in memory for low-latency read and writes operations.
How it works:
You provision, configure, and scale nodes within your cluster to handle your application's load. You can choose to partition your data across multiple node instances or replicate it for high availability. The service ensures fault tolerance by detecting and replacing failed nodes and providing optional Multi-AZ functionality for Redis.
Exam Tips for Answering Questions on Cluster Configuration:
1. Understand the core components of ElastiCache cluster configuration including the Nodes, the Cache Engine and the Partitioning options.
2. Be familiar with the scalability and availability options with regards to node scales and Multi-AZ functionality.
3. Appreciate the significance of read replicas for high availability.
In the examination, questions on ElastiCache Cluster Configuration will test your understanding on topics such as the configuration process, node management, data partitioning, and high availability options.
AWS Certified Solutions Architect - Amazon ElastiCache Example Questions
Test your knowledge of Amazon Simple Storage Service (S3)
Question 1
A company wants to reduce costs for a multi-tier web application. The application requires a highly available PostgreSQL database. Which Amazon RDS configuration provides lower cost while maintaining high availability?
Question 2
You manage a multimedia data processing service on AWS. Your cluster is designed on the Spot Market to reduce costs. Your management is concerned about the possible impact of Spot Instance terminations. Which approach can help reduce the impact?
Question 3
You are designing a cluster configuration for a photo processing application. The application requires low latency access to Amazon S3 for reading/writing objects. Which configuration ensures the lowest latency?
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