Your team plans to configure a distributed in-memory data store in Amazon ElastiCache for Redis.
The Redis node type is M5
Your manager asks you to ensure that the Redis datastore has very high performance with low network latency.
Which of the following options helps to achieve the requirement?
Click on the arrows to vote for the correct answer
A. B. C. D.Correct Answer: D.
Option A is incorrect because ElastiCache for Redis with cluster mode enabled can enhance reliability and availability.
But the network throughput is not improved.
Option B is incorrect because the R4 node type is Memory-optimized.
It may not help to improve the network performance at all.
Option C is incorrect because Multi-threading is only supported in ElastiCache Memcached instead of Redis.
For details, please check https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/SelectEngine.html.
Option D is CORRECT because enhanced I/O handling in ElastiCache Redis can boost the Redis performance with very low latencies.
This feature is available in all AWS regions.
References:
https://aws.amazon.com/blogs/database/boosting-application-performance-and-reducing-costs-with-amazon-elasticache-for-redis/, https://aws.amazon.com/about-aws/whats-new/2019/03/amazon-elasticache-for-redis-503-enhances-io-handling-to-boost-performance/?nc1=h_ls, https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/SelectEngine.htmlOption B, replacing the node type with R4, may not necessarily guarantee high performance with low network latency as it only changes the instance type and does not address network latency.
Option A, Cluster Mode enabled in the ElastiCache cluster, is a good option to consider. Cluster mode allows you to partition your data across multiple Redis shards, which can improve performance by reducing the amount of data that each node needs to handle. Additionally, cluster mode allows for horizontal scaling, so you can add more nodes to your cluster as needed to further improve performance.
Option C, Multi-threading in the ElastiCache Redis cluster, is not a relevant option as Redis is already single-threaded by design. Redis utilizes a single event loop to process requests, so attempting to implement multithreading would not improve performance.
Option D, Enhanced I/O handling in the ElastiCache cluster, is also a good option to consider. ElastiCache provides features like write-through caching, which can help reduce the amount of network traffic by caching frequently accessed data in memory. Additionally, ElastiCache supports read replicas, which can help distribute read requests across multiple nodes, further reducing network latency.
Therefore, the best options to achieve high performance with low network latency are A, Cluster Mode enabled in the ElastiCache cluster, and D, Enhanced I/O handling in the ElastiCache cluster.