AWS Certified Data Analytics Specialty 2021 – Hands-On - ElastiCache Overview

The video tutorial introduces Elastic Cache, a managed caching technology in AWS, similar to RDS for databases. It covers two main technologies: Redis and Memcached. Redis is highlighted for its low latency and persistence, making it suitable for user sessions and distributed states. Memcached is noted for quick object retrieval but lacks persistence. The tutorial recommends Redis for most caching needs due to its overlapping features with Memcached. The video concludes with exam preparation tips and emphasizes the architectural aspects of Elastic Cache.

What is the primary purpose of AWS Elastic Cache?

• To provide in-memory caching solutions

• To manage relational databases

• To optimize network traffic

• To store large files

Which feature of Redis ensures that cache data is not lost after a reboot?

• Sharding

• Read replicas

• Persistence

• Multi-AZ

For which use case is Redis particularly suitable?

• Handling batch processing tasks

• Storing large media files

• Quick retrieval of static web pages

• Managing user sessions and leaderboards

What is a key difference between Memcached and Redis?

• Redis has higher latency than Memcached

• Memcached supports persistence by default

• Redis is more suitable for object storage

• Memcached does not survive reboots

Why is Redis recommended over Memcached?

• Redis is easier to configure

• Redis has a broader feature set

• Redis is cheaper to use

• Memcached is not supported by AWS