Amazon ElastiCache and RDS Cache Invalidation Strategy Quiz

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Questions and Answers

What is the maximum throughput for reads when using the Bursting Throughput Mode in Amazon EFS?

200 MiB/s

50 MiB/s

150 MiB/s

100 MiB/s (correct)

Which Performance Mode in Amazon EFS is suitable for latency-sensitive use cases like web servers and CMS?

Provisioned

General Purpose (correct)

Throughput Mode

Max I/O

In Amazon EFS, what is the purpose of the Performance Mode 'Max I/O'?

High latency and throughput for big data processing (correct)

Cost-effective storage for infrequently accessed files

Low latency and throughput for web servers

Automatically scaling throughput based on workloads

What is the purpose of the Storage Tier 'Infrequent access (EFS-IA)' in Amazon EFS?

For frequently accessed files at a lower price Signup and view all the answers

Which Throughput Mode in Amazon EFS allows you to set your own throughput regardless of storage size?

Provisioned Signup and view all the answers

In Amazon EFS, which Performance Mode automatically scales throughput based on your workloads?

Elastic Signup and view all the answers

What is one of the hard things in Computer Science, according to the text?

Cache invalidation Signup and view all the answers

Which ElastiCache solution supports Data Durability using AOF persistence?

ElastiCache for Redis Signup and view all the answers

What type of authentication does Memcached support?

SASL-based authentication Signup and view all the answers

Which ElastiCache solution is suitable for partitioning data through sharding?

Memcached Signup and view all the answers

Which technology is responsible for translating human-friendly hostnames into machine IP addresses?

DNS Signup and view all the answers

Which ElastiCache solution supports Sets and Sorted Sets?

Redis Signup and view all the answers

What does Redis AUTH provide as an extra level of security?

"password/token" Signup and view all the answers

Which feature ensures no stale data in a cache when adding or updating data?

"Write Through" Signup and view all the answers

Which ElastiCache solution supports lazy loading that can result in stale data in the cache?

"Lazy Loading" Signup and view all the answers

'Gaming Leaderboards' are computationally complex and rely on which ElastiCache feature for real-time ranking?

"Sorted Sets" Signup and view all the answers

What protocol is used when creating a new Aurora DB Cluster from an existing one?

Copy-on-write protocol Signup and view all the answers

In Amazon RDS and Aurora, what is the main purpose of using IAM roles for authentication?

Connecting to the database instead of using username/password Signup and view all the answers

What is the primary role of the fully managed database proxy for RDS?

Reducing stress on database resources and minimizing open connections Signup and view all the answers

Which service is analogous to ElastiCache for managing Redis or Memcached?

Amazon RDS Proxy Signup and view all the answers

What kind of encryption must be defined at launch time for Database master & replicas in AWS KMS?

At-rest encryption Signup and view all the answers

What is a benefit of creating a new Aurora DB Cluster from an existing one?

Involves faster copy-on-write operations Signup and view all the answers

In Amazon RDS and Aurora, how are credentials securely stored according to best practices?

Encrypted using AWS Secrets Manager Signup and view all the answers

What is the primary purpose of an ElastiCache in-memory database?

Reducing load on databases for read intensive workloads Signup and view all the answers

What option should be undertaken if one needs to encrypt an unencrypted Amazon RDS database?

Go through a DB snapshot & restore process as encrypted Signup and view all the answers

Study Notes

Amazon EFS Throughput and Performance Modes

Maximum Throughput for Bursting Mode: Allows burst of up to 3,000 MB/s for reads.
Performance Mode for Latency-Sensitive Use Cases: General Purpose mode is optimized for applications requiring low latencies, such as web servers and content management systems (CMS).
Max I/O Purpose: Designed to enable an increase in operations per second for high throughput and large amounts of file access by scaling throughput with more storage.
Storage Tier - Infrequent Access (EFS-IA): Reduces costs for storing data that is not accessed frequently, offering lower pricing for long-term storage.
Throughput Mode for Custom Setup: Provisioned Throughput allows users to specify their own throughput independent of the storage size.
Auto-Scaling Performance Mode: General Purpose performance mode automatically adjusts throughput to match workload demands.

ElastiCache Solutions and Features

Data Durability with AOF Persistence: Redis supports data durability through Append-Only File (AOF) persistence, which logs every write operation.
Memcached Authentication: Supports simple, password-based authentication.
Sharding Capability: Redis solution is suited for partitioning data using sharding for horizontal scalability.
Protocol for Hostname Translation: DNS (Domain Name System) resolves human-friendly hostnames into machine-readable IP addresses.
Support for Sets and Sorted Sets: Redis supports advanced data structures like Sets and Sorted Sets.
Redis AUTH Security Feature: Provides an additional authentication mechanism to enhance security for Redis databases.
Feature for Cache Consistency: Cache invalidation ensures no stale data by updating or removing outdated data on changes.
Lazy Loading Capability: Memcached utilizes lazy loading, which may introduce stale data in the cache for cost-efficiency.
Real-time Ranking for Gaming Leaderboards: Relies on Sorted Sets in ElastiCache for efficient and fast ranking updates.

Amazon RDS and Aurora Insights

Cluster Creation Protocol: AWS Aurora uses the same protocol as the original cluster for creating a new DB cluster.
IAM Roles for DB Authentication: Provide secure and scalable access management, allowing applications to assume roles for API calls instead of using static credentials.
Managed Database Proxy Purpose: Helps improve application scalability and enhances security by managing database connections effectively.
Service for Redis/Memcached Management: Amazon ElastiCache is the managed service analogous to Redis or Memcached solutions.
AWS KMS Encryption Requirements: Encryption must be specified during the initial launch of database masters and replicas.
Benefits of New Aurora DB Cluster Creation: Enables scalability and cost-efficiency by quickly duplicating the configuration of existing clusters.
Best Practices for Credential Storage: Utilizes AWS Secrets Manager to securely store and manage database credentials.
Primary Purpose of ElastiCache: Acts as an in-memory database to enhance application speed and service responsiveness.
Encryption Strategy for Existing RDS Databases: Create a snapshot of the unencrypted database and restore it as an encrypted instance.

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Description

Test your knowledge on how to relieve load in Amazon RDS Cache and implement an invalidation strategy to ensure only the most current data is utilized. This quiz covers concepts such as cache hits, cache misses, reading from the database, writing to cache, and the overall architecture of ElastiCache solutions.