Master AWS Databases: Tips for Your Exam

If you’re preparing for an AWS certification exam, you’ll need to know databases. This article covers what you need for the Database section.

1. Understand Different Database Types

AWS has several database types: relational, NoSQL, and data warehousing. Know the differences between them and when to use each:

• Relational databases (RDS): Good for structured data with transaction support. Examples: MySQL, PostgreSQL, Oracle, Aurora, MariaDB.
• NoSQL databases (DynamoDB) work well for unstructured or semi-structured data that needs low latency and high throughput. Popular for large-scale applications.
• Data warehousing (Redshift): Built for analytics and business intelligence with massive parallel processing.

2. Learn the Key Features of Amazon RDS

Amazon RDS has several features you should know:

• Automatic backups and snapshots
• High availability through Multi-AZ deployments
• Scalability via reading replicas and vertical scaling
• Encryption at rest and in transit
• Automated patching

3. Know When to Use Amazon Aurora vs Other RDS Solutions

Amazon Aurora is a managed relational database compatible with MySQL and PostgreSQL. It performs better than other RDS options:

• Up to five times faster than MySQL
• Up to three times faster than PostgreSQL
• Six copies of data stored across three Availability Zones

Aurora costs more than other RDS options, though.

4. NoSQL Database Diving: Amazon DynamoDB

Key things about DynamoDB:

• Supports key-value pairs and document formats
• Serverless, scales automatically based on demand
• Consistent performance
• Fine-grained access control and encryption
• Global tables and data replication across regions

5. Remember Amazon Redshift for Data Warehousing

Amazon Redshift is a managed data warehousing service. Key features:

• Scales from TB to PB of data
• Columnar storage for analytics performance
• Integrates with S3 and Glue for data ingestion

6. Get Familiar with AWS Database Migration Service (DMS)

AWS DMS migrates databases between engines or from on-premise to the cloud:

• Handles homogeneous (MySQL-to-MySQL) or heterogeneous (Oracle-to-DynamoDB) migrations
• Supports Continuous Data Replication for minimal downtime

7. Don’t Forget Elasticache

Amazon ElastiCache is a managed caching service:

• Supports Memcached and Redis
• Use it with RDS or DynamoDB to cache frequently accessed data

How to Become an AWS Expert

AWS Mind Map - Databases

Practice with AWS databases firsthand. The best way to learn is by building something real.

Conclusion

For the Database section of your AWS exam, understand the different database types AWS offers, know their key features, and learn which use cases fit each one. Practice with these databases and you’ll be ready. Good luck!