#🧱 Building Block: Amazon DynamoDB

#Overview

DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability.

#Key Concepts

• Key-Value & Document Store: Supports flexible schemas.
• Partition Key: Used to distribute data across multiple partitions for scalability.
• Sort Key: Used to group data within a partition and enable efficient range queries.
• WCU/RCU: Write/Read Capacity Units define the throughput.

#Features

• TTL: Automatically delete items after a certain time.
• Streams: Capture every change to items in a table.
• DAX: In-memory cache for DynamoDB.

#When to Use

• High Write Throughput: Like inventory tracking during a flash sale.
• Serverless Apps: No server management needed.
• Session Stores: Highly available and scalable.

#Trade-offs

• Pros: Zero management, predictable performance, strong integration with AWS.
• Cons: Limited query capabilities compared to SQL, cost can be high if not optimized.