Amazon DocumentDB: NoSQL Document Database

• Amazon DocumentDB is a fully managed NoSQL document database service
• It is compatible with MongoDB
• It's designed for applications needing scalable and high-performance to manage JSON-like documents

Key Features

• Compatible with MongoDB 3.6 and 4.0 APIs, allowing easy migration without significant code changes.
• Supports common MongoDB features like CRUD operations, indexes, aggregation, and query capabilities.
• Designed for large-scale applications with auto-scaling storage from 10 GB to 64 TB.
• Read replicas are supported to offload read traffic, enhance performance, and improve availability.
• High availability is achieved by replicating data across three Availability Zones (AZs).
• Automatic failover is ensured to prevent data loss.
• Automated backups and point-in-time recovery allow restoring the database to any point within the retention period.
• Optimized for high throughput and low-latency access.
• Employs a distributed architecture for efficient data management, even with large data volumes and concurrent requests.

Serverless

• Does not offer a native serverless option like Aurora Serverless.
• Scalable architecture automatically handles increasing storage and compute capacity based on application needs.
• Compute capacity can be scaled with right-sized instances and read replicas.
• Replica nodes can be added or removed to scale read capacity without manual intervention.

Security

• Supports encryption at rest using AWS Key Management Service (KMS) for data, backups, and snapshots.
• Uses TLS/SSL encryption for data in transit to ensure secure communication.
• Integrates with AWS Identity and Access Management (IAM) for fine-grained access control to the database and resources.
• IAM roles and policies can be defined to control access for authorized users and services only.
• Can be deployed inside an Amazon Virtual Private Cloud (VPC), isolating the database from the public internet.
• Security groups and network ACLs can control inbound and outbound access to the DocumentDB cluster.
• Integrates with Amazon CloudWatch for monitoring and alerting of database performance and metrics.
• Integrates with AWS CloudTrail, recording all API calls to DocumentDB for auditing and compliance tracking.
• Built with various security certifications and meets compliance standards like HIPAA, SOC 1/2/3, PCI DSS, and ISO.

Pricing

• Charged based on instance run time
• Fees for s3 storage and I/O operations
• Additional costs for backups beyond free retention limits

Conclusion

• Highly scalable, fully managed NoSQL document database service.
• Compatible with MongoDB.
• Provides high availability, performance, and secure data management.
• Offers elasticity and automatic scaling to meet changing workload demands, despite not being natively serverless.
• Security features include encryption, network isolation, and integration with AWS IAM and CloudTrail.
• Suited for applications needing flexible, schema-less data storage with AWS security and scalability.