Redis 7.4 is ideal for use cases requiring high speed and low latency, such as caching and real-time analytics. Amazon Aurora PostgreSQL 16 Compatible is better suited for applications requiring strong data consistency, durability, and complex querying capabilities.
| Attribute | Redis 7.4 | Amazon Aurora PostgreSQL 16 Compatible |
|---|---|---|
| Data Storage Model | In-memory key-value database, distributed cache, and message broker. | Relational |
| Scalability | Horizontal scaling via Redis Cluster (data sharding and replication). Vertical scaling also possible. | Automated horizontal scaling with Amazon Aurora PostgreSQL Limitless Database. Compute and memory resources can be scaled up or down. Aurora Serverless automatically scales capacity. Supports up to 15 read replicas. |
| Replication and High Availability | Built-in replication. Redis Cluster provides high availability with automatic failover. Redis Enterprise offers data replication to another instance. | Each 10GB chunk replicated six ways across three Availability Zones. Supports Multi-AZ deployments with Aurora Replicas for automated failover. Aurora Global Database enables cross-region replication. |
| ACID Compliance | Generally considered ACID compliant due to single-threaded nature, but lacks full Durability. | ACID compliant |
| Supported Data Types | Strings, Hashes, Lists, Sets and Sorted Sets, Bitmaps, Streams, Geospatial, JSON, Probabilistic data types, Time series, Vector sets, bfloat16 and float16. | Supports a wide range of standard PostgreSQL data types |
| Query Language | Redis command set (not SQL). Redis Query Engine enhanced for indexing and querying. | PostgreSQL. Compatible with standard PostgreSQL expressions and functions. |
| Performance | Low-latency reads and writes. New data types (bfloat16, float16) can reduce memory usage and latency. | Up to 3x the throughput of standard PostgreSQL on the same hardware. Employs techniques to fully leverage compute, memory, and networking. |
| Memory Management | Data stored in RAM. Auto Tiering (Redis Enterprise) allows data to span RAM and SSD. Hash field expiration for efficient memory management. | Isolates the database buffer cache from the database process, allowing the cache to survive a database restart. |
| Security Features | Password authentication (requirepass), ACLs, TLS support, command disabling/renaming, encryption at rest. | Encryption at rest using keys managed through Amazon Key Management Service (KMS). Uses SSL (AES-256) to secure data in transit. Integration with Amazon Identity and Access Management (IAM) for resource-level permissions. |
| Integration Capabilities | Integrates with existing applications and infrastructure. Redis Data Integration (RDI) for data synchronization. Azure Managed Redis integration. | Integrates with other AWS services |
| Community Support and Documentation | Strong community and extensive documentation. | Leverages the PostgreSQL community. Amazon provides comprehensive documentation. |
| Cost | Redis Community Edition 7.4 is dual-licensed (RSALv2 and SSPLv1). Commercial use may require licensing. Consider infrastructure and operational costs. | Cost-effective solution. Aurora Serverless offers a discounted pricing option for predictable workloads. |
| Durability | Lacks full Durability (D) in ACID compliance | ACID Compliant |
| Horizontal Scaling | Horizontal scalability with Redis Cluster | Automated horizontal scaling with Amazon Aurora PostgreSQL Limitless Database |
| Read Replicas | Not available | Supports up to 15 read replicas. |