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Transactions ensure database operations are reliable using ACID properties.

Data residency is crucial for compliance with laws about where data can be stored.

Secure API design requires multiple strategies to protect sensitive data and access.

Retention policies help manage how long data is kept in databases.

Idempotency ensures that repeated operations in APIs do not cause duplicate effects.

Database per Service ensures each microservice owns its data, reducing dependencies.

REST API design focuses on creating clean, efficient, and scalable web services.

The CAP Theorem explains the trade-offs in distributed systems during network failures.

Read-after-write consistency ensures users see their latest updates immediately.

2-Phase Commit helps maintain data consistency in transactions across multiple databases.

Data warehouses help businesses analyze large amounts of data for better decision-making.

Availability is about access; reliability is about correct performance.

Fail Fast means stopping quickly on errors, while Fail Safe ensures safety in failures.

Disaster Recovery Testing verifies that your recovery plan works effectively in real situations.

Downsampling and aggregation reduce data volume while preserving essential trends.

Time-series databases are designed to store and query time-stamped metrics efficiently.

Quorum-based replication determines how many database replicas must agree for reads and writes.

OLTP handles transactions while OLAP is for data analysis and reporting.

Quorum Reads ensure data consistency by querying multiple replicas in distributed systems.

Point-in-Time Recovery allows databases to be restored to a specific moment before data loss.

Cache penetration occurs when requests for non-existent data overload the database.

Sharding splits databases into smaller parts to improve performance and scalability.

The choice between SQL and NoSQL databases depends on your application's specific needs.

Choosing between a shared database and a database per service affects system design significantly.