# 08 – Modern Distributed Databases

Modern databases bring together **SQL + strong guarantees + global scale**.

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## 📌 Overview

- [ ] Understand why new databases were created beyond classic RDBMS/NoSQL
- [ ] Learn design patterns like **distributed SQL** and **global consistency**

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## 🧱 Systems

### [[Google Spanner]]

- [ ] Understand TrueTime and globally-distributed transactions

### [[CockroachDB]]

- [ ] Learn how it mimics PostgreSQL while scaling horizontally

### [[YugabyteDB]]

- [ ] Understand its architecture for transactional and analytical workloads

### [[TiDB]]

- [ ] Learn its TiKV/TiFlash architecture and MySQL compatibility

### [[PlanetScale]]

- [ ] Understand Vitess-based sharding and Git-style workflows

### [[SingleStore]]

- [ ] Learn its unified engine for transactional + analytical workloads

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## 🔗 Connections

- Deeply connected to [[01 - Fundamentals]] (CAP, sharding, replication)
- Builds on [[06 - Internals]] knowledge (consensus, storage engines)
- Competes or integrates with tools in [[04 - Big Data]] and [[05 - Cloud Databases]]