1. 1. NoSQL
2. 2. NoSQL
3. 1. 2.1. RDBMS - SQL
   2. 2.2. Problems with RDBMS in development
   3. 2.3. Problems with RDBMS in production
   4. 2.4. Scaling vertically
   5. 2.5. Scaling horizontally
   6. 2.6. CAP Theorem of distributed data storage
   7. 2.7. ACID
   8. 2.8. RDBMS - data is normalized
   9. 2.9. NoSQL common characteristics
   10. 2.10. CRUD
   11. 2.11. Features
   12. 2.12. Limitations
   13. 2.13. NoSQL Data Models
   14. 2.14. Document Store
   15. 2.15. MongoDB CLI - insert
   16. 2.16. MongoDB CLI - find
   17. 2.17. MongoDB CLI - update $inc
   18. 2.18. MongoDB CLI - update $push
   19. 2.19. Key-value store
   20. 2.20. Redis CLI
   21. 2.21. Wide Column Store families
   22. 2.22. Hadoop commands
   23. 2.23. Cassandra
   24. 2.24. Graph
   25. 2.25. When to use NoSQL
   26. 2.26. When not to use NoSQL
4. 3. Cassandra
5. 1. 3.1. Cassandra: Replication
   2. 3.2. Cassandra: Resources
6. 4. Hadoop
7. 1. 4.1. Hadoop notes
   2. 4.2. Hadoop ecosystem
   3. 4.3. Hadoop commands
   4. 4.4. Hadoop entities
   5. 4.5. Hadoop entities