Non Relational DBMS (Nosql): MongoDB, Cassandra, Redis, Neo4j

1. Non-Relational Databases
(NoSQL)
Ehsan Javanmard
Javanmard.ehsan@gmail.com

2. • Rigid (fixed schema)
• Stable Data
• Structured Data
• Flexible (schema-free)
• Scalable Data
• Unstructured Data (Semi-Structured)

3. • SQL databases store data in form of tables, rows, columns and records.
• This data is stored in a pre-defined data model.

5. Structured Query Language

9. &
Sensors Data
Apps/Devices
Logs

10. NoSQL database
A NoSQL database is a database that provides a mechanism to store and retrieve data
other than the tabular relations used in relational databases.
These databases are:
• schema-free
• support easy replication
• have simple API
• horizontal scaling
• Consistent or eventually consistent
• and can handle huge amounts of data

13. Schema Free
MongoDB
Cassandra
Redis
Neo4j

14. Scaling

15. MongoDB
Replication
Cassandra
Redis Neo4j

16. CAP theorem

17. CAP theorem(Eric Brewer)
New article: CAP Twelve Years Later: How the "Rules" Have Changed

19. Types of NoSQL databases:
• Document Oriented
• Key Value
• Column Oriented
• Graph