http://fabienvauchelles.github.io/stweb-nosql

1. NOSQL

2. WHAT IS NOSQL ?

3. PROBLEM
NoSQL comes from Big Data, to stored large data volume:
million to billions rows!
SQL is too slow.

4. GOALS
SQL are suitable for modeling, not for use.
NoSQL stores are suitable for use, not for modeling.

5. FEATURES
Schemaless
Scalable, because:
No ACID (Atomicity, Consistency, Isolation, Durability)
No link between 2 elements ‐> Very fast

6. DATABASES TYPES
Key‐value
Column
Document
Graph

7. KEY-VALUE / OVERVIEW
Key Value
jfav Jean Favier
pi 3.14
slama Serge Lama
pic [image object]

8. KEY-VALUE / GOALS
WHAT IS IT ?
Distributed hashmap.
WHY IS IT USED ?
It's simple and store data in memory (cheap).
EXAMPLE

9. COLUMN / OVERVIEW
Key Name Job School
jfav Jean Favier Teacher Smarterer
School
mnicolas Martin
Nicolas
Policeman
slama Serge Lama Singer
rcalaval Robert
Calaval
Teacher Victor Hugo

10. COLUMN / GOALS
WHAT IS IT ?
Super distributed hashmap (many values for a key).
WHY IS IT USED ?
It's fast and store more complex data than a hashmap.
EXAMPLE

11. DOCUMENT / OVERVIEW
{
'name':'JeanFavier',
'address':{
'street':'Applestreet',
'city':'Paris'
},
'job':'Teacher'
}

12. DOCUMENT / GOALS
WHAT IS IT ?
JSON document, with nested content.
WHY IS IT USED ?
It store heterogeneous documents.
EXAMPLE

13. GRAPH / OVERVIEW

14. GRAPH / GOALS
WHAT IS IT ?
Graph of JSON document.
WHY IS IT USED ?
It simplifies the modeling of complex relationships.
EXAMPLE

15. SPEED BY TYPE

16. FROM SQL TO NOSQL

17. DENORMALIZE 1-1 RELATION

18. © Fabien Vauchelles (2015)
DENORMALIZE 1-N RELATION