This document introduces Neo4j, a graph database developed by Neo Technology. Neo4j uses a graph data model with nodes, edges, and properties to represent and store data, and relationships and connectivity. It discusses how Neo4j can be used to model complex relationships and network-like data in a more intuitive way than traditional SQL databases. Examples are provided showing how social networks and friend networks can be modeled and queried using Neo4j. Performance, scalability, and support for multiple programming languages are also discussed.

1. Build Facebook Like
Relationships
with Neo4j
by Von Stark

2. Von Stark
I am : Starter, Programmer ,Backpacker
Use : Ruby, Rails, Erlang, Neo4j
co-founder at meetcliv.com
founder at neo4j.tw
Engineer at Roodo tech
co-founder at theprosbank.com
co-founder at envionow.com
Sales at 365biotech

3. 4 W & 1 H
What Why Who When
How

4. What is Neo4j
Java & Lucene - NeoTechnology
Embedded Document
High Availability & FailOver.
A(atomicity) C(consistency) I(isolation) D(durability)
Graph Database

5. What can it do?
Social Network
Graph Network
Complex Relationships
Make database like natural

6. What is the difference as
Object Oriented DB
Data preset as Node & Edge (Objects)
More functions to traverse
Friendly API
Schema = set of Class (Independent)

7. Why to use graph - Web3.0
1999 2000 2010 2020

8. Why to use Graph - Complexity

9. Why to use Graph - Whiteboard Friendly

10. Why to use Graph - Whiteboard Friendly

11. Why to use graph - Reasons
( )
-> , ->
SQL
SQL Join

12. Who use graph

13. When to use graph
Graph
SQL Key/Vale NoSQL

14. When to use graph
Graph
SQL Key/Vale NoSQL

15. How is the performance

16. Interested?

17. Connect
Ruby / Python / Clojure / PHP /
Java / Scala / Erlang / Groovy /
Restful ....
Rails / Grails / Griffon / Qi4j /
Roo...

18. Clients
PHP - Thrift / Protobuffers / PHP-
Java Bridge
Ruby - JRuby + Neo4j.rb
Python - JPython / CPython + JCC /
Neo4j.py

19. Some Examples

20. Remember It
Relationship
Node Node

21. Remember It
Relationship
Node Node
Relationship
Node Node

22. Remember It
Relationship
Node Node
Relationship
Node Node

23. Relationship - FoF - 1 level
Me
me.outgoing(:friends).depth(1)

24. Relationship - FoF - 2 level
Me
me.outgoing(:friends).depth(2)

25. Relationship - FoF - 3 level
Me
me.outgoing(:friends).depth(3)

26. Relationship - FoF - n level
me.outgoing(:friends).depth(n)

27. Filters
filter / prune
Evaluator -
INCLUDE_AND_CONTINUE
INCLUDE_AND_PRUNE
EXCLUDE_AND_DISCONTINUE
EXCLUDE_AND_CONTINUE

28. Complex Example
FoF who lives in Taipei also like Jazz
Taipei
Jazz
Me
Lives
Like
Friend

29. Complex Example
FoF who lives in Taipei also like Jazz
Taipei
Jazz
Me
Lives
Like
Friend

30. SQL
?&^@#%$@)JOIN *&@^ JOIN *@^$ JOIN &@&#
JOIN (*@#^ JOIN !&@ JOIN
Neo4j
me.outgoing(:friend).depth(:all).filter{|path_to_m|
path_to_m.end_node.outgoing(:lives).filter{|path_to_live|
path_to_live==”Taipei”
}.outgoing(:like).filter{|path_to_like|
path_to_live==”Jazz”
}
}

31. BranchSelector
preorderDepthFirst - ,
postorderDepthFirst - ,
preorderBreadthFirst - ,
postorderBreadthFirst - ,

32. Other CRUD
Batch Insertion
Range Query
Compound Query
Uniqueness
Expand
and more...

33. Caching
File Buffer Cache
Object Cache
5~10 times faster as file cache for read
Memory eater

34. Scale - 1

35. Scale - 2

36. Web-Admin
Dashboard
Console
Data Browser

37. Visual Tools
NeoClipse Flare Dracula
Arbor.js
more...

38. Other Graph DB
Dex
OrientDB
VertexDB
Pregel - Very Mystery
Allegro - Performance just fine
FlockDB - One Layer, Based on MySQL
InfiniteGraph

39. NoSQL
1
NoSQL
, , , ...

40. ,

41. ,

42. ,
Marketing
Angel Investor
Backend Engineer

43. Q & A
Blog : vonstark.co
FB : facebook.com/vonstark
Twitter : vonstark32
Contact : von@vonstark.co