Our Daily Graphs written in Ruby and Neo4j

Talk given at RubyConf AR 2014 - Buenos AIres

Transcript

1. Our Daily Graphs Written in Ruby and Neo4j
2. Hola! / Oi! / Hi! • Hanneli - from Brazil • CodeMiner 42 • Coffee (coffee, coffee, coffee, coffee, coffee, coffee), Pokémon, Lego and animals <3 HIRING
3. We *WON’T* see here • Advanced graph theory • Neo4j complete guide • Java stuff (Neo4j is written in Java) • Social Networks classics example (eeeww)
4. Why graphs? In a Ruby Conference!
5. Example How does Codeminer build dev teams?
6. Example How does Codeminer build dev teams? MATCH
7. How many times have you made drawings like these?
8. Some history • Euler • Statistics • Patterns/relationship • Dependencies • Routes
9. Persistence
10. Persistence
11. Persistence One of the first CS subjects is…
12. Do you remember? Queue Stack Hash Tree Graphs
13. Persistence What’s the first storing system we study! into databases class? a. Queue b. Stack c. Hash d. Tree e. None
14. Persistence
15. Have you ever thought about it?
16. When did I notice that?
17. Hydropower modelling
18. Hydropower in Brazil
19. Wanna represent hydropower map into relational model HYDROPOWER_PLANT locale:float capacity:float name:float providing_city_id:CITY neighbor_id:HYDROPOWER_PLANT population:int
20. FUUUUUUU….
21. FUUUUUUU…. • According to population, how should I create hydropower plants neighbors? • If one plant shuts off, which one should replace it without causing damage to the entire system? • How should I avoid underuse? • Monitoring?
22. Double Fail….
23. ‘Unleraned?'
24. Look at this
25. Similar?
26. Similar?
27. Graphs oriented databases Because not all data need to live in tables
28. Neo4j
29. Our plants into graphs Itaipu! is_neighbor Itá latitude:33.43 longitude:32:33 capacity:1400 latitude:43.43 longitude:56:33 capacity:700 line_voltage:230
30. Our plants into graphs Itaipu! is_neighbor Itá latitude:33.43 longitude:32:33 capacity:1400 latitude:43.43 longitude:56:33 capacity:700 line_voltage:230 Node Relationship Attributes index
31. Visual representation Itaipu! Itá
32. Our plants into graphs Itaipu! feeds Foz do iguaçu latitude:33.43 longitude:32:33 capacity:1400 population:265000 feeds Curitiba population:1700000
33. How many people does Itaipu feed?
34. Traversal - Search Itaipu! feeds Foz do iguaçu latitude:33.43 longitude:32:33 capacity:1400 population:265000 feeds Curitiba population:1700000
35. Cypher
36. Neo4j with Ruby <3 neo4j.rb Active Record
37. Neo4j with Ruby <3 REST API Wrapper Neography
38. Neo4j - When should I not use?
39. Neo4j - When should I not use? • NoSQL Hater? • Searches - BE CAREFUL (depth x width) • Cloud • Node Monitor • Infra (backup) • Limted RAM
40. Obrigada! @hannelita hannelita@gmail.com Questions?