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Neo4j Gratabase
- 1. #neo4j Graph Database (Gratabase) Peter Ehrlich – @ehrlicp www.GoDu.it
- 2. MySQL Users Posts id name email id user_id content
- 3. MySQL Joins id name email post_id user_id content
- 4. Indexing id name email post_id user_id content 5 3 7 1 4 10
- 5. MySQL Users users_posts Posts name email id user_id post_id favorited? id content ?
- 6. The Problem
- 7. Users Following Tweets id follower_id followee_id followee_id content me me you you breakfast you you me you lolcats +e6 more +e9 more +e12 more...
- 9. Nodes You
- 10. Nodes Ramses id: ’11’ _classname: ‘User’ name: ‘Ramses III’ role: ‘Pharaoh’ START self = node(11)
- 11. Relationships You Josh Bob Sam START self = node(11) MATCH (self)-[rel]->(followee)
- 12. Relationships You Josh Bob Sam START self = node(11) MATCH (self)-[rel:following]->(followee)
- 14. Soup Pharaoh You :role :role :follow Josh Bob Sam
- 15. Activity Feeds latest tweet You older tweet older tweet older tweet START self = node(11) MATCH (self)-[rel:tweeted]->(tweet) WHERE tweet.deleted = false ORDER tweet.created_at LIMIT 10
- 16. Self-structured data You latest tweet older tweet START self = node(11) MATCH (self)-[rel:tweeted*1..10]->(tweet) WHERE tweet.deleted = false older tweet older tweet
- 17. Meta Sam Bob :follow Josh :posted Interesting Post
- 18. N-ary Relationships Sam Bob Josh Post 1 Sam Bob :notifies An Action Josh Interesting Post
- 19. Personalization
- 20. Feature Switching You :follow Josh Sam Bob Sarah Sue :use Exciting Feature
- 21. Full-text search Friends are Star relations Notifications are N-ary relations A Feed combines linked lists Likes are star relations Comments are linked lists
- 22. Resources http://www.slideshare.net/pehrlich/neo4j-gratabase @ehrlicp Neo4j Blog,Videos blog.neo4j.org, video.neo4j.org Graph Theory Book: cs.cornell.edu/home/kleinber/networks-book Cool phd things with graphs: http://www.rene-pickhardt.de Scaling twitter: http://hueniverse.com/2008/03/scaling-a-microblogging-service-part-i
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