Secondo le previsioni il 2012 sarà l'anno dei GraphDB. Cosa sono e come possono essere utilizzati in applicazioni Enterprise? Questo talk prenderà in esame i GraphDB, come sono fatti, cosa c'è di diverso rispetto ai DBMS Relazionali, pro e contro, quali standard esistono e sopratutto come mappare un classico dominio Enterprise con un grafo.

1. Dal modello Relazionale al Grafo: cosa cambia?
Alfonso Focareta
Alfonso.focareta@gmail.com – Pro-Netics S.p.A. – NuvolaBase ltd
Twitter : @afocareta

2. RDBMS Features
• Born in 1970
• Slow
• Commonly used
• Support SQL language
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3. Graph Database (Property Graph)
Graph = (Vertex,Edge)
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4. Graph
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5. Graph
An object that contains vertices and edges.
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6. Vertex
An object that is connected to other objects by edges.
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7. Edge
An object that connects two vertices.
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8. Graph “Real” example
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9. Graph “Real Example” 2
Sell
Know
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10. Property Graph
• Key/value-based
• Directed
• multi-relational
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11. 2012:The year of Graph (blogs.forrester.com)
• social media analytics
• marketing campaign optimization
• customer experience fine-tuning
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12. GraphDb list
• OrientDB
• Neo4j
• Dex
• GiraffeDB
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13. Document-Graph database with the support of ACID
Transactions, SQL and Native Queries, Asynchronous
Commands, Intents.
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14. OrientDb - Fast
150.000 documents per second
10 billions of documents per day
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15. OrientDB – Transactional
Supports ACID Transaction:
• Atomicity
• Consistency
• Isolation
• Durability
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16. OrientDB – SQL
Supports SQL language with extensions to handle relationships
without JOINs, manage trees and graphs of connected
documents
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17. OrientDB – Web Ready
• HTTP
• RESTful
• JSON
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18. OrientDb - Ø config
download, unzip, run!
cut & paste the db
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19. OrientDB – Portability
• Runs everywhere is available Java® JRE1.5+
• Driver in JAVA, Javascript, C, Php, Ruby, .NET, Python …
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20. OrientDb – Hooks
similar to triggers catch events against records, database and
transactions implement custom cascade deletion algorithm
enforce constraints
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21. OrientDB - Free
FREE for any use : Open Source License Apache 2.0
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22. Example
Classical Business domain : Billing
Objects:
• Bill
• Customer
• Vendor
• Products
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23. Example Domain
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24. OrientDB – Create vertex
ODocument product = database.createVertex();
vertex.field(”id", ”1");
vertex.field(”price", 10000);
Vertex.field(“vat type”,10)
vertex.save();
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25. OrientDB create Edge
ODocument product= database.createVertex();
vertex.field(”id", ”1");
vertex.field(”price", 10000);
Vertex.field(“vat type”,10)
ODocument bill = database.createVertex();
vertex2.field(”id", ”1");
ODocument edge = database.createEdge( product, bill);
edge.field(”number", ”20");
edge.save();
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26. OrientDB – remove Edge / delete Vertex
database.removeEdge( edge )
database.removeVertex( vertex )
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27. Demo
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28. ThinkerPop
proposes standards for the world of GraphDB through the
development of open source projects
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29. ThinkerPop - Blueprints
Blueprints is a collection of interfaces, implementations,
ouplementations, and test suites for the property graph data
model.
Blueprints is analogous to the JDBC, but for graph databases.
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30. BluePrints - Example
Graph graph = new OrientGraph("/tmp/my_graph");
Vertex a = graph.addVertex(null);
Vertex b = graph.addVertex(null);
a.setProperty("name","marko");
b.setProperty("name","peter");
Edge e = graph.addEdge(null, a, b, "knows");
e.setProperty("since", 2006);
graph.shutdown();
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31. ThinkerPop - Gremlin
Gremlin is a graph traversal language used for graph query,
analysis, and manipulation.
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32. Gremlin - Example
TBD
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33. NuvolaBase
Create your GraphDatabase on the cloud in 1 minute.
www.nuvolabase.com
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34. Dal modello Relazionale al Grafo: cosa cambia?
Alfonso Focareta
alfonso.focareta@gmail.com
Pro-Netics S.p.A. - Team Leader/Senior Developer
NuvolaBase Ltd – Software Engineer
Twitter : @afocareta