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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.
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Dal modello Relazionale al Grafo: cosa cambia?
Alfonso Focareta
[email protected] – Pro-Netics S.p.A. – NuvolaBase ltdTwitter : @afocareta
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RDBMS Features
• Born in 1970• Slow• Commonly used• Support SQL language
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Graph Database (Property Graph)
Graph = (Vertex,Edge)
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Graph
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Graph
An object that contains vertices and edges.
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Vertex
An object that is connected to other objects by edges.
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Edge
An object that connects two vertices.
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Graph “Real” example
Love Love
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Graph “Real Example” 2
Love Love
Know
Know Know
Sell
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Property Graph
• Key/value-based• Directed• multi-relational
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2012:The year of Graph (blogs.forrester.com)
• social media analytics• marketing campaign optimization• customer experience fine-tuning
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GraphDb list
• OrientDB• Neo4j• Dex• GiraffeDB
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Document-Graph database with the support of ACID Transactions, SQL and Native Queries, Asynchronous Commands, Intents.
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OrientDb - Fast
150.000 documents per second
10 billions of documents per day
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OrientDB – Transactional
Supports ACID Transaction:• Atomicity• Consistency• Isolation• Durability
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OrientDB – SQL
Supports SQL language with extensions to handle relationships without JOINs, manage trees and graphs of connected documents
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OrientDB – Web Ready
• HTTP• RESTful • JSON
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OrientDb - Ø config
download, unzip, run!
cut & paste the db
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OrientDB – Portability
• Runs everywhere is available Java® JRE1.5+• Driver in JAVA, Javascript, C, Php, Ruby, .NET, Python …
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OrientDb – Hooks
similar to triggers catch events against records, database and transactions implement custom cascade deletion algorithm
enforce constraints
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OrientDB - Free
FREE for any use : Open Source License Apache 2.0
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Example
Classical Business domain : Billing
Objects: • Bill• Customer• Vendor• Products
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Example Domain
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OrientDB – Create vertexODocument product = database.createVertex();vertex.field(”id", ”1");vertex.field(”price", 10000);
Vertex.field(“vat type”,10)vertex.save();
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OrientDB create EdgeODocument 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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OrientDB – remove Edge / delete Vertex
database.removeEdge( edge )
database.removeVertex( vertex )
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Demo
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ThinkerPopproposes standards for the world of GraphDB through the development of open source projects
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ThinkerPop - BlueprintsBlueprints 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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BluePrints - ExampleGraph 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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ThinkerPop - GremlinGremlin is a graph traversal language used for graph query, analysis, and manipulation.
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Gremlin - Example
TBD
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NuvolaBase
Create your GraphDatabase on the cloud in 1 minute.
www.nuvolabase.com
Dal modello Relazionale al Grafo: cosa cambia?
Alfonso Focareta
[email protected] Pro-Netics S.p.A. - Team Leader/Senior DeveloperNuvolaBase Ltd – Software EngineerTwitter : @afocareta
