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Graph�� Databases�� -�� How�� does�� it�� work?

Pernilla�� Lindh

1måndag 15 juli 13intro me


About Me

2måndag 15 juli 13


About Me

Geek Girl Meetup Öresund, Sweden

2måndag 15 juli 13


About Me

Developer Evangelist Geek Girl Meetup Öresund, Sweden

2måndag 15 juli 13


About Me

Developer Evangelist Started at Neo4j 2012


2måndag 15 juli 13


About Me

Developer Evangelist Started at Neo4j 2012My Blog: www.p3rnilla.com


2måndag 15 juli 13


About Me

Developer Evangelist Started at Neo4j 2012My Blog: www.p3rnilla.comFind me on Twitter: @p3rnilla


2måndag 15 juli 13


About Me

Developer Evangelist Started at Neo4j 2012My Blog: www.p3rnilla.comFind me on Twitter: @p3rnillaEmail me: [email protected]


2måndag 15 juli 13

mailto:[email protected]


(Big)DataNOSQLWhat is a Graph Database, Not?What is a Graph, then?What is a Graph Database?What is Neo4j?

AGENDA

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http://nostarch.com/mg_databases.htm#reviews

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http://nostarch.com/mg_databases.htm#reviews

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Formally, the term "database" refers to the data itself and supporting data structures. Databases are created to operate large quantities of information by inputting, storing, retrieving, and managing that information.

Databases are set up, so that one set of software programs provides all users with access to all the data.(http://en.wikipedia.org/wiki/Database)

Databases are created to operate large quantities of information by inputting, storing, retrieving, and managing that information.


inputting

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inputtingstoring

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inputtingstoringretrieving

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inputtingstoringretrievingmanaging information

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DATA???

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Computer data is information processed or stored by a computer. This information may be in the form of text documents, images, audio clips, software programs, or other types of data. Computer data may be processed by the computer's CPU and is stored in files and folders on the computer's hard disk. http://www.techterms.com/definition/data


























Data?


So Data is getting bigger as you can see here we are sending 20 million email every second.....

recognize this one? Eric Schmidt Executive Chairman of google, he made a nice quote about big data


Data?





Data?





Data?





Data?





Data?





Data?





Data?

Every 2 days we create as much

information as we did up to 2003.”-Eric Schmidt,

Google







?



? BIG DATA



?

=

BIG DATA



?

=

BIG DATA

NOSQL







A Swedish Smorgasbord filled with different types of databases





SQL



SQL Structured Query Language



SQL Relational Database (MySQL)

Structured Query Language





Relational



Relational



Relational

People



Relational

People Cats



Relational

People CatsPeople_Cats



Relational




Relational




Relational



NOSQL (Not Only SQL)

non-relational

open-source (mostly)

cluster-friendly

21st Centery Web

schema optional

18måndag 15 juli 13charachterictics for a nosql database


NOSQL family

19måndag 15 juli 13The difference between these databases is the so called datamodel the building blocks that they exposed to the developers

Building blocks for Mongo Db are document in Column Oriented database like Cassandra it’s columnsthe keyvalue stores are key and value

column based on bigtables -


NOSQL family





NOSQL familyFour types of NOSQL databases





NOSQL family

Document-Oriented Database

Four types of NOSQL databases





NOSQL family







NOSQL family


Column Oriented






NOSQL family


Column Oriented






NOSQL family


Column Oriented

Key Value Stores






NOSQL family


Column Oriented

Key Value Stores






NOSQL family


Column Oriented

Key Value Stores






NOSQL family


Column Oriented

Key Value Stores

Graph Database






NOSQL family


Column Oriented

Key Value Stores

Graph Database






So,�� graphs...





22måndag 15 juli 13marshall ”how I meet your mother”


23måndag 15 juli 13what do google say?








So,�� graphs...





What is a graph?



Object (vertex, node)

What is a graph?




What is a graph?




Link (edge, arc, relationship)

What is a graph?




Link (edge, arc, relationship)

What is a graph?



Different Kinds of Graphs

Undirected Graph

Directed Graph

Hyper Graph



More Kinds Of Graphs



Graph�� databases�� you�� might�� heard�� about





Most well known graph















So,�� graphs...





what�� are�� they�� good�� at?��



Highly connected data (social networks)












Recommendations (e-commerce)



Path Finding (how do I know you?)









Shortest Path (from a -> b)



Shortest Path (from a -> b)



35måndag 15 juli 13a graphdatavase with an ecxlpit graph structure, each node knows its adjacent nodes as the number of nodes increases the cost of a local step or hop remains the same plus an index for lookups


So what is a Graph Database?











Compered to Relational Database...



Compered to Relational Database...



What is Neo4j?



What is Neo4j?





- Property Graph



- Property Graph

- Full ACID (atomicity, consistency, isolation, durability)



- Property Graph




- Property Graph

- Full ACID (atomicity, consistency, isolation, durability) Not many NOSQL databases

have ACID except Neo4j...



- Property Graph





- Property Graph





- High Availability (with Enterprise Edition)

- Property Graph





- Embedded Server


- Property Graph





- Embedded Server


- Property Graph


- REST API

Not many NOSQL databases have ACID except Neo4j...



Modeling the data



What do we need


What do we needPeople

Space Crew

Land Crew

Supply Maps/Navigation System

Time schedule

Spacecraft

$$Money

Astronauts

EngineersManagers

Doctors

operative personal

Admin personal

foodwater Test, test ,testWC

space suits

communication tools

documentation

Mars

Earth

stars

training

fuelSystem

Salaries

clothes

training program

<6 months - from Earth> mars

more research

mars rover

planning

prep timerecovering time Summary

sponsors

smart people




to

participate_in

fly


to

participate_in

fly

control

works_

in

look_after

look_after


to

participate_in

fly

control

works_

in

works_at

look_after

look_after

works_atworks_at

part_o

fMars

Mission_To_Mars

Astronaut Pernilla

Spaceship

control_tower

Admin

StinaManager

Lisa

Doctor

MichaelaNASA

Headquarter


to

participate_in

fly

control

works_

in

works_at

look_after

look_after

works_atworks_at

part_o

fMars

Mission_To_Mars

Astronaut Pernilla

Spaceship

control_tower

Admin

StinaManager

Lisa

Doctor

MichaelaNASA

Headquarter


to

participate_in

fly

control

works_

in

works_at

look_after

look_after

works_atworks_at

part_o

fMars

Mission_To_Mars

Astronaut Pernilla

Spaceship

control_tower

Admin

StinaManager

Lisa

Doctor

MichaelaNASA

Headquarter


A graph database =

Nodes and relationships

Nodes RelationshipsMars

Pernilla AstronautAnna Manager

Michaela DoctorLisa Admin

Stina Engineer

Supply

SpaceshipNASA

Control Tower

Mission_to_Mars

Money

goes_into

built

designfly

works_in

look_after

works_at

participate_in

to

manage

pay_mission



Cypher - a graph query language

๏ a pattern-matching query language

๏ declarative grammar with clauses (like SQL)

๏ aggregation, ordering, limits

๏ create, read, update, delete, match



// create a nodecreate (astronaut:Astronaut {name:"Pernilla", age: 27}),(target:Planet {planet:"Mars"}),

(mission:Mission {mission:"Mission to Mars"});// find nodes match to node 1,2,3MATCH (astronaut)-[:PARTICIPATES_IN]->(mission)-[:TO]->(Planet:planet) where planet.planet = "Mars" RETURN astronaut.name


// create a nodecreate (astronaut:Astronaut {name:"Pernilla", age: 27}),(target:Planet {planet:"Mars"}),

(mission:Mission {mission:"Mission to Mars"});// find nodes match to node 1,2,3MATCH (astronaut)-[:PARTICIPATES_IN]->(mission)-[:TO]->(Planet:planet) where planet.planet = "Mars" RETURN astronaut.name


Demohttp://gist.neo4j.org/?5999059


THANKS!

Questions?
