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NoSQL

The Lightning Way

XIV Encontro da comunidade SQLPortLX 2011.08.16

Why should we care?

When all you have is a hammer, you tend to see every problem as a nail.

Abraham Maslow

What is NoSQL?

• “Next Generation Databases mostly addressing some of the points: being non-relational, distributed, open-source and horizontally scalable. (…)”

from nosql-databases.org

Ok, what does it means?

• Non-relational AKA “Structured Storage”• No fixed Table Schemas• No (or minimal) JOIN operations• Usually low-level record-at-a-time instead

of SQL clauses• Scale horizontally

Why NoSQL?

• “Most” modern applications are web-based• As such, must be able to scale out by

simply adding commodity servers • NoSQL DBMS are built to be able to scale

out• No fixed schema provides flexibility of

design and development – no “schema written in stone syndrome”

NoSQL DBMS vs. RDBMS

• RDBS are mostly all about ACID• Atomicity, Consistency, Isolation, Durability

• NoSQL are mostly BASE• Basically Available, Soft state, Eventual

consistency

So, BASE is….

• It’s like a teenager:– Always Basically Available (open to new

relationships)– in a Soft state (none of the relationships last

very long) – and Eventually consistent (one day

he/she will get a girlfriend/boyfriend and eventually get married).

NoSQL Logical Model

• Key Value– Amazon Dynamo, Voldemort, Dynomite,

Azure Table Storage

• Document Oriented– Couch DB, MongoDB

NoSQL Logical Model

• Wide Column Store – Google BigTable, HBase

• Graph– Twitter’s FlockDB, Neo4J

Communalities

• Loosely typed extensible data schema

• Consistency gives place to scalability and availability

• Designed for horizontal scaling through data distribution model across multiple nodes

• Support various 'Non-SQL' interfaces (REST, Get/Put, API,etc.)

NoSQL cheat-sheet AKA References

• NoSQL - Your Ultimate Guide to the Non - Relational Universe• http://nosql-database.org/

• NoSQL in the Enterprise• http://www.infoq.com/articles/nosql-in-the-enterprise

• Whitepaper on NoSQL and the Windows Azure Platform• http://blogs.msdn.com/b/sqlazure/archive/2011/05/04/10160671.aspx

• NoSQL Ecosystem• http://www.rackspace.com/cloud/blog/2009/11/09/nosql-ecosystem/

• Why NoSQL?• http://www.couchbase.com/why-nosql/nosql-database

• BASE: An Acid Alternative• http://queue.acm.org/detail.cfm?id=1394128

Q&A Time…

Thank you for your patience!

How to find me… if you care to know!(really? don’t you have anything better to do?)

Twitter: @pjtmatos

e-mail: mail@paulomatos.com