Notes from NoSQL meetup in ATLSWC

Some notes from "Overview of NoSQL Database systems" hosted by Thoughtworks, Atlanta.

Presenter: Noah Kriegel

Starters: Awesome pizza and drinks.

Presentation gist:

• Beautiful prezi layout (check below image - Courtesy: James Brechtel).

• Most of the content is inspired from NoSQL Distilled book, but Noah did a good job in extracting the necessary stuff and supplementing it with his own experience.

Why we love RDBMS

• ACID compliant
• Standard, Expressive and Powerful SQL.

Why the hate?

•  Challenges with data replication and multi node setup resulting in expensive infrastructure.
•  Application object and db data type mismatch. Tools like ActiveRecord and Hibernate plays a major part in overcoming this but has their own pitfalls.

NoSQL movement

• Inspired by two papers on Google Big Table and Amazon DynamoDB
• Gain traction with the developers unlike failures like Object databases in the past.

Some important facts to remember

• CAP theorem
• Quorum-based voting techniques

NoSQL types

•  Key Store
• Document oriented database
• Column oriented DBMS 
• Graph databases

Each of the type was discussed on the following terms:

• Introduction and key feature
• When to use
• When not to use
• Sample code

I'll put some more details on each of these data types in the upcoming posts.

Some key TIL:

• CQL closely mirrors SQL in its syntax.
• Redis stands for REmote DIctionary Server.
• Mongo is a strip-off from the word - humongous