NoSQL Tutorial. Some months ago I had a discussion with NoSQL creator, Carlo Strozzi, regarding the databases.
I should admit, I am an SQL fan! It's hot having the same language, no matter which platform or database engine is used. He underlined the fact that most SQL engines lack of flexibility and waste system resources (memory and disk space) because of their multi-platform environment (such as Oracle, DB2, Informix, etc.). He suggested I have a look at the white paper that inspired him: “The UNIX Shell As a Fourth Generation Language” by Evan Schaffer (firstname.lastname@example.org) and Mike Wolf (email@example.com).
Quoting from the above paper: Open Source NoSQL Databases. Java development 2.0: NoSQL. Relational databases have ruled data storage for more than 30 years, but the growing popularity of schemaless (or NoSQL) databases suggests that change is underway.
While the RDBMS provides a rock-solid foundation for storing data in traditional client-server architectures, it doesn't easily (or cheaply) scale to multiple nodes. In the era of highly scalable Web apps like Facebook and Twitter, that's a very unfortunate weakness to have.