I believe that you have heard many things about NoSQL databases, but you wonder if there is any project that uses it? The answer is: YES! There is a growing number of big projects using NoSQL as main data storage or as a part of storage. I want to show you who it is and how it uses NoSQL.
Facebook.com
NoSQL database: Apache HBase (before Apache HBase, Apache Cassandra have been used).
Usage: the message system. Facebook should be able to search TeraBytes of user messages and serve them very quickly.
Twitter.com
NoSQL database: Apache Cassandra, Apache HBase.
Usage: TopTweets functionality, geographical location of users and others.
Digg.com
NoSQL database: Apache Cassandra.
Usage: main data storage.
Craigslist.org
NoSQL database: MongoDB.
Usage: Advertisements storage.
Bit.ly
NoSQL database: MongoDB.
Usage: user history.
The Mozilla Foundation: Mozilla Test Pilot Project
NoSQL database: Riak.
Usage: main data storage.
Sources:
facebook.com
engineering.twitter.com
about.digg.com
blip.tv/mongodb
craigslist.org
blog.mozilla.com
23 years old, last year Computer Science student at AGH University of Science and Technology. Interested in Java and distributed systems.