Cassandra

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A firestorm of accusations circled around recently saying that Cassandra, the elected-by-major-adopters emperor of the NoSQL movement, has no clothes. http://highscalability.com/blog/2010/7/11/so-why-is-twitter-really-not-using-cassandra-to-store-tweets.html

So, Why is Twitter Really Not Using Cassandra to Store Tweets?

In the past year, we've been working with the Apache Cassandra open source distributed database. http://engineering.twitter.com/2010/07/cassandra-at-twitter-today.html

The Twitter Engineering Blog: Cassandra at Twitter Today

http://gigaom.com/2010/07/12/nosql-pioneers-are-driving-the-webs-manifest-destiny/

NoSQL Pioneers Are Driving the Web’s Manifest Destiny

Twitter has scaled back its plans to store billions of tweets using Cassandra, a non-relational database project that Facebook created and open sourced.