On Wed, Dec 15, 2010 at 3:18 PM, Michael Muraguri <mickie.mic@gmail.com>wrote:
Are you sure Makobu about Facebook? I think they've been using Cassandra @ least for thier Messaging and then moved to HBase. These two scale way more than you can with RDBMs. Others who use such DBs include LinkedIn, Amazon, Google and many others.
Facebook uses both, and more. " *Upgrading to HBase saved Facebook from having to completely replace its application servers that run databases: Apache Cassandra, which Facebook developed and made available to the open source community in 2008, handles in-box searches. MySQL houses core data such as log-ins. But both have limits in scalability and performance, said Muthukkaruppan:* *MySQL proved to not handle the long tail of data well; as indexes and data sets grew large, performance suffered. We found Cassandra’s eventual consistency model to be a difficult pattern to reconcile for our new Messages infrastructure.* * * " Source: http://www.allfacebook.com/new-technology-behind-20-billion-daily-facebook-m... and http://royal.pingdom.com/2010/06/18/the-software-behind-facebook/