John has 40 of years experience working with data. Data in files and in Databases from flat files through ISAM to relational databases and, most recently, NoSQL. For the last 15 year he's worked on a variety of Open source technologies including MySQL, PostgreSQL, Cassandra, Riak, Hadoop, and Hbase. As a Chief Database Architect at AOL he brought MySQL in to replace Sybase and has worked hands on with MySQL databases holding hundreds of billions of rows and running millions of transactions per second. For the last three years he has been working for Pythian to help their customers improve their existing databases and select new ones for new applications.