P. R. Karthik started his career as a MySQL DBA. Currently, he is working as a Senior MySQL DBA in Yahoo. They are managing one of the biggest MySQL farms in the world.
Daniel Parnell lives in Melbourne, Australia. He started messing around with computers when he was very young. His first computer was an AIM65 with a 4 K of RAM, BASIC and Forth in ROM, and no storage. From there, he tinkered with various home computers ranging from the Apple II to the Commodore Amiga. These days Daniel works on web and desktop apps. When Daniel is not programming or tinkering with his latest hardware project, he is spending time with his wife and two children.
Stephane Varoqui is a senior MariaDB and MySQL consultant at SkySQL. He is based in Paris. Before joining SkySQL in 2011, he worked at MySQL/Sun/Oracle as a lead MySQL consultant in the Europe/Middle East/Africa (EMEA) region for six years.