Leonid Nossov was born in Yakutsk, studied mathematics in USSR and has worked in Germany as an Oracle spezialist for several software companies. In the last few years he has been in Advanced Customer Support at Oracle Germany. His work mainly involves performance tuning and troubleshooting. Hanno Ernst comes from Zschopau in the Erz Mountains. Since qualifying as an electronics technician in communications technology at German Telecom he has been in Bamberg at the German Telecom subsidiary T-Systems. His main task is database administration and he is particularly interested in error and performance analysis. Victor Chupis was born in Odessa, USSR. He studied electronics and information technology in Moscow. Since 2001 he has been working for Vodafone Germany. His special fields are database design, operations and performance tuning.