Hannu Krosing

Hannu Krosing was a PostgreSQL user before it was rewritten to use SQL as its main query language in 1995. So, he has both the historic perspective of its development and almost 20 years of experience using it for solving various real-life problems.

Hannu was the first Database Administrator and Database Architect at Skype, where he invented the sharding language PL/Proxy that allows scaling the user database to work with billions of users.

Since leaving Skype at the end of 2006—about a year after it was bought up by eBay—Hannu has been working as a PostgreSQL consultant with 2ndQuadrant, the premier PostgreSQL consultancy with global reach and local presence in most of the world.

Hannu has co-authored another Packt Publishing book, PostgreSQL 9 Administration Cookbook, together with one of the main PostgreSQL developers, Simon Riggs.

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