About the Authors
Usama Dar is a seasoned software developer and architect. During his 14 years'
career, he has worked extensively with PostgreSQL and other database technologies.
He worked on PostgreSQL internals extensively while he was working for
EnterpriseDB. Currently, he lives in Munich where he works for Huawei's European
Research Center. He designs the next generation of high-performance database
systems based on open source technologies, such as PostgreSQL, which are used
under high workloads and strict performance requirements.
Hannu Krosing was a PostgreSQL user before it was rewritten to use SQL as its
main query language in 1995. Therefore, he has both the historic perspective of its
development, as well as almost 20 years of experience in using it to solve various
real-life problems.
He was the rst database administrator and database architect at Skype, where he
invented the sharding language PL/Proxy that allows you to scale the user database
in order to work with billions of users.
After he left Skype at the end of 2006—about a year after it was bought by
eBay—he has been working as a PostgreSQL consultant with 2ndQuadrant, the
premier PostgreSQL consultancy with a global reach and local presence in most
parts of the world.
He has coauthored PostgreSQL 9 Administration Cookbook, Packt Publishing, together
with one of the main PostgreSQL developers, Simon Riggs.
I want to sincerely thank my wife, Evelyn, for her support while
writing this book.
