OiReilly announced the immediate availability of Understanding MySQL Internals by Sasha Pachev on Monday. The 254 page book explains the inner workings of the open source MySQL database structure, including client and server communication protocol, configuring variables, storage engines, core server classes and structures, and more.
Sasha Pachev was a member of the MySQL development team from 2000 to 2002, and was the original developer of replication in MySQL. Understanding MySQL Internals is priced at US$49.99.