For Sun Microsystems, the acquisition of open-source database vendor MySQL is a positive step, giving Sun its own database and a growing, loyal community of open-source users and developers to add to its portfolio. So what's the upside or downside for the MySQL community itself?

French ERP (enterprise resource planning) vendor Nexedi made a public bid Monday to take over stewardship of the open-source MySQL database from Sun Microsystems, offering a symbolic €1 in return.

One way for open source vendors to respond is through proprietary features. News that Amazon Relational Database Service (RDS) provides a MySQL 5.1 relational database in the cloud has met with a lot of interest. On the surface, this is good news for open source users and proponents.

According to a post on the MySQL blog site last night, by MySQL's Vice President for Community Kaj Arno, Sun Microsystems plans to purchase MySQL AB, the commercial firm selling enterprise database products built atop the ubiquitous open source database which represents the M in the LAMP open source software stack.

Novell partners with database vendor Ingres to make it easier to build and deploy software appliances -- but what about MySQL?

Mickos [Mårten] was recruited to lead open-source database provider MySQL AB in 2001 by chief technology officer and co-founder Michael “Monty” Widenius, a college classmate. Since then, the MySQL database has become one of the most popular open-source technologies around, used by many of the biggest Web 2.0 sites.

MySQL is a relational database management system. It provides a very fast, multi-threaded, multi-user, and robust SQL (Structured Query Language) database server. MySQL is the most popular open source database, and is the database component of the LAMP software stack. LAMP consists of the Apache web server, MySQL and PHP, the essential building blocks to run a general purpose web server.

There were new metrics out this week for both EnterpriseDB's PostgreSQL-centric database business, and Sun Microsystems' MySQL business. These players are at the forefront of challenging pricing for databases and surrounding services from competitors such as Oracle, and both are having strong success with strategies focused on open source databases.

Roughly a year ago, MySQL stood near the top of The VAR Guy’s Open Source 50 — which tracks the world’s most promising open source partner programs. Fast forward to the present and MySQL’s ownership remains in doubt. The reason: The European Union continues to scrutinize Oracle’s planned takeover of Sun and MySQL. For MySQL channel partners and ISVs what does the future hold?