Proximo is a pure Perl implementation of a proxy for MySQL. Based on the architecture of the Perlbal project but sits between MySQL clients and servers instead of HTTP.

Built in functionality provides the ability for applications to use database clusters (master/slave, master/master, etc) without the application natively understanding how to use this functionality. Read/write splitting, query modifications, profiling, etc.

Being it's all built in Perl, it has great introspection, plugin support, and the like. Of course, that means it's also not incredibly fast (yet), but hopefully we'll get there.

For the moment, this project is very alpha. It works and has been tested in a few different circumstances, but it has some known issues and unimplemented functionality.