Introduction

MMM (MySQL Master-Master Replication Manager) is a set of flexible scripts to perform monitoring/failover and management of MySQL Master-Master replication configurations (with only one node writable at any time). The toolset also has the ability to read balance standard master/slave configurations with any number of slaves, so you can use it to move virtual IP addresses around a group of servers depending on whether they are behind in replication.

The current version of this software is stable, but the authors would appreciate any comments, suggestions, bug reports about this version to make it even better.

Note the downloadable version of the software has several bugs which are fixed in SVN trunk. We recommend using the trunk code until we have a chance to release a new tarball.

Links

Documentation for this project can be found on the author's site or in local wiki DocumentationContents section:

• MySQL Master-Master Replication Manager
• Installation Instructions
• Typical use-cases of mmm-deployment
• Master-master replication example
• Articles:
• Master-master replication example
• Using MMM to Alter Huge Tables

Consulting and Sponsorship

If your company needs any help with this software deployment, configuration or troubleshooting, or you need us to add some specific features for you (like support of some new platform), we can help you. More information about our consulting services can be found here.