MMM (Multi-Master Replication Manager for MySQL) 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. Current version 2.0 development is led by Pascal Hofmann. If you require support, advice or assistance with deployment, please contact Percona or Open Query.

• [517804] mmm_mond should log to separate log files per cluster
• [517650] auto_set_online may set flapping hosts to ONLINE
• [494128] tabs or spaces in config file causes failures
• [493895] MMM should check needed perl modules on startup
• [492571] mmm_control show indicates all-good even though mmmd_agent could not access db
• [489462] writer role can't move to the other server but reader role can(mysql-mmm-1.2.6)
• [484395] MMM2: Suggested change for default logging
• [484128] auto_set_online does not work for flapping hosts

• Bugtracker

• [trunk-2.x] r119 Determine whether ito set a flapping host to ONLINE 'cause o...
• [trunk-2.x] r118 Made debian init scripts compliant to LSB and debian policy....
• [trunk-2.x] r117 Some changes to fulfill the debian policy and the Filesystem...
• [trunk-2.x] r116 Renamed mmmd_mon and mmmd_agent - the are called mmm_agentd ...
• [trunk-2.x] r115 Fixed wrong spelling of mmm_control in documentation....
• [trunk-2.x] r114 Release 2.0.11...
• [trunk-2.x] r113 let auto_set_online set flapping hosts to ONLINE after flap_...
• [trunk-2.x] r112 Merged changes from lp:~derks/mysql-mmm/angel-infinit-failur...

• Repository of MMM 2.x