MMM 1.x

MMM (MySQL Master-Master Replication Manager) is set of flexible scripts to perform monitoring and management of MySQL Masrter-Master replication cluster configurations.

Generally, MMM offers MySQL monitoring and automatic failover for master-master pairs, it also has scripts for data backups, resynchronization between nodes etc.

In two node master-master setup, MMM uses five IPs: single permanent IP for each node that is never changed, 2 _reader_ IPs (read-only) and 1 _writer_ IP (updates). Last three IPs are migrating between the nodes depending on node availability.

Normally (no replication failures, no replication delay etc) active master has 2 IPs (reader and writer), standby master - 1 IP (reader). In case of a failure, both - writer and reader roles migrate to the working node.

• Typical Use Cases of MMM Deployment - Where could I user MMM?
• Installation - Generic installation-related questions
• configuration-files - Configuration files-related information
• Configuration examples - Examples of simple and pretty complex configuration schemes
• How to use - Very basic how-to commands
• troubleshooting - Problems solving
• Internals - Generic MMM internals information
• FAQ - Questions and Answers about MMM
• TODO - Our development plans and roadmap