Release Notes#

#v4.4.0

#New and Optimized Features

#MySQL 8.4 Support

MySQL-MGR clusters can now run MySQL 8.4, the latest long-term-support release (shipped with MySQL 8.4.8). New instances can be created directly on 8.4, and the parameter templates, monitoring, backup/restore, and router routing are all adapted to the 8.4 server. MySQL-MGR continues to support the single-primary and multi-primary Group Replication topologies on 8.4.

#In-Place Upgrade from MySQL 8.0 to 8.4

You can now upgrade an existing MySQL 8.0 MGR cluster in place to MySQL 8.4 without rebuilding the cluster or migrating data. The operator performs a rolling, member-by-member upgrade that:

• preserves all data and the existing Group Replication membership;
• upgrades the InnoDB Cluster metadata schema automatically;
• keeps the cluster serving traffic through MySQL Router during the rolling restart;
• reconciles members that are not yet in a safe replication-consistency state before proceeding, so the upgrade is safe even from a mixed starting state.

The upgrade is triggered through the standard version-upgrade flow on the instance. See Upgrade MySQL 8.0 to 8.4 for prerequisites and the full procedure.

#Fixed Issues

No issues in this release.

#Known Issues

No issues in this release.