MySQL 5.6 Reference Manual Including MySQL NDB Cluster 7.3-7.4 Reference Guide

18.2.8 Upgrading and Downgrading NDB Cluster

This section provides information about NDB Cluster software and table file compatibility between different NDB Cluster 7.3 releases with regard to performing upgrades and downgrades as well as compatibility matrices and notes. You should already be familiar with installing and configuring NDB Cluster prior to attempting an upgrade or downgrade. See Section 18.3, “Configuration of NDB Cluster”.

Schema operations, including SQL DDL statements, cannot be performed while any data nodes are restarting, and thus during an online upgrade or downgrade of the cluster. For other information regarding the rolling restart procedure used to perform an online upgrade, see Section 18.5.5, “Performing a Rolling Restart of an NDB Cluster”.

Important

Only compatibility between MySQL versions with regard to NDBCLUSTER is taken into account in this section, and there are likely other issues to be considered. As with any other MySQL software upgrade or downgrade, you are strongly encouraged to review the relevant portions of the MySQL Manual for the MySQL versions from which and to which you intend to migrate, before attempting an upgrade or downgrade of the NDB Cluster software. See Section 2.11, “Upgrading MySQL”.

The tables shown here provide information on NDB Cluster upgrade and downgrade compatibility among different releases of NDB Cluster 7.3 and of NDB Cluster 7.4, respectively. Additional notes about upgrades and downgrades to, from, or within the NDB Cluster 7.3 and NDB Cluster 7.4 release series can be found following the tables.

Upgrades and Downgrades, NDB Cluster 7.4

Figure 18.16 NDB Cluster Upgrade and Downgrade Compatibility, MySQL NDB Cluster 7.4

Graphical representation of the upgrade/downgrade matrix contained in the file storage/ndb/src/common/util/version.cpp from the NDB 7.4 source tree.

Version support.  The following versions of NDB Cluster are supported for upgrades to NDB Cluster 7.4 (7.4.4 and later):

NDB 7.4.10 Replacement Release.  Shortly after the release of NDB 7.4.9, a regression was discovered that adversely affected node and system restarts (Bug #22582233). This issue was known to affect NDB 7.4.8 as well. NDB 7.4.10—incorporating a fix for this regression, but otherwise identical to NDB 7.4.9—was released shortly thereafter as a replacement. Users of the NDB 7.4 series are advised to bypass the 7.4.8 and 7.4.9 releases and to upgrade directly to NDB 7.4.10 (or later).

Known Issues—NDB 7.4

Upgrades and Downgrades, NDB Cluster 7.3

Figure 18.17 NDB Cluster Upgrade and Downgrade Compatibility, MySQL NDB Cluster 7.3

Graphical representation of the upgrade/downgrade matrix contained in the file storage/ndb/src/common/util/version.cpp from the NDB 7.3 source tree.

Version support.  The following versions of NDB Cluster are supported for upgrades to NDB Cluster 7.3 (7.3.2 and later):

Known Issues—NDB 7.3

For information about upgrades and downgrades in previous NDB Cluster release series, see http://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-upgrade-downgrade-compatibility-6.x.html, http://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-upgrade-downgrade-compatibility-7.x.html, and Upgrading and Downgrading NDB Cluster