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 are expected already to be familiar with installing and configuring an NDB Cluster prior to attempting an upgrade or downgrade. See Section 18.3, “Configuration of NDB Cluster”.

For 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, NDB Cluster 7.4

Image is titled "MySQL NDB Cluster 7.4" and includes rows with the values "7.4.17" on top and "7.4.1" at the bottom with every 7.4.x cluster release in-between. To the left are arrows pointing up and down. Under this section is an area titled "Key" that explains the up and down arrow as "Online upgrades and downgrades possible". Image indicates that v7.4.9 was either not released, or withdrawn following release. The top value, "7.4.17" today, represents the latest release today but this text might not be updated.

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, NDB Cluster 7.3

Content is described in the surrounding text.

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