17.2.7.1 Upgrade and downgrade compatibility: MySQL Cluster NDB 7.x

The table shown here provides information on MySQL Cluster upgrade and downgrade compatibility among different releases of MySQL Cluster NDB 7.0 and 7.1. Additional notes about upgrades and downgrades to, from, or within the MySQL Cluster NDB 7.x release series can be found immediately following the table.

MySQL Cluster upgrade/downgrade compatibility, MySQL Cluster NDB 7.x
Notes: MySQL Cluster NDB 7.x

Versions supported.  Online upgrades from any MySQL Cluster NDB 7.0 release up to and including MySQL Cluster NDB 7.0.4 (as well as all early releases numbered NDB 6.4.x) to MySQL Cluster NDB 7.0.5 or later are not possible. Upgrades to MySQL Cluster NDB 7.0.6 or later from MySQL Cluster NDB 6.3.8 or a later MySQL Cluster NDB 6.3 release, or from MySQL Cluster NDB 7.0.5 or later, are supported. (Bug #44294)

Upgrading ndbd to ndbmtd.  When upgrading online from a MySQL Cluster NDB 6.3 release to a MySQL Cluster NDB 7.0 (or later) release, you should not try to upgrade the data nodes from ndbd to ndbmtd at the same time. Instead, perform the upgrade using the new ndbd executable (from the MySQL Cluster NDB 7.0 or later distribution to which you are upgrading) to replace the one in use on the data nodes. Once the version upgrade is complete, you can perform a second (online) upgrade to replace the data node executables with ndbmtd from the newer distribution. Changing the data node binary type should not be an issue when upgrading from MySQL Cluster NDB 7.0 or later version.

Changes in default values.  In MySQL Cluster NDB 7.0.4, the default values for a number of MySQL Cluster configuration parameters relating to memory usage and buffering changed (see http://dev.mysql.com/doc/relnotes/mysql-cluster/7.1/en/mysql-cluster-news-5-1-32-ndb-7-0-4.html, for a list of the parameters whose defaults changed). For this reason, you may encounter issues if you try to use a configuration that does not explicitly define each of these buffers (because it was developed for a previous version of MySQL Cluster), SendBufferMemory and ReceiveBufferMemory in particular.

Other known issues include the following: