MySQL Cluster 7.3 is finalised
Foreign Keys, introduced a year ago when Cluster 7.3 was still in the labs, allows the relationship between keys within the database to be defined. Foreign key relationships can be configured via the standard CASCADE, RESTRICT, NO ACTION and SET NULL referential elements. Foreign keys can be defined and removed at runtime without the need to interrupt system operation. Further details about foreign keys are covered in a ClusterDB tutorial. MySQL Cluster is built with NDB Cluster storage engine installed within a MySQL 5.6 Server; for applications that need InnoDB or MyISAM tables, traditional MySQL servers can be slaved from the cluster nodes; these configurations can now be created with the auto-installer GUI.
MySQL Cluster is dual-licensed as commercial and free software under the GPL; the commercial version has all the features of the Enterprise Edition of MySQL. Binaries and source code are available to download and a quickstart guide is available to help with Windows, Linux and Solaris installations. Release notes can also be viewed for a detailed list of all the changes.