18.1.4 MySQL Cluster Development History MySQL Cluster Development in MySQL Cluster NDB 7.2

In this section, we discuss changes in the implementation of MySQL Cluster in MySQL MySQL Cluster NDB 7.2, as compared to MySQL Cluster NDB 7.1 and earlier releases. Changes and features most likely to be of interest are shown in the following table:

MySQL Cluster NDB 7.2
MySQL Cluster NDB 7.2.1 and later MySQL Cluster NDB 7.2 releases are based on MySQL 5.5. For more information about new features in MySQL Server 5.5, see Section 1.4, “What Is New in MySQL 5.5”.
Version 2 binary log row events, to provide support for improvements in MySQL Cluster Replication conflict detection (see next item). A given mysqld can be made to use Version 1 or Version 2 binary logging row events with the --log-bin-use-v1-row-events option.
Two new primary wins conflict detection and resolution functions NDB$EPOCH() and NDB$EPOCH_TRANS() for use in replication setups with 2 MySQL Clusters. For more information, see Section 18.6, “MySQL Cluster Replication”.
Distribution of MySQL users and privileges across MySQL Cluster SQL nodes is now supported—see Section 18.5.14, “Distributed MySQL Privileges for MySQL Cluster”.
Improved support for distributed pushed-down joins, which greatly improve performance for many joins that can be executed in parallel on the data nodes.
Default values for a number of data node configuration parameters such as HeartbeatIntervalDbDb and ArbitrationTimeout have been improved.
Support for the Memcache API using the loadable ndbmemcache storage engine. See ndbmemcache—Memcache API for MySQL Cluster.

This section contains information about MySQL Cluster NDB 7.2 releases through 5.5.47-ndb-7.2.24, which is currently available for use in production beginning with MySQL Cluster NDB 7.2.4. MySQL Cluster NDB 7.1, MySQL Cluster NDB 7.0, and MySQL Cluster NDB 6.3 are previous GA release series; although these are still supported, we recommend that new deployments use MySQL Cluster NDB 7.2. For information about MySQL Cluster NDB 7.1 and previous releases, see MySQL Cluster NDB 6.1 - 7.1, in the MySQL 5.1 Manual.