How does MySQL Cluster Manager impact previous approaches to managing MySQL Cluster?
When using MySQL Cluster Manager to manage a MySQL Cluster deployment, the administrator no longer edits the configuration files (for example config.ini and my.cnf); instead, these files are created and maintained by the agents. In fact, if those files are manually edited, the changes will be overwritten by the configuration information which is held within the agents. All processes making up the MySQL Cluster deployment are started, restarted and stopped by MySQL Cluster Manager. This includes the data nodes, management nodes and MySQL Server nodes. Similarly when using MySQL Cluster Manager, management actions must not be performed by the administrator using the ndb_mgm command (which directly connects to the management node meaning that the agents themselves would not have visibility of any operations performed with it).
