Re: Mysqld Start failed. * 22: Error * The process has wrong type. Expected a DB process.: Permanent error: Application error

[Jonathan Stephens]

Hi Timothy, that's not how you start an SQL node. START in the ndb_mgm client works only with data nodes.

To start a MySQL server with the NDB support enabled, start it with the --ndbcluster option. To tell it which cluster it needs to join, start it with the --ndb-connectstring option also.

The cluster must be running first, of course. Then you can start the SQL node from your system shell like this:

mysqld_safe --ndbcluster --ndb-connectstring=192.168.168.187 &

Or put the options in a configuration file that's read by mysqld.

Hope this helps.

Jon Stephens
MySQL Documentation Team @ Oracle

MySQL Dev Zone
MySQL Server Documentation
Oracle