I have a cluster with 3 ndbd nodes.
How many MySQLd nodes do I need. What is a good rule. One MySQLd for 3 ndbd?
How many mysqld nodes in comparison with data nodes in a mysql cluster?
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I have a cluster with 3 ndbd nodes.
How many MySQLd nodes do I need. What is a good rule. One MySQLd for 3 ndbd?
Depends on too many factors too give a short answer.
But I would put a mysqld node in each application server so application always access mysqld through localhost. It will be as easy to scale as your application is.