Okay thank you for this information. I don’t think this is clearly stated in the documentation.

Just to be clear, which files on my datanode should increase in size?

There are files named ndb_2_* in my data dir as well as files in $datadir/ndbinfo/

Thanks again.

everything is in order!

The data nodes don’t have individual files for each table and so you won’t see the table names there. What you’re seeing with the MySQL Server directories is not the files containing the contents of the tables but a copy of the data disctionary/schema definitions for those tables (e.g. if you add more rows to these tables then the files you see with the data nodes should increase in size but the ones with the MySQL Servers should not).

Regards, Andrew.

When I run the SHOW ENGINES statement, ndbcluster is set to DEFAULT.
So when I create a database and table, the table’s engine is automatically set to ndbcluster.

I’m looking at the following log files:
on sql node: /var/lib/mysql-cluster/ndb_1_cluster.log
on data nodes: $BASEDIR/data/ndb_2_out.log and ndb_3_out.log

The logs seem okay.

But I don’t see the database and table data in the datadir on the data nodes. I do see the database and table data in the datadir on the mysql node.

Is it possible there is a permissions issue? Or the my.cnf is not being read properly?

This is my data node my.cnf file:
[mysqld]
# Options for mysqld process:
ndbcluster # run NDB storage engine
ndb-connectstring=xx.xxx.xxx.xxx
basedir=/mnt/db/mysql
datadir=/mnt/db/mysql/data

[mysql_cluster]
# Options for ndbd process:
ndb-connectstring=xx.xxx.xxx.xxx

Any insight would be much appreciated!

first step – check that MySQL Cluster is enabled in the MySQL Servers – from the mysql CLI run SHOW ENGINES; and check that NDBCLUSTER is enabled.

If it is then step 2 is to make sure that you’re telling MySQL to use Cluster when you create your tables. For example…

CREATE TABLE clusterdb.simples (id INT NOT NULL PRIMARY KEY) ENGINE=NDBCLUSTER;

You can migrate an existing table using…

ALTER TABLE clusterdb.existing ENGINE=NDBCLUSTER;

Let me know how you get on.

Regards, Andrew.

My setup is 2 data nodes and 1 server with the management node and sql node, 3 servers total.

I run /etc/init.d/mysql.server start on the sql node, then log into mysql and create a db and tables, but the data files for the tables only appear in the sql node datadir. They do not appear in the data nodes’ datadir.

Any help or pointers would be appreciated!