MySQL Cluster Tutorial - cdn.oreillystatic.com

The Switch
We now have to tell the Slave MySQL Server it has to use the other MySQL server of the
Master to read changes from. We have to find out what was the last ‘epoch’ or event from
the Master that it applied. You do this with the following query:
mysql_Slave> SELECT MAX(epoch) FROM mysql.ndb_apply_status;
+---------------+
| MAX(epoch) |
+---------------+
| 1915555414023 |
+---------------+
mysql_B> SELECT
SUBSTRING_INDEX(File, '/', -1) AS BinLog,
Position
FROM mysql.ndb_binlog_index
WHERE epoch >= 1915555414023
ORDER BY epoch ASC LIMIT 1;
+------------------------+----------+
| BinLog | Position |
+------------------------+----------+
| master_B_binlog.000006 | 405 |
+------------------------+----------+
Back to the Slave, we’re using the CHANGE MASTER TO command to point it to the mysql_B
server:
mysql_Slave> STOP SLAVE;
mysql_Slave> CHANGE MASTER TO
MASTER_LOG_FILE = 'master_B_binlog.000006',
MASTER_LOG_POS = 405,
MASTER_HOST='127.0.0.1',
MASTER_PORT=3307;
You should now be able to start the Slave and previously done changes should get
replicated:
mysql_Slave> START SLAVE;
mysql_Slave> SELECT * FROM attendees;
+----+-------------------+
| id | email |
+----+-------------------+
| 3 | andrewm@localhost |
| 1 | geertv@localhost |
| 2 | andrewh@localhost |
| 4 | marta@localhost |
+----+-------------------+
Copyright © 2010, Oracle and/or its affiliates. All rights reserved. 80/81