MySQL Cluster Tutorial - cdn.oreillystatic.com

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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
Security It should be noted right from the start that MySQL Cluster nodes have no security in their communications. This is because the overhead required would cause a very large performance hit. So all nodes should be on a private LAN. The added advantage is having the cluster on a private LAN can stop any other network chatter from delaying node communications. MySQL Authentication The privileges system used by MySQL is stored using MyISAM tables. Due to some internal restrictions changing these to the NDB engine will cause many complications, therefore all privileges should be synchronized externally (using a script for instance). Copyright © 2010, Oracle and/or its affiliates. All rights reserved. 81/81
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MySQL Cluster Tutorial O’Reilly M
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ndbinfo Data Node Statistics! 39 nd
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Introduction MySQL Cluster is a too
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MySQL Cluster in short • MySQL Cl
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Installation and Configuration In t
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Configuration my_Slave.cnf Configur
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Starting & Using MySQL Cluster Star
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ndb_mgm> show Connected to Manageme
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Administer MySQL Cluster MySQL Clus
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ndb_mgm> 2 restart Node 2: Node shu
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to load problems such as timing iss
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MySQL Cluster Manager MySQL Cluster
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• The management node(s) can cont
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Example configuration Throughout th
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Page 39 and 40: NDB Info ndbinfo Data Node Statisti
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Page 51 and 52: • SessionFactory: There is one in
Page 53 and 54: Figure 4: Performance of OpenJPA Ad
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