MySQL Router

2. Copyright © 2016, Oracle and/or its affiliates. All rights reserved. |
MySQL Router
Prasad Vasudevan
Copyright © 2016, Oracle and/or its affiliates. All rights reserved.

3. Safe Harbor Statement
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The following is intended to outline our general product direction. It is intended for
information purposes only, and may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or functionality, and should not be relied upon
in making purchasing decisions. The development, release, and timing of any features or
functionality described for Oracle’s products remains at the sole discretion of Oracle.

4. Program
Agenda
Introduction to MySQL Router
Connection Routing
InnoDB Cluster
Metadata cache Routing
Demo
1
2
3
4
5
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5. Program
Agenda
Introduction to MySQL Router
Connection Routing
InnoDB Cluster
Metadata cache Routing
Demo
1
2
3
4
5
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6. MySQL Router: Need ?
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•High availability
– On server failure, the application should connect to proper server
– Not desirable for the application to handle this
• Load balancing
– In a HA system, efficiency is increased using more resources
– Helps to handle traffic properly

7. MySQL Router: Key Features
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•Provides transparent routing between application and
backend MySQL servers
•Pluggable Architecture
– Allows MySQL developers to easily extend the product with
additional features
– Allows users to create their own custom plugins
•Provides High availability and Load balancing

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9. Program
Agenda
Introduction to MySQL Router
Connection Routing
InnoDB Cluster
Metadata cache Routing
Demo
1
2
3
4
5
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10. Connection Routing
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• Forwards MySQL packets to backend server without
inspecting or modifying them
• Achieved with routing plugin
• Routing strategy :
– First available
– Round robin

11. Connection Routing : Example
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12. Connection Routing : Configuration
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13. Connection Routing : Start Routing
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14. Program
Agenda
Introduction to MySQL Router
Connection Routing
InnoDB Cluster
Metadata cache Routing
Demo
1
2
3
4
5
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15. InnoDB Cluster : Introduction
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• Provides complete HA solution for MySQL
• MySQL Shell enables to easily configure and administer MySQL
server instances to function as an InnoDB Cluster
• Servers run MySQL Group Replication :
– Replicate data
– Built-in failover

16. InnoDB Cluster : How to ?
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• MySQL Shell includes Admin API which is accessed through the
dba global variable and its associated methods
• The methods allow to deploy, configure and administer InnoDB
clusters
• Shell provides two scripting language modes, JavaScript and
Python, in addition to SQL mode
– Default mode : JavaScript
– Switch modes issuing js , py, sql

17. InnoDB Cluster : How to ?
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18. InnoDB Cluster : How to ?
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19. InnoDB Cluster : Overview
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20. Program
Agenda
Introduction to MySQL Router
Connection Routing
InnoDB Cluster
Metadata cache Routing
Demo
1
2
3
4
5
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21. Metadata cache Routing : Introduction
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• Provides transparent client routing, load balancing and failover
to InnoDB clusters
• Achieved with metadata_cache plugin
• Router uses metadata_cache plugin to retrieve InnoDB cluster’s
metadata periodically
•In the event of server failure, cluster adjusts the topology and
Router detects this change

22. Metadata cache Routing : How to ?
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• Using --bootstrap option, Router retrieves the InnoDB cluster
metadata and automatically creates a configuration file
• Generated Router configuration by default creates TCP ports which
can be used to connect to cluster
• Additionally, sockets to connect, can be created using
--conf-use-sockets option while bootstrapping
• Ports, Sockets for both MySQL Protocol and X Protocol created

23. Metadata cache Routing : Configuration
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• Bootstrap example :
•Configuration file generated is automatically generated at
/home/prasad/dir/mysqlrouter.conf

24. Metadata cache Routing : Configuration
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25. Metadata cache Routing : Configuration
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26. Metadata cache Routing : Configuration
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27. Metadata cache Routing : Start Routing
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28. Metadata cache Routing : Key Features
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• User doesn’t need to be aware of the topology information and
details of all servers
• Routing will be proper :
– In the event of failover
– When new servers get added to the cluster

29. Program
Agenda
Introduction to MySQL Router
Connection Routing
InnoDB Cluster
Metadata cache Routing
Demo
1
2
3
4
5
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30. THANK YOU!
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