Product Documentation
ADC
14.1 - Current Release 13.1 13.0 12.1
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Configure load balancing for DataStream

September 14, 2021
Contributed by: 
S C

Before configuring a load balancing setup, you must enable the load balancing feature. Then, begin by creating at least one service for each database server in the load balancing group. With the services configured, you are ready to create a load balancing virtual server and bind the services to the virtual server.

Note:

For databases, the load balancing can only occur on homogenous database servers (database servers that contain the exact same databases). For a configuration that contains unique databases on different servers, you must use content switching. If some of your database servers host identical content, you can use load balancing on those servers only. You can then use content switching policies to send requests to the load balancing virtual server that manages load balancing for those databases.

The Citrix ADC appliance currently stores the database name and login information during the database session. When a query is made to the database, it uses that information to connect to the specific database server.

Parameter values specific to DataStream

  • Protocol

    Use the MYSQL protocol type for MySQL databases and MSSQL protocol type for MS SQL databases while configuring virtual servers and services. The MySQL and TDS protocols are used by the clients to communicate with the respective database servers by using SQL queries. For information about the MySQL protocol, see http://dev.mysql.com/doc/internals/en/client-server-protocol.html. For information about the TDS protocol, see http://msdn.microsoft.com/en-us/library/dd304523(v=prot.13).aspx.

  • Port

    Port on which the virtual server listens for client connections. Use port 3306 for MySQL database servers.

  • Method

    It is recommended that you use the Least Connection method for better load balancing and lower server load. However, other methods, such as Round Robin, Least Response Time, Source IP Hash, Source IP Destination IP Hash, Least Bandwidth, Least Packets, and Source IP Source Port Hash, are also supported.

    Note: URL Hash method is not supported for DataStream.

  • MS SQL Server version

    If you are using the Microsoft SQL Server, and you expect some clients running a different version from your Microsoft SQL Server product, set the Server Version parameter for the load balancing virtual server. The version setting provides compatibility between the client-side and server-side connections by ensuring that all communication conforms to the server’s version. For more information about setting the Server Version parameter, see Configuring the MySQL and Microsoft SQL server version setting.

  • MySQL Server version

    If you are using the MySQL Server, and you expect some clients running a different version from your MySQL Server product, set the Server Version parameter for the load balancing virtual server. The version setting provides compatibility between the client-side and server-side connections by ensuring that all communication conforms to the server’s version. For more information about setting the Server Version parameter, see Configuring the MySQL and Microsoft SQL server version setting.

Configure load balancing for DataStream
September 14, 2021
Contributed by: 
S C
September 14, 2021
Contributed by: 
S C

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