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MySQL 5.7 Reference Manual  /  ...  /  Replication Channel Naming Conventions

18.2.3.4 Replication Channel Naming Conventions

This section describes how naming conventions are impacted by replication channels.

Each replication channel has a unique name which is a string with a maximum length of 64 characters and is case insensitive. Because channel names are used in slave tables, the character set used for these is always UTF-8. Although you are generally free to use any name for channels, the following names are reserved:

  • group_replication_applier

  • group_replication_recovery

The name you choose for a replication channel also influences the file names used by a multi-source replication slave. The relay log files and index files for each channel are named base_name-relay-bin-channel_name.0000x, where base_name is generally a host name (if not specified using --log-bin) and channel_name is the name of the channel logged to this file.


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