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    <div>
     <h4 class="title">
      <a name="channels-naming-conventions">
      </a>
      19.2.2.4 Replication Channel Naming Conventions
     </h4>
    </div>
   </div>
  </div>
  <a class="indexterm" name="idm46045138072720">
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  <p>
   This section describes how naming conventions are impacted by
      replication channels.
  </p>
  <p>
   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 the replica's applier metadata
      repository table, 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:
  </p>
  <div class="itemizedlist">
   <ul class="itemizedlist" style="list-style-type: disc; ">
    <li class="listitem">
     <p>
      <code class="literal">
       group_replication_applier
      </code>
     </p>
    </li>
    <li class="listitem">
     <p>
      <code class="literal">
       group_replication_recovery
      </code>
     </p>
    </li>
   </ul>
  </div>
  <p>
   The name you choose for a replication channel also influences the
      file names used by a multi-source replica. The relay log files and
      index files for each channel are named
   <code class="filename">
    <em class="replaceable">
     <code>
      relay_log_basename
     </code>
    </em>
    -
    <em class="replaceable">
     <code>
      channel
     </code>
    </em>
    .xxxxxx
   </code>
   ,
      where
   <em class="replaceable">
    <code>
     relay_log_basename
    </code>
   </em>
   is a base name
      specified using the
   <a class="link" href="replication-options-replica.html#sysvar_relay_log">
    <code class="literal">
     relay_log
    </code>
   </a>
   system variable, and
   <em class="replaceable">
    <code>
     channel
    </code>
   </em>
   is the
      name of the channel logged to this file. If you do not specify the
   <a class="link" href="replication-options-replica.html#sysvar_relay_log">
    <code class="literal">
     relay_log
    </code>
   </a>
   system variable, a
      default file name is used that also includes the name of the
      channel.
  </p>
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