COM_REGISTER_SLAVE

This command is sent by the replica server to start MariaDB replication, and should be sent before requesting binlog events with COM_BINLOG_DUMP.

The payload is:

• uint<1> command (COM_REGISTER_SLAVE = 0x15).

• uint<4> Replica server ID.

• Replica hostname length.

• Hostname.

• Replica username length.

• Username.

• Replica password length.

• Replica password.

• Replica connection port.

• Replication rank.

• Master server ID.

Note:

• Replica hostname, replica user, replica password, and replica port are usually not set. Some replica can be used for such settings (report_host, report_port etc).

• Replication rank is not set.

• Master server ID is not set either.

Example of COM_REGISTER_SLA

The replica server is configured with:

• server-id=10101;

• report-host=slave_n_1;

• report-port=23241.

We can see from the example:

• server_id [4] = 75 27 00 00 => 10101.

• hostname_len [1] = 09.

• hostname[n] = slave_n_1 (9 bytes).

• username len [1] = 0 (not set).

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