When checking for a semi sync indication header, we need also check if
the undocumented session variable @rpl_semi_sync_slave was set.
Otherwise the timestamp of the event could contain values which match
the 2 bytes of the semi sync header.
Since the variable rpl_semi_sync_slave and it's behavior is not documented,
a new option MARIADB_RPL_SEMI_SYNC was added.
Added new option MARIADB_OPT_RPL_REGISTER_REPLICA which expects
two parameters, host and port. When this option was set, rpl_open
will send a COM_REGISTER_SLAVE command with server_id, host and
port to the connected server. This information can be retrieved
by "SHOW SLAVE STATUS" command.
Example:
rc= mysql_optionsv(mysql, MARIADB_OPT_RPL_REGISTER_REPLICA,
"myhost", 123);
When receiving a ROTATE event, the offset of filename
was not computed correctly. Similiar to the
BINLOG_CHECK_POINT event filename will also be stored
in MARIADB_RPL handle
Beside already supported asynchronous replication
the replication/binlog API now supports semi
synchronous replication:
If an event contains a semi synchronous indicator (0xEF)
behind status byte and acknowledgement flag is set,
mariadb_rpl_fetch() automatically sends an acknowledge
message to the connected primary server.
