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Restore getting InnoDB position from mariabackup --no-lock
Revert the patch for MDEV-18917, which removed this functionality. This restores that mariabackup --prepare recovers the transactional binlog position from the redo log, and writes it to the file xtrabackup_binlog_pos_innodb. This position is updated only on every InnoDB commit. This means that if the last event in the binlog at the time of backup is a DDL or non-transactional update, the recovered position from --no-lock will be behind the state of the backup. Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
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