MySQL GTID replication

Traditional MySQL replication is based on relative coordinates — each
replica keeps track of its position with respect to its current
master's binary log files.

GTID enhances this setup by assigning a unique identifier to every
transaction, and each MySQL server keeps track of which transactions
it has already executed.

This permits "auto-positioning," the ability for a replica to be
pointed at a master instance without needing to specify a binlog
filename or position in the CHANGE MASTER statement.

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