3 Async Database Replication MySQL 5.6
A is Master of B and B is Master of A
A is Master of C
We are looking into transforming our replication into GTID replication instead of the traditional replication but there is one thing which we would like to understand.
Say there is database X on server A and C but the writes on database X are only done on Server C since it is only used for ETL purposes . If we understood correctly that if we would like to promote Server C to master thereby changing the replication to following:
C is Master of A
A is Master of B
Essentialy what we would do is STOP SLAVE; on Server C and Server A , check that the slave_is_subset is returning 1 using GTID_SUBSET() and change MASTER_HOST on Server A to C and start slave on Server A. In this case but Server A will receive the transactions of database X which were executed on Server C, is there a way to not allow this from happening (apart from replicate-ignore filters) and have it function sort of like traditional binlog replication that you start from a specific point? We know this would go probably against the purpose of GTID which is not requiring to find the position from where to continue replicating but we would like to try understand the flexibility of GTID.
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