MySQL Replication VS Mirroring and how to do both? - mysql

Question

MySQL Replication VS Mirroring and how to do both, does anyone knows some information on this topic?

Answer 1

MySQL Replication: https://www.youtube.com/watch?v=APAmsHAYUiI
So replication it is one way relationship: Master to Slave.
Mysql:
Stop Slave: stop slave;
Tell the Slave that it is a Slave and where to locate the Master:
Mysql:
CHANGE MASTER TO
MASTER_HOST = '192.168.1.111',
MASTER_USER = 'master_replication_user',
MASTER_PASSWORD = 'master_password',
MASTER_LOG_FILE = 'DESKTOP-MASTER-PC-bin.000978',
MASTER_LOG_POS = 678;
Start Slave: start slave;
Check Slave Status: show slave status;
MySQL Mirroring: https://www.ryadel.com/en/mysql-master-master-replication-setup-in-5-easy-steps/
The main point here is: There are two Masters (so they like a slave to each other, but they will never admit it). You just tell Master A that it is slave of the Master B. And then you tell Master B that he is the slave of Master A. It is reciprocal relationship.
Stop Master A: stop slave;
Stop Master B: stop slave;
3.Tell the Master A where to locate the Master B
CHANGE MASTER TO
MASTER_HOST = '192.168.1.111',
MASTER_USER = 'master_b_replication_user',
MASTER_PASSWORD = 'master_b_password',
MASTER_LOG_FILE = 'DESKTOP-MASTER-B-PC-bin.000756',
MASTER_LOG_POS = 888;
4.Tell the Second Master where to locate the First Master
CHANGE MASTER TO
MASTER_HOST = '192.168.1.112',
MASTER_USER = 'master_a_replication_user',
MASTER_PASSWORD = 'master_a_password',
MASTER_LOG_FILE = 'DESKTOP-MASTER-A-PC-bin.000001',
MASTER_LOG_POS = 777;
Mysql:
5.Master A: start slave;
6.Master B: start slave;
7.Check Master A Status: show slave status;
8.Check Master B Status: show slave status;