Can you run multiple slave instances in MySQL?
Each time you start up a slave instance you shutdown the other mysql slave instances can be shutdown to keep load avg. to a minimum. Since 2011 the environment has changed a bit. Replication from multiple masters is now supported in MySQL 5.7 and MariaDB 10 – but they use slightly different syntax.
Can a slave be a slave to more than one master?
If each Master have a distinct Database that is mutually exclusive from other Master, you could have a Slave be a Slave to just one Master. Then, when all changes are posted, you would stop replication, run CHANGE MASTER TO command to point the Slave at a different Master.
Can a MySQL instance be shared with multiple machines?
MyISAM tables can theoretically be shared among multiple MySQL instances on the same machine, so it’s possible — on one machine — to create an individual MySQL instance for each machine you need to replicate from, and then one more instance that is able to see those tables through creative use of symlinks.
Is there a native solution to support multiple masters?
There is not a native solution in MySQL to support multiple masters, but there are some theoretical alternatives: Option 1. MariaDB 10, which has everything in MySQL 5.5, some things from MySQL 5.6, and some new things.
How does multi source replication work in MySQL?
Multi source replication is currently not widely supported by replication tools. In general these tools use the output from SHOW SLAVE STATUS to determine the replication state of the replicas. With multi source replication, there are several replication channels and thereby multiple replication streams.
What does multi source mean in MySQL 5.7?
Multi source replication is supported as of MariaDB 10.0 and MySQL 5.7. Basically this means that a replica is allowed to replicate from multiple masters. To enable this, the replica should not have multiple masters writing to the same schema as this would lead to conflicts in the write set.