MySQL interprets multi-master to mean two servers which replicate to each other -- that is, each server is both master to and slave of the other. Implementation is largely the same as any other replication setup, with the exception that the servers should not be permitted to generate the same auto_increment values. This is solved by setting one server to use even numbers, and the other to use odd numbers. The same principle applies to creating a ring of servers; obviously, the auto_increment_increment will need to match or exceed the number of servers in the ring.
Multi-master can also mean one slave accepts updates from two different masters. At this time, MySQL does not readily support such a setup with replication. The desired end results might be achieved using MySQL Cluster.
Related Q&A from Scott Noyes
Get suggestions for choosing MySQL character sets and field collations from expert Scott Noyes.continue reading
An expert describes where to find information on detection deadlock algorithms in MySQL.continue reading
An expert defines MySQL's query cache and describes when to use it and when to avoid it.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.