The goal of this theoretical presentation if to explain how a transaction is replicated when using Galera.

I discuss about what is certification and group communication explaining how it's performed. I also cover the difference between MySQL 5.6 GTID and Galera GTID.

We always say Galera replication in synchronous... is it really ? Always ? For every steps ?

What are the caveats of such replication ?

After this presentation, the audience should be comfortable with terms like Brute Force Abort, Flow Control, Local Certification Failure... and now what does virtual-synchronous mean.

The plan is to demystify this technology with easy illustrations and analogies.