Redundancy is the prominent technique for creating resilient, highly
available services. MySQL has had a quite mature and feature rich
replication solution for over a decade now. Moreover, there are
interesting new features that allow users to create quite advanced
setups. Nowadays, there is group replication, multi-source replication,
and of course plain asynchronous replication that allow users to
create interesting new setups.
In this session we will present recommended ways to mix and match
group replication with regular asynchronous replication. We will
show how the user can combine both to create simple upgrade/migration
paths to complex setups. We will also show specifically on group
replication what is the recommended procedure to provision and deploy
replicas and detail what happens behind the scenes when a replica
joins the group.