In this blog, we’ll look at group replication and how it deals
with flow control (FC) and replication lag.
Overview
In the last few months, we had two main actors in the MySQL
ecosystem: ProxySQL and Group-Replication (with the evolution to
InnoDB Cluster).
While I have extensively covered the first, my last serious work
on Group Replication dates back to some lab version years past.
Given that Oracle decided to declare it GA, and Percona’s
decision to provide some level of Group Replication support, I
decided it was time for me to take a look at it again.
We’ve seen a lot of coverage already too many Group Replication
topics. There are articles about Group Replication and
performance, Group Replication and basic functionalities (or lack
of it like automatic node provisioning), Group Replication and
ProxySQL, and so on.
But one question kept coming up over and over in my …
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