Or how wsrep_on can bring you to have a cluster with usless data.
This is a WARNING article, and it comes out after I have being working on define internal blueprint on how to perform DDL operation using RSU safely.
The fun, if fun we want to call it, comes as usual by the fact that I am a curious guy and I often do things my way and not always following the official instructions.
Anyhow, lets us go straight to the point and describe what can happen on ANY MySQL/Galera installation.
The test environment, MySQL/Galera (Percona PXC 5.6.20 version). …[Read more...]