In this blog post, we are going to show you some examples of things that can go wrong in Galera - inexplicable node crashes, network splits, clusters that won’t restart and inconsistent data. We’ll take a look at the data stored in log files to diagnose the problems, and discuss how we can deal with these.
This builds upon the previous post, where we looked into log files produced by Galera (error log and innobackup.* logs). We discussed how regular, “normal” activity looks like - from …[Read more...]