News for hackers. Stuff that matters.

A comment on Dockerizing MySQL at Uber Engineering. Parent comment

Re:Dockerizing MySQL at Uber Engineering by falcolas on Monday November 28, 2016 @12:09PM (#13056758)
> In my experience it's generally safe to upgrade (and usually even downgrade) across post-GA point releases of the same major version

My experience with this mirrors the parents. The more data you have, and the more obscure engine features you use, the more likely it is to happen. It only takes one major failure to make you want to test the daylights out of any upgrades or downgrades.

[ Parent | on HN ]
Re:Dockerizing MySQL at Uber Engineering by evanelias on Monday November 28, 2016 @12:12PM (#13056776)
I agree; I wasn't advocating not testing. My point was more that the parent was overstating the risk, particularly around things like required schema changes, or data volumes no longer being usable. Those particular things aren't issues in my experience (for post-GA point releases), and I've worked at crazy scale.

The more common classes of problem are performance degradation, config options being added or renamed, new features being buggy in rare edge cases, etc. Not things particular to InnoDB's storage format or things that would prevent a volume from being usable with a different version.

[ Parent | on HN ]