Saturday I was in my favorite grocery store, standing in the line, browsing the net on my phone. I read Vadim Tkachenko‘s blog post about Measuring Percona Server Docker CPU/network overhead and his findings were opposite than mine – he didn’t found any measurable difference. Reading his post, he did found huge impact in networking which I didn’t check, so I was re-run my checks again, but now with paying attention to network configuration.
Back in October I have write about possible ways of running multiple MySQL instances on the same hardware. As the months passing by, the project of splitting our database schemas into standalone instances is closing in, so I started to check the different ways.
EDIT: This post is outdated, here is the follow up.
Currently, we have one database cluster with 15 different schemas – these schemas could be either schema which contains “real” data, or just schemas with metadata.
I guess the next evolutionary step of our database stack would be to split up the database cluster vertically along these schemas. All the data schemas should be moved to standalone mysql instances and put the metadata schemas next to them. This also could be a good project for prepare to move a certain part of the database for example to a cloud provider while other parts are still kept on bare metal.