Not too long ago, Microsoft released The Final Service Pack for any version of SQL Server, as a part of their move to a Modern Servicing Model. This (and the fall time here in Finland) got me again thinking about the benefits of running your database workloads on PaaS over self-managed VMs. And one of the very real benefits is, that PaaS databases tend to be running with up-to-date versions. This is what you might have seen called as “evergreen” by Microsoft. When it comes to SQL Server running on VMs, well, these tend to be more of a “nevergreen” type of deployments. At best, they are somewhat yellow, but almost always never green.
And this isn’t an on-premises problem only, patching self-managed database services in the cloud is just as unpleasant as it is on-premises. But unlike death and taxes, continuously patching your operating system and the database software is something that you can avoid, without having to fear cosmic powers or a prison. It does require us to adjust our thinking on how we’re managing these systems, though: The databases aren’t the same as the virtual machines, and your virtual machines should be treated like they are disposable, not like pets.(more…)