Yes, it can take that long. They actually forgot to add some tasks, like prerequisite changes in the OS settings and packages (for Linux). And a cluster setup c

Yes, it can take that long. They actually forgot to add some tasks, like prerequisite changes in the OS settings and packages (for Linux). And a cluster setup can take way longer (as you need networking setup, DNS setup, OS users, shared storage and so on). And after that you have to setup a way for it to automatically start (if it's not a cluster but a standalone db). But they also cheated a bit, as you can install a DB without containers and it takes less time and less disk space. If it's on Windows... it's easier to install a standalone DB, but way stranger to install a cluster. About 5 years ago I actually participated in a project where we had to install a cluster on Windows, and it took 5 days for 2 guys from Oracle (and they were not paid by the hour). They produced a document describing the steps (so the install could be reproduced) and it contained things like "and now add the Windows system registry key [...] and set it to [...]" (and I could not find any kind of documentation on what that key did on the whole Internet, but without it the install failed) or "now unzip the patch file, but do not follow the patch notes (to copy the a.dll from the root of the archive) but take the a.dll from the X subfolder" (for which there was no mention in the documentation). Up until that point I thought the Linux cluster setup was hard, this changed the whole perspective :).