[CentOS] Add new app to repo & db install question

> Now, 5 9's is basically PHB-speak for "We want bragging rights", and
> is fairly unrealistic unless you're setting up a server farm and
> clustered services. You will need to test every update before you roll
> it out, and you'll have other work that you need to do.



indeed, and note that clusters introduce more complexity, and every 
piece of complexity is another possible avenue of failure.