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Your question has been migrated by a moderator (not an admin) who currently has the second most reputation on our site and should know what is welcome here and what is not and most importantly, where you are most likely get the help you seek. So, I will ask again: Why do you question this? Honestly, you should thank him for taking the time to redirect you to a better spot.
We don't accept capacity planning questions. If your question is "I have resource X - is this enough to do Y" or "How much of X do I need to do Y" then it's not welcome here. The reason is is that in 99% of cases there is no simple rule and you have to test for your specific workload. It might be that this isn't true for Ceph and there is an easy formula to follow, but even then I guess it's just a rule of thumb and the full answer is more complex with a lot of "it depends".
Yes, and that's the major problem with the CoC crap. It tries to forces the lowest common value of "rude" on everyone. Rude would be "You are an idiot, go away", this is merely not helpful.
I agree that "emergency" situations might make it kind of necessary to use VBox. The thing remains: Most users on Server Fault don't use it, but it's quite popular with end users, so I believe it makes much more sense to ask this e.g. on Super User.
