It’s perfectly possible, you just can’t take shortcuts, you’ll lose quite a bit of performance. And of course if you really ‘share’ a resource the users are goi

It’s perfectly possible, you just can’t take shortcuts, you’ll lose quite a bit of performance. And of course if you really ‘share’ a resource the users are going to know a bit about each other. If each users share grows and shrinks as others are using more or less they are going to know that. But if you don’t want that you could just reserve a fixed part of the resource and they wouldn’t know.