Private cloud, is there a place to be?

Question

System administration

Good afternoon, dear habrauser!

The question is long overdue, but I want to put everything on the shelves. I have in my lab a proven and debugged design of a private cloud with cool buns - decentralized storage, high availability of virtual machines, ease of maintenance, open source and sane roadmaps of developers and, if necessary, their direct support readiness.

And the question is incredibly simple, but necessary for your opinion - in your opinion, where and when does a private virtualization platform win compared to public cloud providers like Amazon.

Answer 1

1) privacy (but there is a threat of a mask show)
2) the channel to the next room is faster than the channel to the data center in America
3) greater dependence on the qualifications of the administrator. if the admin is advanced, that's good. if not, then bad.

Answer 2

She wins only in privacy, in everything else she loses, in fact, privacy is the main reason for private clouds, well, in some places there is still the importance of a response up to milliseconds.

Answer 3

As far as I understand cloud technologies, the data storage system in them is based on finding duplicates and specifying an index on them, instead of actually storing the file. (Roughly speaking, if 10 users uploaded the same file, then the file itself will be stored in one place, and links will remain in nine), which will avoid excessive redundancy.
How is privacy ensured? Encryption. Good encryption means that when you re-encrypt the same file, the hash of the encrypted "copies" will be different. Thus, this is in no way consistent with the idea of ​​getting rid of redundancy. The cloud is extremely expensive and resource intensive.