What’s private? What’s public? What’s in-between? We’ve been talking quite a bit lately at Gartner about variations of isolation in a cloud computing architecture. It’s not black and white – it’s gray (aren’t all clouds?).
Private cloud computing requires that the enterprise have dedicated data centers and everything inside.
Public cloud computing assumes that the enterprise is using a service where everything is potentially shared with other users. Everything. Including transactions, data, analysis of the data – everything that took place or was stored as a part of the service (think Google search).
There are plenty of variations between the two – here’s a few:
- Perhaps you don’t want to share the transactions and analysis. You’re willing to use/share public data, you’re willing to share software – but how you use the software is your business.
- Or perhaps the data is yours. You will share a multitenant application and everything below it (think Salesforce.com).
- Or perhaps the you don’t want to share the application – you want your own dedicated copy, running on your own dedicated operating system, perhaps running in a virtual machine (typical Amazon EC2 deployment).
- Or, perhaps you want better isolation – you want your software to be the only thing running on your hardware at any one point in time. You may need more, you may need less, but when you acquire it it is all yours until you are done (typical horizontal scaling for web servers in the cloud).
- Or perhaps you want even more isolation – the hardware is reserved for you and you alone (think Exchange Online Dedicated).
And in all of this, management could be dedicated to just your stuff, or it could be shared. Management could even be running on dedicated hardware – or shared. And there are more variations.
A term starting to float out there in the industry is “virtual private clouds”. Reuven Cohen probably invented the term, but his use is different from some of the uses I’ve heard from vendors. Beware! It will be really important to understand what is truly “private” and what is truly “shared” when vendors start to use that term and many others to discuss what they’ve got. I can already hear the drumroll for more cloud computing terms being used in fifteen different ways – or is that thunder?
Read Complimentary Relevant Research
Cloud Computing Primer for 2018
Cloud is evolving from a market disruptor to an expected approach for traditional and next-generation IT. Our research offers actionable...
View Relevant Webinars
Insight for Midsize Businesses Comparing G Suite and Office 365
The ease of use and direct pricing of G Suite are very appealing to midsize organizations, as are the breadth of services and frequent...
Comments or opinions expressed on this blog are those of the individual contributors only, and do not necessarily represent the views of Gartner, Inc. or its management. Readers may copy and redistribute blog postings on other blogs, or otherwise for private, non-commercial or journalistic purposes, with attribution to Gartner. This content may not be used for any other purposes in any other formats or media. The content on this blog is provided on an "as-is" basis. Gartner shall not be liable for any damages whatsoever arising out of the content or use of this blog.