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Definition of Private Cloud

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In the last month a lot of people started to talk about private cloud. When people refer to private cloud, they already have an image in their mind with machines that are hosted by them.
The “private cloud” term in general don’t refer to a cloud (like Windows Azure) that is hosted by the client.
The term “private cloud”, that now is used more and more refers to a computing power and storage that is accessible by only a limited numbers of devices (machines). This private network that is created can be behind a firewall or in a private network that is not connected to the internet.
 The key term of this definition is “private”. Only a limited number of users can access these resources. Using virtualization and distributed computing can allow administrators to create very complicated networks and datacenters that provide access to different services and resources for all the consumers from that network. All the information that flow on a private cloud is controlled by the administrators of that private cloud.
Physically, the private cloud doesn’t need to be on machines that are owned by the company. A private cloud can have 3 types of configuration:
  • All the physical machines are own and hosted by the client.
  • All the physical machines are in a public cloud (for example in Windows Azure). In this case the machines are in a private network that can be accessed only from that network.
  • A part of physical machine is from a private network of the client but also from a public cloud like Windows Azure. In this case a private network exists between all this machines. All the data that exist in this private network can be accessed only from the network.  
The properties of a private cloud should be the following:
  • Scalable
  • Shared
  • Elastic implementation
  • Automated
From what we saw, a private network can have different configuration. The networks that form the private cloud (computing resources, data and so on) have limited access. Only from that private network this resources can be accessed and consume. The customer has the control and ownership of all the content regardless of location. The provider of this services offer limited access to this resources – only for the client that need the private cloud.
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  1. AnonymousJuly 9, 2012 at 4:21 PM

    Another "definition" of private cloud would be: "I am a very, very large enterprise, I want to use Azure, but I don't want to host my app on Microsoft datacenters" - now I can go to Fujitsu or HP with my Azure apps.. ;)
    (desi unii zis ca "private cloud" ar fi o contradictie in termeni: http://news.cnet.com/8301-13556_3-10150841-61.html)

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    Replies
    1. AnonymousJuly 9, 2012 at 4:24 PM

      sorry for my romenglish :)
      (although some said that "private cloud" is a contradiction in terms: http://news.cnet.com/8301-13556_3-10150841-61.html)

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