Re: Virtualization

From: Mladen Gogala <>
Date: Wed, 8 Jan 2014 04:47:37 +0000 (UTC)
Message-ID: <>

On Tue, 07 Jan 2014 20:35:18 +0000, Drazen Kacar wrote:

> Mladen Gogala wrote:

>>  On Tue, 07 Jan 2014 19:24:32 +0000, Drazen Kacar wrote:

>> > Anyway, it seems to me that "a third party provider" isn't
>> > particularly useful feature if we want to determine whether something
>> > is or is not a cloud.
>>  Well, would you like to share your definition with me? I am all ears
>>  (actually screen).

> I tried to share NIST's definition because I'm not very good in
> inventing things. But you deleted that part of my post. I'm not sure if
> you've read the document:
> Page 2, Essential Characteristics.

Let's see:
"Essential Characteristics:

          On-demand self-service. A consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider.

          Broad network access. Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, tablets, laptops, and workstations).

          Resource pooling. The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. There is a sense of location independence in that the customer generally has no control or knowledge over the exact location of the provided resources but may be able to specify location at a higher level of abstraction (e.g., country, state, or datacenter). Examples of resources include storage, processing, memory, and network bandwidth.

          Rapid elasticity. Capabilities can be elastically provisioned and released, in some cases automatically, to scale rapidly outward and inward commensurate with demand. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be appropriated in any quantity at any time.

          Measured service. Cloud systems automatically control and optimize resource use by leveraging a metering capability1 at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer of the utilized service. "

This seems to speak of service provider and a service consumer, which is, as far as I understand things, about the same thing as an outsourced virtual machine, which is what most of the cloud implementations boil down to. So we are talking about the same thing. As for the security concerns, those are real. There are, at least in my experience, very few companies that would outsource their databases, which contain the critical business data. Things that are outsourced to the cloud usually include application servers or business functions like payroll, time sheets and alike.

Mladen Gogala
The Oracle Whisperer
Received on Wed Jan 08 2014 - 05:47:37 CET

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