Cloud Computing Deployment Models

There are four models to deploy applications/services on the cloud.

Private cloud. The cloud infrastructure is provisioned for exclusive use by a single organization comprising multiple consumers (e.g., business units). It may be owned, managed, and operated by the organization, a third party, or some combination of them, and it may exist on or off premises.

Features of Private cloud:

• Internal to the enterprise

• Buy or lease model

• Secure infrastructure

• Dedicated infrastructure

• Resources are pooled and managed internally

• Internal security practices can be extended to the private cloud

• Greater control and resilience

• Greater customization and configuration

• Greater efficiencies and effectiveness

• Protected by a firewall

• Virtualization technology most adaptable for the private cloud

• Better cost management

• “Cloud computing at home”

Public cloud. The cloud infrastructure is provisioned for open use by the general public. It may be owned, managed, and operated by a business, academic, or government organization, or some combination of them. It exists on the premises of the cloud provider.

Features of public cloud:

• Universal usage

• Variety of functions

• Variable fee arrangements

• Multi-tenant infrastructure

• Cloud Service Provider (CSP) is responsible for setting up most of the resources namely hardware, software, network, communication, applications, security

• Some level of configurations and customizations

• Public cloud does not imply that the date is public

• Access control and mechanism may be in place

• May be a pay per use or on demand model

• May cost something and may not always be free

• May be a good avenue for Open Data

Hybrid cloud. The cloud infrastructure is a composition of two or more distinct cloud infrastructures (private, community, or public) that remain unique entities, but are bound together by standardized or proprietary technology that enables data and application portability (e.g., cloud bursting for load balancing between clouds).

Community cloud. The cloud infrastructure is provisioned for exclusive use by a specific community of consumers from organizations that have shared concerns (e.g., mission, security requirements, policy, and compliance considerations). It may be owned, managed, and operated by one or more of the organizations in the community, a third party, or some combination of them, and it may exist on or off premises.


Cloud Computing Service Models.

Cloud computing offer three main service models:

Software as a Service (SaaS). The capability provided to the consumer is to use the provider’s applications running on a cloud infrastructure2. The applications are accessible from various client devices through either a thin client interface, such as a web browser (e.g., web-based email), or a program interface. The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings.

Platform as a Service (PaaS). The capability provided to the consumer is to deploy onto the cloud infrastructure consumer-created or acquired applications created using programming languages, libraries, services, and tools supported by the provider.3 The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, or storage, but has control over the deployed applications and possibly configuration settings for the application-hosting environment.

Infrastructure as a Service (IaaS). The capability provided to the consumer is to provision processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software, which can include operating systems and applications. The consumer does not manage or control the underlying cloud infrastructure but has control over operating systems, storage, and deployed applications; and possibly limited control of select networking components (e.g., host firewalls).

There are others services getting relevance such as  Mobiles as a Service or Desktop as a Service.

What is Cloud Computing ?


Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model is composed of five essential characteristics, three service models, and four deployment models.


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 capability 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.

Selecting IaaS good links

Selecting your IaaS provider is not an easy job.

Below some information and links about IaaS products and providers that may be useful  when selecting your provider,    IBM company


Key components of IaaS

Orchestration and Hybrid cloud

Building Private IaaS

Change your master password and enable 2-factor authentication immediately


Amazon Web Services announces next generation EC2 instances

– Custom 2.4 GHz Intel Xeon E5-2676 Haswell processors

– Lower network latency and jitter

– Dedicated bandwidth to Amazon Elastic Block Store (EBS)


Dropbox opens up on enterprise cloud strategy with security and integration updates

– Two-step verification

– Tiered administrative controls

– Extension to Dropbox for Business API with new capabilities for shared folders


Mirantis | The Pure Play OpenStack Company


Converged cloud solutions and hyperconverged appliances.

“Hyperconvergence: the Next Tidal Wave in IT Infrastructure – Breaking

Analysis” –

Building a Hyperconverged Infrastructure in the Data Center –

Nutanix: “What is web-scale IT?” –

Simplivity: “Hyperconvergence- Convergence 1,2,3” –

“Atlantis Computing and their USX – hyperconverged software

platform.” –

Recommended Reading:


Securing & optimizing Public IaaS

Certificate of cloud security knowledge.

Online web-based examination

example of Innovation in security using hyprvisors.

Assesing and comparing PaaS providers

Demo about using Cloud Foundry including portability to other cloud

“What is Cloud Foundry?”

“Get Started on Cloud Foundry – Demo”:

“5 minute wonders: From zero to hero with AppHarbor”:

Applications Delivery Networs –  ADN and cloud

Video: The Application Delivery Network –

Video: What is a CDN and How Does It Work? –

Video: Content Delivery Network (CDN) Basics –

Video: Introducing Software-Defined Application Delivery –

Recommended Reading:

Future look

“55% of enterprises predict cloud computing will enable new

business models in three years”: http://www.cloudcomputing-


“‘Airbnb for cloud’: How the sharing economy will end the mega-

hosters’ monopoly”: http://www.cloudcomputing-


“Gartner: How Cloud Brokers Will Differentiate”:

Required Reading: