Cloud Computing Markets for Jobs and Recruitment

Cloud computing involves delivering hosted services over the Internet. These services are broadly divided into three categories: Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS) and Infrastructure-as-a-Service (IaaS).

SaaS Software as a Service

Software as a Service provides all the functions of a application and software products through a Web browser. SaaS eliminates worries about app servers, storage, application development and managing IT. Services can be anything from Web-based email Google's Gmail, to CRM solutions like Salesforce.com. Because the service provider hosts both the application and the data, the end user is free to use the service from anywhere.

PaaS Platform as a Service

Platform as a Service in the cloud, provides the infrastructure on virtualized servers, where users can run new or existing applications, without the worry of maintaining the operating systems, server hardware or computing capacity. High profile PaaS, include Microsoft's Azure, Salesforce's Force.com and GoogleApps.

IaaS Infrastructure as a Service

Infrastructure as a Service provides clusters, like electricity grids for virtual servers, networks, storage and systems software designed to supplement or replace the functions of an entire data centre. High profile IaaS, include Amazon's Elastic Compute Cloud [EC2] and Simple Storage Service.

Cloud computing can be scaled to match any organization need. It's elastic, as user can have as much or as little of a service as they want and only pay for the serviced used.

Cloud computing can be private or public.

Public Cloud Computing

When most people talk of cloud computing, they usually mean Public Cloud Computing.

Public cloud gives agility by re-provision technological infrastructure, like applications and storage, on a pay-per-usage model.

The lowering of public cloud pricing will help the bottom line when organisations rely on public clouds instead of their own infrastructure.

So the bottom-line for Public Cloud Computing is money and speed

Public Clouds eliminates the Capital Expense, with pay-as-you-go pricing, reducing upfront capital outlays on hardware, software and IT staff. CIOs can use their IT dollars more efficiently by dramatically reducing IT expenditures. This allows the CIO to leverage cloud resources, leaving only elastic operational IT expenses on the balance sheet.

Public Cloud services offers speed of implementation. If your business needs a quick deployment of days to weeks rather than, weeks to months, then public cloud is your best option. This gives CIOs the ability to cover a week-long spike in demand by adding more computing power as needed.

The main benefits of using a public cloud service are:

• Easy and inexpensive set-up because hardware, application and bandwidth costs are covered by the provider
• Scalability, providing extra compute, storage or development capacity when needed
• No wasted resources because you pay for what you use
• It's elastic, because organisations can use as much or as little of a service as needed
• The computer infrastructures is fully managed by public cloud service provider
• A hassle free way of providing solution when an outdated software needs refreshing

Research from IDC indicates, small and midsize companies will approach public cloud services as a a overall strategy, because theses companies won't already have a big investment in applications or infrastructure.

"We are already well on the way with this initiative. The private cloud concept brings with it the benefits of agility, accessibility, efficiency, and the capability to scale while addressing the perceived risks in the public cloud environment today. "As public clouds mature, and security, integration and service-level guarantees are addressed, the ability to move to a hybrid model will no doubt become appealing for many organisations." Adam Gerrard, CIO at Avis Europe.

It's estimated over the next five years, there will large take up by small and medium enterprises taking advantage of public cloud computing because they won't be able to afford private clouds.

There's an increasing number of software companies, like Microsoft, Oracle, providing cloud infrastructures with their propriety software.

Private Cloud Computing

With Public Cloud Computing, organisations don't own the computer infrastructure. So if they need to maintain control over their data, then they should look at cloud computing on private networks. A Private cloud also called Internal Cloud or Corporate Cloud.

A private cloud, refers to the privately-held, proprietary network or data center using cloud computing infrastructure, with similar capabilities as the cloud, to a limited number of people behind a firewall.

The downside of Private Cloud Computing, the users still need to buy, build, and manage the computer infrastructure eliminating many of the cost-benefits of cloud computing.

Analysts predict 2012 will see large corporations moving to private cloud. Because technologies pioneered by the cloud computing vendors will be offered, so they can upgrade Their IT.

Hybrid Cloud Computing

Some organisations want to protect their sensitive information, but not all their data needs to be bullet proof. So Hybrid Cloud Computing provides the best of both worlds, while keeping their sensitive information on a private cloud, and everything else in a public cloud.

So Hybrid Cloud Computing gets the cost-saving associated with public clouds, with most of processing and data storage transacted on a public cloud, & the data needing security done in a private cloud.

Examples of public clouds include Amazon Elastic Compute Cloud (EC2), IBM's Blue Cloud.

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