Cloud Computing

>Cloud Computing : –

Cloud computing is revolutionary step in the Virtualization world.Where you have freedom of managing the entire infrastructure, platform & software as a service.

Here are three most common feature of cloud computing.

1) PaaS -: Platform as a Service – PaaS is all about providing, a platform in the cloud, where applications can be developed ,customized & executed. Facilities include like Database Management(RDBMS/DBMS), Security, Workflow Management & Application

2) IaaS -: Infrastructure as as Service – IaaS is all about providing, a platform in the cloud, for infrastructure management
like Data Center, Power,Cooling,Rack & Space. Since we are aware that cloud is extended version of Virtualization where OS is encapsulated as a file and act like a physical server through there are some constraint available like VCPU can only support up to 8 VCPU etc.

3) SaaS – Software as a Service – SaaS is all about providing the concept of renting application functionality from a service provider rather than buying, installing and running software yourself.


This articles talks about VMware vCloud™ Express

The VMware vCloud™ Express service delivers the ability to provision infrastructure on-demand,pay as you go by the hours.

As a VMware Virtualized ™ service, it ensures compatibility with other VMware environments both internally and with external services.

* Quick, easy access to VMware Virtualized™ infrastructure for prototyping and development from external third party providers.

* Increase flexibility and time to market, and reduce capex and resource challenges associated with trying to address the fluctuating infrastructure needs of development, staging, and production teams.

* By leveraging the VMware platform, the VMware vCloud™ Express service retains the robustness, interoperability and reliability that VMware is known for while delivering the easy access and cost-effectiveness of a transactional service model.

* Five partners currently offering VMware vCloud™ Express service (as beta): Terremark, Hosting.com, and BlueLock in the Americas; Logica in EMEA; and Melbourne IT in the APAC.

Some Hard facts for VMware vCloud™ Express –

Virtual Machines can support up to max 8 CPU.
Virtual Machines can support up to max 16GB RAM.
Virtual machines can support up to max 7TB of STORAGE.

Few aspects of VMware vCloud™ Express for cloud computing


VDC

The first thing you need to do is to give your virtual machines a home. A home in vCloud Express is called a VDC or Virtual Data Center. To create a Virtual Data Center, click on the Manage button. You will have an option to create a new VDC and
give it a description. A good description might be a location such as Indianapolis, San Francisco, or Atlanta. You might also name your VDC based on the application (Mail, CoolApp5) or if you are hosting VMs for different companies you might use Acme, the DHARMA Initiative or Cyberdyne Systems. Make sure you read about vApps below before you go too far designing your VDCs.

vApp

After you’ve created a VDC, the next step is to create a vApp. Where a VDC is like a house, a vApp is like a room in your house. Probably the most common use would be to create a vApp container for the Production environment and another one called Dev or Test. You might also create vApps that contain different versions of your environment if you want to keep the old version around for some reason so your vApps would be v12, v13, v20, etc.. To create a vApp, click on the Manage button and then select vApp. As you create each vApp it will prompt you to choose a VDC in which to place your vApp.

VM

Now that you’ve created a home and some rooms, we need to put some residents in there. In vCloud Express those would be Virtual Machines. Virtual Machines are the actual Windows and Unix servers that will run your applications. To Create a VM,
click on the Manage button and then select VM. As you create each VM it will prompt you to choose a vApp in which to place your new VM. It will also ask you to choose a template from which to build your VM. Templates today are Ubuntu, Red Hat, CentOS, and Windows. We will be adding additional templates based on your feedback so let us know by posting a request in the forums. You will also be asked if you want your VM to be accessible over the network. Initially you should choose no so that you have an opportunity to apply the latest patches and do whatever is necessary to secure your VM. You can still access your VM through the remote console option (see below). After you have it secured to your satisfaction, you can go in and open access back up from the Internet or simply leave it isolated.

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