Not sure about this term data I presume cant just be online ultimately it must be stored on a server somewhere?
thanksCloud computing - what is it?
"The Cloud" is a term to refer to the internet, or at least specific work-spaces of the internet. Cloud computing is a way of describing the disengagement of software from the underlying hardware. It doesn't sound that important, but it has far reaching implications.
For example if you have a server (lets say at work) that is running Citrix (popular application virtualisation software) with Microsoft Office running on it. You can access the applications that have been "published" from most computer by simply putting in a URL. This means that the program isn't installed on the machine you are running it from, but it appears to be.
There is also a move to decouple the software from the server hardware it is running on. This gets quite technical but basically you can have the hardware in several location, running the same software. This means if one piece of hardware fails it can automatically shunt to the next machine, without lose of service. You can then replace the faulty hardware at your leisure, without the need to reinstall and test all the services and applications.
It's a little difficult to separate the actual underlying methods that make it work from the hype that seems to get bundled in to talking about Cloud technologies.
I hope this make things a little clearer.
Edit:
@Debraj Das: For a short report by you it reads an awful lot like a copy and paste job from the Wiki entry on Cloud Computing. If you wrote the entry I retract my statement, if not you shouldn't pass off others work as your own.
Second Edit:
Cloud computing does not refer to the storage of data, that would be Cloud storage. Cloud computing specifically refers to processing and computation that is done while being disengaged from the underlying hardware.
wow even mr katz' answer stunk on this one.
You are absolutely right the data is stored on a server somewhere but we refer to this "somewhere" as a "cloud" because while stored on one server one day, it may be a different server the next, and in fact may be stored on several servers, partially or in full, at the same time. The main purpose of the cloud is to provide data redundancy (if one server has a failure, its ok because it is backed up by others with your data that are already online) as well as to balace the resources of the cloud to maximize the utilization of all available hardware (if the server currently serving you your data becomes over-taxed, the transaction can seamlessly resume from another that is not as utilized). With this type of service we can have access to a planets worth of hardware and storage space with nothing more than a terminal and a fast internet connection. Techincally your computer would not even need a hard drive.Cloud computing - what is it?
Think about the electrical grid. When you plug a light into the electrical grid, there must be something producing the power somewhere. Maybe it's nuclear, maybe it's solar, maybe it's a gas turbine generator. You don't know -- you don't have to think about that. You just plug the device into the grid, and the grid makes it work.
The cloud is the same way. You just store the data in the cloud. There must be something holding the data somewhere. Maybe it's hard drives, maybe it's tape. You don't know -- you don't have to think about that. You just store the data in the cloud and the cloud makes it work.
Cloud computing
Cloud computing refers to the provision of computational resources on demand via a computer network. Because the cloud is an underlying delivery mechanism, cloud based applications and services may support any type of software application or service in use today.
Cloud computing fundamentally allows for a functional separation between the resources used and the user's computer. The computing resources may or may not reside outside the local network, for example in an internet connected datacenter.
The phrase “cloud computing” originated from the cloud symbol that is usually used by flow charts and diagrams to symbolize the internet. The principle behind the cloud is that any computer connected to the internet is connected to the same pool of computing power, applications, and files.
Autonomic computing — "computer systems capable of self-management."
Client–server model – client–server computing refers broadly to any distributed application that distinguishes between service providers (servers) and service requesters (clients).[8]
Grid computing — "a form of distributed computing and parallel computing, whereby a 'super and virtual computer' is composed of a cluster of networked, loosely coupled computers acting in concert to perform very large tasks."
Mainframe computer — powerful computers used mainly by large organizations for critical applications, typically bulk data processing such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing.
Utility computing — the "packaging of computing resources, such as computation and storage, as a metered service similar to a traditional public utility, such as electricity."
Peer-to-peer – distributed architecture without the need for central coordination, with participants being at the same time both suppliers and consumers of resources (in contrast to the traditional client–server model).
Service-oriented computing – Cloud computing provides services related to computing while, in a reciprocal manner, service-oriented computing consists of the computing techniques that operate on software-as-a-service.
SAAS, IAAS, PAAS
Types of Cloud- Public cloud, Community cloud, Hybrid cloud, Combined cloud, Private cloud
Who is Offering On Demand Software? - The companies below are already established in the On-Demand software or SaaS business. These companies charge their customers a subscription fee and in return host software on central servers that are accessed by the end user via the internet.
International Business Machines (IBM), Salesforce.com (CRM), EfroTech.com (HRIS), Google (GOOG), NetSuite (N), Cordys, Taleo (TLEO), Concur Technologies (CNQR)
Active platforms
o International Business Machines (IBM) - IBM Cloud - Lotus Live
o Google (GOOG) - Apps Engine
o Amazon.com (AMZN) - EC2
o Microsoft (MSFT) - Windows Azure
o SAVVIS (SVVS) - Symphony VPDC
o Terremark Worldwide (TMRK) - The Enterprise Cloud
o Salesforce.com (CRM) - Force.com
o NetSuite (N) - Suiteflex
o Rackspace Cloud - cloudservers, cloudsites, cloudfiles
o Metrisoft
Major Infrastructure Vendors - Below are companies that provide infrastructure services:
o Google (GOOG) - Managed hosting, development environment
o International Business Machines (IBM) - Managed hosting
o SAVVIS (SVVS) - Managed hosting %26amp; cloud computing
o Terremark Worldwide (TMRK) - Managed hosting
o Amazon.com (AMZN) - Cloud storage
o Rackspace Hosting (RAX) - Managed hosting %26amp; cloud computing
Cloud applications
Online office suites, 24SevenOffice, Acrobat.com, Animoto, Google Apps, BigMachines, BlackSpider, Technologies Limited, Brightidea, Business Intelligence 2.0, Clam AntiVirus, CloudMe, Cloudsoft Monterey, Fatpaint, Google Cloud Connect, Google Docs, Google Fusion Tables, KnowledgeTree, LiveChat, LivePerson, LotusLive, Microsoft Forefront Online Protection for Exchange, QuickSchools.com, Salesforce.com, Nsite Software (Platform as a Service), Software as a service, Software plus services, Windows Phone Live , Zoho Office Suite etc.Cloud computing - what is it?
If your hard drive content was not stored on your own PC place but in a faraway dream world and the means to access it were down would you be able to use your computer?
Need to look at "cloud" a little more I think, before we actually use it.
It means if your internet goes down you have nothing to do.
It means if your password is hacked, you've lost everything.
It means if you lose everything, don't expect help from Google.
Welcome to Chrome OS.
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