Cloud 9 Computing

Cloud computing users can avoid capital expenditure (CapEx) on hardware, software, and services when they pay a provider only for what they use. Consumption is usually billed on a utility (resources consumed, like electricity) or subscription (time-based, like a newspaper) basis with little or no upfront cost. Other benefits of this time sharing-style approach are low barriers to entry, shared infrastructure and costs, low management overhead, and immediate access to a broad range of applications. In general, users can terminate the contract at any time (thereby avoiding return on investment risk and uncertainty), and the services are often covered by service level agreements (SLAs) with financial penalties.

A cloud client consists of computer hardware and/or computer software that relies on cloud computing for application delivery, or that is specifically designed for delivery of cloud services and that, in either case, is essentially useless without it.For example:
  • Mobile (Linux based - Palm Pre-WebOS Linux Kernel, Android-Linux Kernel, iPhone-Darwin Kernel, Microsoft based - Windows Mobile)
  • Thin client (CherryPal, Wyse, Zonbu, gOS-based systems)
  • Thick client / Web browser (Internet Explorer, Mozilla Firefox, Google Chrome, WebKit)
A cloud application leverages cloud computing in software architecture, often eliminating the need to install and run the application on the customer's own computer, thus alleviating the burden of software maintenance, ongoing operation, and support. For example:
  • Peer-to-peer / volunteer computing (BOINC, Skype)
  • Web applications (Webmail, Facebook, Twitter, YouTube, Yammer)
  • Security as a service (MessageLabs, Purewire, ScanSafe, Zscaler)
  • Software as a service (A2Zapps.com, Google Apps, Salesforce,Learn.com, Zoho, BigGyan.com)
  • Software plus services (Microsoft Online Services)
  • Storage [Distributed]
    • Content distribution (BitTorrent, Amazon CloudFront)
    • Synchronisation (Dropbox, Live Mesh, SpiderOak, ZumoDrive)


    A cloud platform (PaaS) delivers a computing platform and/or solution stack as a service, generally consuming cloud infrastructure and supporting cloud applications. It facilitates deployment of applications without the cost and complexity of buying and managing the underlying hardware and software layers. For example:
  • Services
    • Identity (OAuth, OpenID)
    • Payments (Amazon Flexible Payments Service, Google Checkout, PayPal)
    • Search (Alexa, Google Custom Search, Yahoo! BOSS)
    • Real-world (Amazon Mechanical Turk)
  • Solution stacks
    • Java (Google App Engine)
    • PHP (Rackspace Cloud Sites)
    • Python Django (Google App Engine)
    • Ruby on Rails (Heroku)
    • .NET (Azure Services Platform, Rackspace Cloud Sites)
    • Proprietary (Force.com, WorkXpress, Wolf Frameworks)
  • Storage [Structured]
    • Databases (Amazon SimpleDB, BigTable)
    • File storage (Centerra Blades,Amazon S3, Nirvanix, Rackspace Cloud Files)
    • Queues (Amazon SQS) 

    The more you learn, the more you come to know
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1 comments:

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August 6, 2015 at 1:20 AM

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