The motivations for using the cloud, business situations where the cloud model works, technical considerations, and cost considerations. Where the cloud makes sense and why it is not right for everyone, covering factors such as energy conservation and maximum utilization of computing resources.
UK Government Information Source http://www.guardian.co.uk/technology/2010/jan/27/cloud-computing-government-uk
Image http://legalinsurrection.blogspot.com/2010/10/who-let-bumper-stickers-out.html Story http://highscalability.com/scaling-bumper-sticker-1-billion-page-month-facebook-ror-app
Image http://legalinsurrection.blogspot.com/2010/10/who-let-bumper-stickers-out.html Story http://highscalability.com/scaling-bumper-sticker-1-billion-page-month-facebook-ror-app Linked In currently has 100 million members http://www.digitaltrends.com/computing/linkedin-hits-100-million-members/
http://www.datacenterknowledge.com/archives/2010/04/09/kundra-fed-data-centers-7-percent-utilized/ More on utilization and cost saving http://www.datacenterknowledge.com/archives/2010/08/23/comparing-the-cost-of-cloud-vs-colocation/
Mr. Simon Ponsford's presentation at QITCOM 2011
When Does It Make Sense to Use the Cloud?<br />Technical, economic and environmental considerations<br />Simon Ponsford<br />Senior Scientist – Cloud Computing<br />QCRI<br />
Cloud Computing - Definition<br />What Is Cloud Computing?<br />Infinitely scalable shared computing resources available on demand via the Internet where the user is charged only for what they use. <br /> —Simon Ponsford, QCRI <br />Public Cloud<br />Made available to the general public.<br />Private Cloud<br />Datacenter of a business or organization e.g. the UK government intends to migrate the 500 existing government server rooms datacenters into 12 datacenters.<br />If a business simply virtualizes servers this is not a private Cloud<br />
Cloud Computing Advantages<br />The Advantages<br />Highly available<br />On demand – enterprise quality computing resources<br />No requirement to employ datacenter staff<br />No capital outlay<br />Rapid access to resources<br />Allows entrepreneurs to build and test new ideas without the need to invest in infrastructure or require set-up expertise<br />Who Is Involved Today?<br />The main players: <br /><ul><li>Amazon Web Services
A host of smaller localized organizations developing and operating Cloud-based services.</li></li></ul><li>The Reality<br />Not cheap – probably triple the cost of buying a server, installing and maintaining it.<br />Not fast – particularly disk access. E.g. Amazon EC2 usage of EBS storage 18 MB per second, a new HP server, e.g. DL360 with SAS disks, 400 MB per second read and write<br />Difficult to estimate pricing e.g. pay per RAM hour, GB storage, CPU Core, disk I/O, database transaction, bandwidth usage and operating system. How do you know how many transactions you are going to do in a month? It is so complex there is a market for applications to calculate costs, and businesses reselling Cloud Services with more traditional cost structures.<br />No open standards for Clouds<br />Migration between different Cloud providers is difficult<br />So where is it a good fit?<br />
Case Study – Bumper Sticker<br />LinkedIn’s Cloud Computing Experiment <br /><ul><li>LinkedIn wanted to test rapid application development and Cloud scaling.
Built an application called “Bumper Sticker” in 2008. Allowed a bumper sticker to be added to a Facebook profile.
No longer need to overprovision when purchasing IT systems
If your requirements level out, you may want to switch to a hosted or onsite solution to save costs.</li></li></ul><li>Improve Utilization<br />Greener?<br />In April 2010, VivekKundra, US Federal Chief Information Officer, said in reference to the 1,200 datacentres run by the government:<br />“One of the most troubling aspects about the data centres is that in a lot of these cases, we’re finding that server utilization is actually around 7%.” Industry average is 15-20%. <br />Google achieves more than 50%; Amazon is similar. These result in significant energy saving.<br />