"The concept, quite simply, is that vast computing resources will reside somewhere out there in the ether (rather than in your computer room) and we'll connect to them and use them as needed." - Jonathan Weber (The Times Online) http://go.bath.ac.uk/xpcb "Cloud computing is a buzzword..."
3 aspects of Cloud Computing As described by Thorsten vok Eiken at RightScale: 1. Applications in the Cloud (SaaS): o Google Apps o Flickr 2. Platforms in the Cloud (PaaS): o Google App Engine o Mosso o Force.com 3.Infrastructure in the Cloud (HaaS) o Amazon Web Services http://go.bath.ac.uk/ym2i http://go.bath.ac.uk/kzkz
Applications in the Cloud / SaaS email photo sharing calendars and contacts document sharing (like this!)
Amazon EC2 Elastic Cloud Computing virtual servers for rent called Amazon Machine Images (AMIs) based on Xen priced on per hour from $0.10 to $1 Amazon S3 Simple Storage Service up to $0.18 per GB storage from $0.10 per GB transfer via o REST o SOAP o BitTorrent http://aws.amazon.com/ec2/ http://aws.amazon.com/s3/ Platforms in the Cloud / SaaS - Amazon Web Services
Infrastructure in the Cloud / HaaS - Google App Engine A web application development framework and hosting solution rolled into one That uses the infrastructure available at Google o so their servers + storage: BigTable Currently public preview Pricing to be announced Scalable? Quotas in place while in preview o bandwidth is 10 GB which is plenty o but CPU is 0.2 GHz o max HTTP requests per day is 650,000 o you can apply for an extension (currently) Python only http://code.google.com/appengine/
Microsoft Azure Services Very new: released Monday 27th October (last week!) XaaS o Windows Azure (.Net hosting) o MS SQL Services o Live Services o Microsoft Sharepoint Services o Microsoft Dynamic CRM Services Integrated support in Visual Studio Surprisingly, there are.Net SDKs for: o Java o Ruby! http://www.microsoft.com/azure/
Good & Bad of PaaS/HaaS-based Cloud Computing The Good cheap scales minimal start up costs o for a few £'s I have big servers available resilience is someone else's problem The Bad vendor lock-in o portability very hard single point of failure not yet mature http://go.bath.ac.uk/ufxn http://go.bath.ac.uk/qsen http://go.bath.ac.uk/i2ej