Presented by: Prof Mark Baker

1
An Introduction to Clouds

• Presented by Prof Mark Baker
• ACET, University of Reading Tel [phone]
  8615 E-mail Mark.Baker_at_computer.org
• Web http//acet.rdg.ac.uk/mab

2
What is Cloud Computing?

• Providing Software as a Service (SaaS) -
  delivering applications over the Internet.
• More recently also Hardware infrastructure,
  platform as a service.
• Based on Utility Computing - pay-as-you-go
• The under lying idea of infinite resources,
• No up-front costs,
• Billing (e.g. hourly).

3
Different Cloud Computing Layers?
4
Virtualization

• Virtual workspaces
• An abstraction of an execution environment that
  can be made dynamically available to authorised
  clients by using well-defined protocols,
• Resource quota (e.g. CPU, memory share)
• Software configuration (e.g. O/S, provided
  services)
• Implement on Virtual Machines (VMs)
• Abstraction of a physical host machine
• Hypervisor intercepts and emulates instructions
  from VMs and allows management of VMs
• VMWare, Xen, etc.
• Provide infrastructure API
• Plug-ins to hardware/support structures

5
Cloud-Sourcing

• Why is it becoming a Big Deal
• Using high-scale/low-cost providers,
• Any time/place access via web browser,
• Rapid scalability incremental cost and load
  sharing,
• Can forget need to focus on local IT.
• Concerns
• Performance, reliability, and SLAs,
• Control of data, and service parameters,
• Application features and choices,
• Interaction between Cloud providers,
• No standard API mix of SOAP and REST!
• Privacy, security, compliance, trust

6
Different types of Cloud

• Amazon
• Computing in the cloud!
• EC2 (with S3, SQS and SimpleDB),
• Use Xen VMs,
• Workflow and Security.
• Google
• Apps Python module/API,
• Working also with IBM.
• Microsoft
• Azure!
• Yahoo
• Pipes, Working with Computational Research
  Laboratories
• Sun/IBM/HP and others

7
Cloud Schedule
Day 2 Cloud-based Services 0930 -Welcome and
Introduction to Day 2 of the Workshop, Mark
Baker 0945 - An Introduction to Cloud-based
Services, Paul Watson, Newcastle 1035
-Tea/Coffee (15 minutes) 1050 -The Open Cirrus
Cloud Computing Testbed, Marcel Kunze -
opencirrus 1140 - Clouds and Services for Data
Intensive Research, Roger Barga, MS 1230 - Lunch
(60 minutes) 1330 - Developing Applications for
Cloud Computing Platforms, Jeremy Cohen, IC 1415
-The Attraction of Cloud to Enterprise, vision
and reality, Ian Osborne 1500 - Coffee 1515 -
Cloud-based Security Services, Richard Sinnott,
Glasgow 1600 - IBM and Dynamic Infrastructure,
Doug Neilson, IBM 1645 - Panel and General
Discussion about the days activities (45
minutes)