Cloud Computing

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Cloud Computing

• B. Ramamurthy

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Introduction

• Cloud computing is a computing paradigm shift
  where computing is moved away from personal
  computers or an individual application server to
  a cloud of computers. Users of the cloud only
  need to be concerned with the computing service
  being asked for, as the underlying details of how
  it is achieved are hidden. This method of
  distributed computing is done through pooling all
  computer resources together and being managed by
  software rather than a human.
• http//dbpedia.org/page/Cloud_computing

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Cloud Computing

• Cloud computing is a novel platform for computing
  and storage.
• Cloud computing provisions and configures servers
  as needed.
• It allows for more efficient use of the
  enterprise resources and applications.
• It introduces accountability and streamlines
  computing needs of an enterprise.

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Possibilities

• It is possible to consolidate all the needs of an
  organization in a systematic and accountable
  fashion.
• It is possible to procure computing related
  resources similar to how you rent a place for
  living.
• For example,
• you can buy storage on demand from amazon.com in
  a service it offers called the S3
• You can buy computation service from amazon.com
  in its elastic cloud computing service (EC2)
• Usage example You are in charge of IT in a local
  company. You have an immediate need for backing
  up entire set up for a short period of time as a
  mock up for disaster recovery. What would you do?

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A new service model

• Amazon, Google, IBM, yahoo!, and many prominent
  companies are involved in it.
• NSF, Computing Research Association (CRA), CCC
  (Computing Community Consortium) all support it.

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What can it do for you?

• Can quickly launch most applications (ex Web 2.0
  applications)
• It makes it possible to scale up applications
  (tera, peta, and exa bytes of storage as well as
  MFlops of CPU power)
• It can provide security, isolation and other
  non-functional capabilities also.

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Usage Scenario

• Internal innovation
• Virtual worlds (massively multiplayer online
  games MMPOG)
• E-business
• Personal hobbies

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Architecture (My view adapted from Figure 1 of
IBMs document)
Provisioning Interface
Virtual Machines
Provisioning Manager
servers
storage
Monitoring Manager
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Features

• Provisioning manager (IBMs Tivoli) allocates and
  deallocates resources, reserves resources for
  suture use runs on (WebSphere) application
  server
• Provisioning monitor (IBMs Tivoli) monitors the
  health of the allocated resources
• XEN hypervisor is used for creating virtual
  machines

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Advantage

• Typically a pilot team needs about twelve weeks
  to identify, procure and build a pilot
  infrastructure and additional time to build a
  security compliant software stack so that
  developers can begin building or deploying
  applications and code.
• The cloud provides a framework and offering that
  reduces the process to approximately 1 hour.

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