Some additional words about cloud computing

1
Some additional words about cloud computing
Lionel Brunie National Institute of Applied
Science (INSA) LIRIS Laboratory/DRIM Team UMR
CNRS 5205 Lyon, France http//liris.cnrs.fr/lione
l.brunie
2
Whats a Cloud ?

• "A Cloud is a type of parallel and distributed
  system consisting of a collection of
  interconnected and virtualized computers that are
  dynamically provisioned and presented as one or
  more unified computing resources based on
  service-level agreements established through
  negotiation between the service provider and
  consumers (Buyya et al.)
• A large-scale distributed computing paradigm
  that is driven by economies of scale, in which a
  pool of abstracted, virtualized,
  dynamically-scalable, managed computing power,
  storage, platforms, and services are delivered on
  demand to external customers over the Internet
  (Foster et al.)
• Start point October/November 2007 - IBM Blue
  Cloud

3
Visit of a Cloud vendor web site

• http//www.ibm.com/ibm/cloud/
•  Values to customers include
• Reducing IT management complexity and skill
  requirements
• Sharing resources among multiple applications
• Accelerating application launches
• Supporting both existing and emerging,
  data-intensive workloads

4
Example Amazon EC2/S3

• Compute Cloud EC2 (Elastic Cloud Computing)
•  Private  virtualized servers ( instances )
  of different types
• Example High-CPU Extra Large Instance
• 7 GB of memory
• 20 EC2 Compute Units
• 1690 GB Storage
• Pricing on a per hour basis for each instance
  type from 0.084/hour for the smallest
  "On-Demand" virtual machine running Linux to 12x
  more for the largest one running Windows (Nov.
  2009). The data transfer charge ranges from 0.08
  to 0.15 per gigabyte, depending volume
• Data Cloud S3 (Simple Storage Service)
• from 0.55 to 0.15 per GB-month, bandwidth
  usage (from 0.08 to 0.15 per GB) requests
  (from 0.01 to 0.1 per 1000 requests)
• 102 billion objects stored files (March 2010)
• data transfer is charged by TB / month data
  transfer, depending on the source and target of
  such transfer.

5
IaaS, PaaS, SaaS

• Infrastructure as a Service (IaaS)
• provides computing environments/infrastructure
  i.e., hardware, software
• the provisioned infrastructure can dynamically
  scale up and down depending on the actual needs
• Amazon EC2 and S3
• Platform as a Service (PaaS)
• high-level integrated environment to build and
  deploy applications
• restrictions on the type of applications
• but scalable platform
• Googles App Engine for deploying Web
  applications
• Software as a Service (SaaS)
• delivers software to consumers through the
  Internet
• Salesforce online CRM (Customer Relationship
  Management) Services Live Mesh from Microsoft
  files and folders synchronization

6
Characteristics

• From the customer point of view
• Scalability
• Reliability
• Security and Privacy
• Ubiquitous and fast access
• Quality of Service
• Service Level Agreement
• Pricing system
• Simple to use
• From the internal point of view
• Virtualization
•  Grid  management

7
Comparison of some cloud platforms
From Foster et al.
8
A market oriented vision of a cloud based IT
world
From Buyya et al.