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EBU6502_cloud_computing_notes/1-3-economy.md
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2025-01-04 16:53:59 +08:00

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The economics of cloud computing

Cloud Computing Service Model (Not important)

Service oriented Technology

  • Properties
    • Logical view: abstraction of actual processes
    • Message orientation: uses message to communicate
    • Description orientation: described by machine executable metadata
    • Granularity: use small operation, in order to perform complex tasks
    • Network orientation: offered through networks
    • Platform neutrality: standardized format
  • Examples: SaaS, PaaS, IaaS

Objectives:

  • Shift computing, thus management and maintainence
  • High QoS
  • Transparent, and generic standards to boost acceptability

Economic models

Traditional cost model

  • Upfront capital costs (CAPEX, capital expenditure): money spent at the beginning of business to get the equipment
  • Variable cost (OPEX, Operational expenditure): operational cost
  • Calculation:
    • Upfront capital costs + Variable costs

Cloud cost model

  • Calculation
    • Variable costs (no upfront cost)
    • Traditional IT cost minus the upfront capital costs (This sounds stupid and absurd, I hope the profs are not going to make a quiz on this)
  • Optimizing
    • AWS Trusted Advisor: online service, that helps suggesting ways to optimize costs
    • Calculators:
      • TCO: Total cost of ownership calculator, estimate the cost savings when using AWS, compared to traditional IT systems
      • Simple Monthly Calculator: estimate your AWS monthly bills, based on business requirements

Examples

  • Amazon cloud options:
    • Reserved:
      • Reserved capacity: reserve for 1 to 3 years to get discount
      • Reserved instances:
        • All-Upfront RI: Pay everything at once to get huge discount
        • Partial-Upfront RI: Pay part of the amount and get less savings
        • No-Upfront RI: Pay nothing upfront, little saving
    • On-demand instance: Pay as you go
    • Dedicated instance: run on physical server
    • Free: 12 months of free EC2

Motivation for both parties

Subscribers:

  • Cost savings
    • Power
    • Support, Maintainence
    • Software licenses
    • Increased profit
  • Fancy words
    • Innovation
    • Productivity
    • Competitive advantage
    • Elastic
  • Development experience
    • Automation
    • Reliability
    • Scalability

Providers

  • Shared resource, no waste
  • Location independent
  • Variety of customers that can serve

Competition

  • Offerings
    • Free and educational
    • Reserved
    • Novelties: glacier file storage
  • Assurance
    • Risk mitigation
    • Reputation
    • Size

All kinds of models

Service delivery

  • Definition: pre-packaged combination of IT resources, offered by cloud provider as service
  • Examples: previous slide

Deployment

  • Private cloud: on premises cloud
  • Public cloud
  • Community cloud: infra is shared between several organizations
  • Hybrid cloud: public cloud with a private cloud, or on-premises data center

Challenges and opportunities:

Challenges

Opportunities

  • Jobs:
    • AWS Cloud Practitioner
    • AWS Solution Architect
    • AWS Developer
    • AWS DevOps Engineer
    • AWS SysOps Administrator
    • AWS Security Expert
    • AWS Big Data Expert
    • AWS Networking Expert
    • AWS Data Engineer
    • AWS Data Scientist