Day 2 - AWS Introduction Class

Main ideas & concepts

• Why cloud is needed (problem-based explanation)

  • Without cloud: A person works on a project for days on a laptop. If the laptop/hard disk gets damaged, the project data can be lost permanently.
  • With cloud: The person uploads project data to a cloud storage drive (e.g., Google Drive). Even if the laptop/hard disk is damaged, the data can be retrieved from the cloud because it’s stored online and accessible via the internet.

• Definition of cloud

  • Cloud is described as:
    • Accessing and storing application/data via the internet
    • A way to retrieve or store data remotely
  • Cloud computing is described as the delivery of computing services, including:
    • Servers
    • Storage
    • Databases
    • Networking
    • Software

• Examples of cloud services

  • Google Drive
  • Facebook
  • Gmail
  • Key point: these require internet to use.

• Cloud providers

  • Examples:
    • AWS
    • Azure
    • GCP (Google Cloud Platform)
  • These providers “provide cloud” by offering cloud services.

• Cloud migration example (deployment/availability motivation)

  • A scenario where “Net” (an online streaming/content service) experiences a major issue causing content not to stream properly.
  • They migrate content/data to the cloud by “approaching AWS” so the service can overcome the problem.

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Cloud computing models (structured from the video)

Service models (3 types)

The video presents these as layers of responsibility between company (customer) and cloud vendor (provider):

1) IaaS — Infrastructure as a Service

• Vendor/cloud provider manages:
  • Virtualization server infrastructure
  • Storage
  • Networking
  • (Implied) much of the underlying server stack
• Company manages:
  • Application data
  • Runtime
  • Middleware
  • OS aspects (as described in the subtitles)

2) PaaS — Platform as a Service

• Company manages:
  • Application data required for the server
• Vendor manages:
  • Runtime
  • Middleware
  • OS
  • Virtualization
  • Server/storage/networking

3) SaaS — Software as a Service

• Vendor manages:
  • The entire application/server environment (including application data and server requirements)
• Company:
  • Provides requirements; the vendor handles the rest

Deployment models (4 types)

The video defines deployment models based on who can access/use the cloud infrastructure:

1) Public cloud

• Accessible by the public / multiple organizations
• Example: AWS hosting applications publicly so any organization can host.

2) Private cloud

• Built/owned by a single organization
• Only the company can access; not shared with other organizations
• Tradeoffs stated:
  • Higher cost
  • Harder to maintain

3) Hybrid cloud

• Combination of public + private cloud aspects
• Used to deliver services using both infrastructure types.

4) Community cloud

• Shared among a group/community of people/customers
• Described as multiple organizations/people using a common platform.

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AWS section (what AWS is and why it’s popular)

• What AWS means

  • Amazon Web Services
  • AWS is introduced as a cloud provider.

• Why AWS is used (as stated)

  • AWS helps application providers/vendors host applications quickly and securely.
  • Example claim: “Net” uses AWS for computing and storage needs including:
    • Databases
    • Analytics
    • Recommendations
    • Video (streaming-related use)

• Why AWS is popular (3 points given)

  1. Pay-as-you-go model
     • Pay only for the services you use (pay for what you consume).
     • Example services: EC2 and VPC (Virtual Private Cloud).
  2. Scalability / many servers
     • Can use “thousands of servers on multiple domains.”
  3. Experience vs other providers
     • AWS is presented as having more experience compared to other cloud providers.

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Intended next steps mentioned for the next class

• Create an AWS account
• Install GitBash
• Execute Linux commands practically (create a server as part of the practice)

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Speakers / sources featured

• Speaker: Not explicitly named in the subtitles (teacher/presenter only).
• Sources/examples used:
  • Google Drive
  • Facebook
  • Gmail
  • AWS (Amazon Web Services)
  • Microsoft Azure
  • GCP (Google Cloud Platform)
  • “Net” / a streaming/content service (referenced as a scenario)
• Mentioned technologies:
  • EC2
  • VPC (Virtual Private Cloud)
  • Linux commands
  • GitBash