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Cloud Computing.md

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Cloud Computing

Cloud Computing is the delivery of IT resources over the Internet. The cloud is like a virtual data center accessible via the Internet that allows you to manage:

  • Storage services likes databases
  • Servers, compute power, networking
  • Analytics, artificial intelligence, augmented reality
  • Security services for data and applications

Characteristics of Cloud Computing

  • Pay as you go - You pay only for what you use and only when your code runs.
  • Autoscaling - The number of active servers can grow or shrink based on demand.
  • Serverless - Allows you to write and deploy code without having to worry about the underlying infrastructure.

Types of Cloud Computing

Infrastructure-as-a-Service (IaaS)

The provider supplies virtual server instances, storage, and mechanisms for you to manage servers.

Platform-as-a-Service (PaaS)

A platform of development tools hosted on a provider's infrastructure.

Software-as-a-Service (SaaS)

A software application that runs over the Internet and is managed by the service provider.

Cloud Deployment Models

Public Cloud

A public cloud makes resources available over the Internet to the general public.

Private Cloud

A private cloud is a proprietary network that supplies services to a limited number of people.

Hybrid Cloud

A hybrid model contains a combination of both a public and a private cloud. The hybrid model is a growing trend in the industry for those organizations that have been slow to adopt the cloud due to being in a heavily regulated industry. The hybrid model gives organizations the flexibility to slowly migrate to the cloud.

Benefits

There are several benefits to the cloud.

  • Stop guessing about capacity.
  • Avoid huge capital investments up front.
  • Pay for only what you use.
  • Scale globally in minutes.
  • Deliver faster.

Global Infrastructure

Region

A region is considered a geographic location or an area on a map.

Availability Zone

An availability zone is an isolated location within a geographic region and is a physical data center within a specific region.

Edge Location

An edge location is as a mini-data center used solely to cache large data files closer to a user's location.

Additional Information

  • There are more Availability Zones (AZs) than there are Regions.
  • There should be at least two AZs per Region.
  • Each region is located in a separate geographic area.
  • AZs are distinct locations that are engineered to be isolated from failures.