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BEFORE CLOUD COMPUTING

CLOUD INTERFACE

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Before Cloud Computing

Suppose you want to host a website, there are the following things that you would need to do:

  • Buy a stack of servers
  • High traffic? More servers
  • Monitoring and Maintaining servers
  • Disadvantages
  • The stacker servers are of more cost
  • Troubleshooting
  • Traffic is varying

What is Cloud Computing?

Cloud Computing is :

  • Storing data/application on remote servers
  • Processing data/application from servers
  • Accessing data/applications via the internet

Service Models

  1. Iaas
  2. Paas
  3. Saas

Saas?

Software as a service

  • Cloud provider leases applications or software which are owned by them to its client
  • Example: salesforce.com provides the CRM(Customer Relation Manager) on a cloud infrastructure to its client and charges them for it, but the software is owned by the salesforce company only.

Paas?

Platform as a service

  • No control over the underlying architecture including OS, storage, servers, etc.
  • The cloud provider gives the ability to the customer to deploy customer-created apps using programming languages, tools, etc that are provided by the cloud provider

Iaas?

Infrastructure as a service

  • Provides virtualized computing resources over the internet
  • No worries about the underlying physical machine
  • Abstract the user from the physical machine

Deployment Models

  • A service provider makes resources, such as applications and storage, available to the general public over the internet
  • Easy and inexpensive set-up because hardware, application, and bandwidth costs are covered by the provider
  • No wasted resources because you pay for what you use

Cloud Providers

  1. Google Cloud Platform
  2. Amazon web services
  3. Microsoft azure

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