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Cloud computing
A large pool of computer resources which are accessed via the network.
These resources are offered “as-a-services”.
Resources can be dynamically scaled up/down.
Cloud computing parameters
Pooled computing resources
Elastic scaling of resources
Virtualization of resources
Pay-as-you-go OR Metered resource usage
Resource delivery over the internet
Automation of new resource deployment and deprovisioning
Pooled computing resources
When providers provide scalable services to multiple consumers which are available without geological constraints.
Elastic scaling of resources
Offers dynamic ability to scale up/down computing resources.
Saves resources and time to handle peak demand.
Base level : normal circumstances and resources
Peak load : abnormal circumstances requiring additional resources
Virtualization of resources
Provides virtual environments which can highly utilize computing resources.
Uses “Slice and Dice” computing resources to create virtual resources which are provided to customers.
Pay-as-you-go
The practice of the customer paying for the resources used
Resource delivery over the internet
Resources are provisioned as a “service” and are delivered via internet.
These are provided as software, platforms or infrastructure.
Automation of new resource deployment and deprovisioning
When resources are requested via an API by the consumer they will be configured and made ready automatically.
Once these resources are no longer required they will be de-provisioned.
Benefits of cloud computing
Reduction in business costs
saves space
requires less time and man-power
enables organizations to focus on core business activities
Infrastructure as a service (IaaS)
Provides resources to the consumer.
e.g. storage, processing power, databases, analytics
Platform as a service (PaaS)
Provides Execution environments.
e.g. GitLab, Google App Engine, Amazon web services
Software as a service (SaaS)
Provides software which exists on the cloud.
e.g. Dropbox, Zoom, Netflix, Google docs
