🤖 Cloud Computing
Cloud computing is the delivery of IT resources when needed over the internet. Example: Google Cloud
Cloud computing is a method by which remote servers are used to store files and run applications, rather than storing them locally.
Cloud computing uses virtualisation which one physical server hosts virtually many cloud servers.
This is handled behind the scenes and the end user never realises this.
Advantages and disadvantages#
- Advantages
├── Easy implementation – Allows businesses to retain the same applications and processes without having to deal with any back end settings.
├── Accessibility - You can access the data anywhere, anytime.
├── No hardware required - Everything is hosted online, so no physical hardware is needed
└── Flexibility for growth - The cloud is easily scalable so companies can add or subtract resources based on their needs
- Disadvantages
├── Security
└── Internet connection quality dependent
Virtualisation#
Virtualisation is the virtual instance of a computer system.
Hyper-Visor#
Type 1#
Acts as an operating system for the physical machine and is used for server side virtualisation and has low hardware requirements. Doesn't have to load an underlying OS.
Type 2#
Installed on top of an existing OS
It relies on the host machines preexisting OS to manage calls to CPU, memory, storage and network resources.
Benefits#
- Cloud Portability
└── The ability to move applications and data from one cloud computing environment to anther with minimal disruption.
- Elastic Cloud
└── A cloud computing offering that provides variable service levels based on changing needs.
- Cloud Sourcing
└── An arrangement in which a company pays a third party cloud hosting provider to deliver IT services that could be provided in house. Similar to outsourcing
- Storage
└── Storage is the amount of space you have to store your files. The more you want, the more expansive.
- Cost effective
├── Only get the amount that you need as you can upgrade later.
└──There are many different cloud hosting providers and some may offer the same services for cheaper.