Cloud Computing

Data centers offer hardware and software, that allows customers to make use of their (virtualized) computing resources and services.

Data centers are vendors that rent servers and computing resources
- Anyone can rent
Fine grained pricing model
- Pay as you go
Can scale on the go
- If you need more, just buy more
- Only pay for what you use

Cloud Provider (e.g. AWS) --> Cloud User / SaaS Provider (e.g. Netflix) --> SaaS User (You)

Cloud User examples

Resources owned and operated by one org, usable by any paying customer

Resources owned, operated and used by a single org.

Note: Can be on-prem and/or hosted

Combine Public and Private cloud. Better control over sensitive data, whilst taking advantage of scale of public cloud provider.

e.g. patient database in private cloud, but API in public cloud

Use multiple clouds for an application / service. Redundant, but introduces complexity (API differences, migration)

Resources located locally (or in a data center operated by company)

Resources hosted and managed by third-party

X as a Service

Rent IT infrastructure (servers and VMs), as well as corresponding networking and security measures.

Get a on demand environment for development/deployment

Build app, without managing servers, as cloud vendors provide that. Using Lambdas, so better scaling?

Cloud hosted software, cloud provider handles all software and infrastructure.

Pros:

Cons