infrastructure as a Service (IaaS) is
|“||one type of cloud computing in which a vendor offers various infrastructure components such as hardware, storage, and other fundamental computing resources.||”|
|“||[t]he capability provided to the cloud service customer is to provision processing, storage, networks, and other fundamental ]computing resources where the cloud service customer is able to deploy and run arbitrary software, which can include operating systems and [application]]s. The cloud service customer does not manage or control the underlying cloud infrastructure but has control over operating systems, storage, and deployed applications; and possibly limited control of select networking components (e.g., host firewalls).||”|
Key components Edit
Implementation of IaaS typically includes the following layered components:
- Service level agreements (optional)
- Utility computing billing (e.g., per instance hour)
- Platform virtualization environment for running client-specified virtual machines
- Computer hardware (typically set up as a grid for massive horizontal scalability)
- Computer networks (including firewalls, load balancing, etc.)
- Internet connectivity
Key characteristics Edit
The key characteristics of IaaS include:
- Resources delivered as a service including servers, network equipment, memory, CPU, disk space, data center facilities,
- Dynamic scaling of infrastructure which scales up and down based on application resource needs
- Variable cost service using fixed prices per resource component
- Multiple tenants typically coexist on the same infrastructure resources
- Enterprise grade infrastructure allows mid-size companies to benefit from the aggregate compute resource pools.
- ↑ Information Technology Reform: Progress Made; More Needs to Be Done to Complete Actions and Measure Results, at 5 n.b.
- ↑ Cloud Service Level Agreement Standardisation Guidelines, at 13.
See also Edit
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