Infrastructure as a Service
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Overview
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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.[1] | ” |
Key components
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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
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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.
References
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- ↑ Information Technology Reform: Progress Made; More Needs to Be Done to Complete Actions and Measure Results, at 5 n.b.
See also
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