Segments or Sections of Cloud Computing
IaaS (Infrastructure as a Service)
Brings utility computing capability, typically as raw virtual servers, on demand that customers configure and manage. Here Cloud Computing delivers grids or clusters or virtualized servers, networks, storage and systems software, usually (but not always) in a multi-tenant architecture.
- IaaS is planned to enlarge or replace the purposes of an entire data center. This saves cost (time and expense) of capital equipment deployment but does not reduce cost of configuration, integration or management and these tasks must be executed remotely.
- IT infrastructure through virtualization. Virtualisation allows the splitting of a single physical portion of hardware into independent, self-governed environments, which can be scaled in terms of CPU, RAM, Disk and other elements.
- The infrastructure includes servers, networks and other hardware appliances delivered as either Infrastructure “Web Services”, “farms” or "cloud centers". These are then interlinked with others for resilience and additional capacity.
Examples are Amazon.com (Elastic Compute Cloud [EC2] and Simple Storage), IBM and other traditional IT vendors.
Amazon EC2
- Amazon EC2 is one large complex web service.
- EC2 provided an API for instantiating computing instances with any of the operating systems supported.
- It can facilitate computations through Amazon Machine Images (AMIs) for various other models.
- Signature features: S3, Cloud Management Console, MapReduce Cloud, Amazon Machine Image (AMI)
- Excellent distribution, load balancing, cloud monitoring tools
Advantages
- Pay per use
- Instant Scalability
- Security
- Reliability
- APIs
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