Iaas(Infrastructure as a service )

Iaas

FULL FORM :- Infrastructure as a service .

Fig. Credit : visionhub123.blogspot.com

DEFINITION :-

· There are three main categories of cloud computing services are Iaas(Infrastructure as a service ), platform as a service (PaaS) and software as a service (SaaS) .

· IaaS (Infrastructure as a Service), as the name suggests, provides you the computing infrastructure, physical virtual machines and other resources like virtual-machine disk image library, block and file-based storage, firewalls, load balancers, IP addresses, virtual local area networks etc.

· IAAS (Infrastructure As A Service) :

1. The base layer

2. Deals with Virtual Machines, Storage (Hard Disks), Servers, Network, Load Balancers etc.

Fig. Credit : visionhub123.blogspot.com

CHARACTERISTICS OF IAAS :-

Automated administrative tasks
Dynamic scaling
Platform virtualization
Internet connectivity

Fig. Credit : visionhub123.blogspot.com

EXAMPLES:-

Amazon EC2, Windows Azure, Rackspace, Google Compute Engine.

Fig. Credit : visionhub123.blogspot.com

IAAS ARCHITECTURE :-

IaaS can be delivered via a public cloud, a private cloud, a community cloud or a hybrid cloud. The infrastructure that is delivered by IaaS resides on the bottom layer of a cloud computing stack; with PaaS delivery occurring on the middle layer and SaaS delivery occurring on the top layer. In many cases, IaaS is bundled together with PaaS and SaaS delivery – as a complete cloud computing solution, as is the case with the hosted cloud services delivered by providers such as Amazon.com (i.e. its AWS offering), Google (i.e. its App Engine offering) and Microsoft (i.e. its Azure/AppFabric offerings). In addition, IaaS frequently incorporates virtualization into its design in order to facilitate optimal levels of utilization for physical computing resources. Network connectivity and storage capacity are also included in the IaaS definition, since these resources are a part of the physical computing resources that are delivered by IaaS.