Friday, February 22, 2019

What is Infrastructure-as-a-Service (IaaS) - Explained - SingleWindowTech

Infrastructure-as-a service (IaaS)
Image Credits: Vault Networks

What is Infrastructure-as-a-Service (IaaS)?

IaaS online services that provide high-level APIs used to dereference various low-level details of underlying network infrastructure
like physical computing resources, location, data partitioning, scaling, security, backup etc. 

  • Infrastructure as a service (IaaS) is a form of cloud computing that provides virtualized computing resources over the internet. IaaS is one of the three main categories of cloud computing services, alongside Software as a Service (SaaS) and Platform as a Service (PaaS).
  • It is a service model that delivers computer infrastructure on an outsourced basis to support enterprise operations.
  • It quickly scales up and down with demand, letting you pay only for what you use. It helps you avoid the expense and complexity of buying and managing your own physical servers and other data center infrastructure.

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Business Scenarios Application:

Typical things or domains where one include IaaS are:
  • Test & Development:  Teams can quickly set up and dismantle test and development environments, bringing new applications to market faster. IaaS makes it quick and economical to scale up dev-test environments up and down.
  • Improves business continuity and disaster recovery: Achieving high availability, business continuity, and disaster recovery are expensive since it requires a significant amount of technology and staff. But with the right service level agreement (SLA) in place, IaaS can reduce this cost and access applications and data as usual during a disaster or outage.
  • Innovate rapidly: As soon as you have decided to launch a new product or initiative, the necessary computing infrastructure can be ready in minutes or hours, rather than the days or weeks—and sometimes months—it could take to set up internally.
  • Respond quicker to shifting business conditions: IaaS enables you to quickly scale up resources to accommodate spikes in demand for your application— during the holidays, for example—then scale resources back down again when activity decreases to save money. 
  • Focus on your core business: IaaS frees up your team to focus on your organization’s core business rather than on IT infrastructure.
  • Increase stability, reliability, and supportability: With IaaS there is no need to maintain and upgrade software and hardware or troubleshoot equipment problems. With the appropriate agreement in place, the service provider assures that your infrastructure is reliable and meets SLAs.
  • Better security: With the appropriate service agreement, a cloud service provider can provide security for your applications and data that may be better than what you can attain in-house.
  • Gets new apps to users faster: Because you don’t need to first set up the infrastructure before you can develop and deliver apps, you can get them to users faster with IaaS.

How does IaaS work?

  • Cloud: As with all cloud computing services, it provides access to computing resource in a virtualized environment, “the Cloud”, across a public connection, usually the internet. With IaaS, however, the client is given access to virtualized components in order to build their own IT platforms.
  • Virtual Hardware: The computing resource provided is specifically that of virtualized hardware, in other words, computing infrastructure. The definition includes such offerings as virtual server space, network connections, bandwidth, IP addresses, and load balancers.
  • Servers: Physically, the pool of hardware resource is pulled from a multitude of servers and networks usually distributed across numerous data centers, all of which the cloud provider is responsible for maintaining. 

Characteristics of IaaS:

  • Automated administrative tasks
  • Dynamic scaling
  • Platform virtualization
  • Internet connectivity

Benefits of Using IaaS:

  • Scalability: Resources are available at any time. Therefore there lies no delay in expanding capacity or any wastage of unused capability.
  • No hardware CAPEX: Underlying physical hardware supporting IaaS is set up and maintained by cloud provider saving time and cost. 
  • Style Costing: Service can be accessed on demand and one has to pay for the resources actually used.
  • Location Independence: Service can be accessed anywhere from the Internet, so long as the security protocol cloud tests it.
  • Physical data security: Services are available through public cloud or private clouds hosted externally with the provider.
  • No single point of failure: Multitude of hardware sensors means that should one aspect of the service fail the service will be unaffected.

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